Rule, 2011

Text

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318 · THE GAZETTE OF'!NDIA: EXTRAORDINARY [PARTII-SEC. 3(i)]

MINISTRY OF CONSUMER AFFAIRS, FOOD AND

euauc DJSTRIBUTION (DEPARTMENTOF CONSUMER AFFAIRS) New:Delhl;the.7th February 2011 G.S.R. ll(E).- In exercise of the powers conferred by sub-section {1) read with clauses (c), (f), (h), (i) and.:(?)of sub-section (2) of section 52 of The LegalMetrologyAct2009, (Lof 2010), the Central

CHAPTER I

PREUMINARY

1, Short title and,commencement

(1) These rules may be called the Legal Metro logy {General) Rules, 2011.

(2) They shall come into force on the 1 • day of

2. Definitions In these rules, unless the context otherwise requires,-

(a) "Act" means the Legal Metrology Act, 2009 (1 of2010);

(b) "Schedule" means a Schedule appended to these rules;

(c) "Section" means a Section of the Act;

(d) words and expressions used in these rules and not defined but defined In the Act shall have the meanings respectively assigned to them In the Act.

CHAPTER II

SPEOFICATIONS OF STANDARDS OF WEIGHTS AND

MEASURES

3. Reference standards

(1) Every reference standard weight shall conform, as regards denomination, material used in construction, and design, to the specifications laid down In Part I of First Schedule.

(2) The ;axlmum permissible error In respect of any reference standard weight, on verification or re-verification after adjustment, shall be such as is specified in Part I of First Schedule.

(3) Every reference standard metre bar shall conform, as regards material used in construction, and design, to the specifications laid down in Part II of First Schedule.

(4) The maximum permissible error in respect of any reference standard metre bar, on verification or re-verification, shall be such as Is specified in Part II of First Schedule.

4. Secondary standards

(1) Every secondary standard weight shall conform, as regards denomination, material used In construction, and design, to the specifications laid down In Part I of Second Schedule.

(2) The maximum permissible error in respect of any secondary standard weight, on verification or re-verification after adjustment, shall be such as Is specified In Part I of Second Schedule

(3) Every secondary standard metre bar shall conform, as regards material used in construction, and design, to the specifications laid down in Part II of Second Schedule.

(4) The maximum permissible error in respect of any secondary standard metre bar, on verification or re-verification, shall be such as Is specified in Part II of Second Schedule.

(5) Every secondary standard capacity measure shall conform, as regards denomination, material used in construction, and design, to the specifications laid down In Part III of Second Schedule.

(6) The maximum permissible error in respect of any secondary standard capacity measure, on verification or re-verification after adjustment, shall be such as Is specified in Part III of Second Schedule.

5. Working standards

(1) Every working standard weight shall conform, as regards denomination, material used in construction, and design, to the specifications laid down in Part I of Third Schedule.

(2) The maximum permissible error in respect of any working standard weight, on verification or re­ verification after adjustment, shall be such as Is specified In Part I of Third Schedule.

(3) Every working standard metre bar shall conform, as regards material used in construction, and design, to the specifications laid down in Part II of Third Schedule.

(4) The maximum permissible error in respect of any working standard metre bar,.on verification or re-verification, shall be such as Is specified in Part II of Third Schedule.

(5) Every working standard capacity measure shall conform, as regards denomination, material used · in construction, and design, to the specifications laid down In Part III of Third Schedule.

(6) The maximum permissible error In respect of any working standard capacity measure, on verification or re-verification after adjustment, shall be such as is specified in Part III of Third Schedule.

6. Power to specify any other reference, secondary or working standard ( 1) Any other reference standard, or secondary standard, or workingstandard shall conform as regards · the denomination, material used in construction, and design, to such specifications as the Central Government may, from time to time, by notification, specify.

(2) The maximum permissible error In relation to such other reference standard, or secondary standard, or working standard shall be such as the Central Government may, from time to time, by notification, specify and different maximum permissible errors may be specified in relation to different types of reference standards, or secondary standards, or working standards.

CHAPTER ill

SPECIACATIONS OF STANDARD EQUIPMENT

7. Reference standard balances

(1) A set of reference standard balances shall be maintained at every place where the reference standard weights are kept for the purpose of verification of secondary standards.

(2) The number, types and specifications of such balances shall be as are specified in Part I of Fourth Schedule.

(3) Every reference standard balance shall be verified at least once In six months and shall be adjusted, if necessary, to make it correct within the limits of sensitivity and other metrological qualities as are specified in Part I of Fourth Schedule.

s. Secondary standard balances ( 1) A set of secondary standard balances shall be maintained at every place where secondary standard weigbts are kept for the purpose of verification of working standards.

(2) The number, types and specifications of such balances shi!.11be as are specified in Part II of Fourth Schedule.

(3) Every secondary standard balance shall be verified at leastonoe In one year and shall be adjusted, if necessary, to make It correct within the limits of sensitivity and other metrological qualities as are specified in Part II of Fourth Schedule.

9. Working standard balances

(1) A set of working standard balances shall be maintained at every place where working standard weights are kept for the purpose of verification of weights Intended to be used for transaction or protection.

(2) The number, types and specifications of such balances shall be as are laid down In Part III of Fourth Schedule.

(3) Every working standard balance shall be verified at least once in a year and shall be adjusted, if necessary, to make it correct within the limits of sensitivity and other metrologlcal qualities as are specified In Part III of Fourth Schedule.

10. Power to specify the standard equipment The Central Government may, by notification, specify such other standard equipment as it may think necessary to carry out the provisions of the Act and every such standard equipment shall conform, as regards the metrologlcal qualities, to such specifications as the Central Government may, in the same notification or subsequent notification, specify.

CHAPTER IV

WEIGHTS OR MEASURES AND WEIGHING AND

MEASURING INSTRUMENJS

11. Weights

(1) Save as otherwise provided in these rules, every weight used or intended to be used- (a). In any transaction, or

(b) for protection, shall conform, as regards physical characteristics, configuration, constructional details, materials, performance, tolerances and such other details, to the corresponding specifications laid down for such weight in Fifth Schedule.

(2) The maximum permissible error in respect of such weight shall be such as is specified In Fifth Schedule.

(3) Nothing in this rule shall apply to the product of an Industry which is required, by or under any law for the time being in force, to conform to any other specifications with regard to the matters specified In sub-rule ( 1) or sub-rule (2), if, under such law, the product Is required to conform to the specifications laid down by the International Organisation of Legal Metrologywith regard to the matters aforesaid.

12. Measures (other than measuring instruments)

(1) Every measure used or intended to be used for-

(a) any transaction, or

(b) protection, 320 THE GAZETTE OF INDIA:EXTRAORDJNARY [PARTJI-SEC. 3(i)] shall conform, .as. regards physical characteristics, configuration, constructional details, materials, performance, tolerances and such other details, to the corresponding.specifications laid down for such measure in Sixth Schedule.

(2) The maximum permissible error In such measure shall .be such as is specified in the corresponding.specifications laid down for such · measure in Sixth Schedule.

(1) Every.weighingInstrument used or intended tobe used-

(a) in any transaction, or

(b) for protection, shall conform, as regards physical characteristics, configuration, constructional details, materials, performance, tolerances and such other details, to the corresponding specifications laid down for such weighing instrument In Seventh Schedule:

(2) Every measuring instrument used or Intended to be used-«

(a) in any transaction, or

(b) for protection, shall conform, as regards physical characteristics, configuration, constructional details, materials, performance, tolerances and such other details, to the corresponding specifications laid down for such measuring instrument In Eight Schedule.

(3) The maximum permissible error on such weighing or measuring Instrument shall be such as is specified in the corresponding specifications laid down for such weighing or measuring instrument In Seventh Schedule or as the case may be in Eighth Schedule.

14. Procedure for carrying out calibration of vehicle tanks, etc.

The procedure for carrying out calibration of vehicle tanks, etc. shall be as is specified In Ninth Schedule.

CHAPTERV

IMPORT OF WEIGHTS AND MEASURES

15, Registration of Importer

(1) Every manufacturer or dealer of weight or measure who intends to Import any weight or measure shall apply to the Director, through the Controller of the State in which he carries on such business, for registration of his name as importer In the form specified in Tenth Schedule.

(2) Everyapplication received by the Controller under sub-rule (1) shall be forwarded by him to the Director with a report as to the antecedents and technical capabllltles of the applicant.

(3) Nothing in this rule shall take away or abridge the right of any person referred to in sub-rule (2) to carry on the business of importing of any weight or measure until he has been informed by the Director In wfitlng that he cannot be registered as an importer, and on receipt of such letter he shall stop forthwith the Import of any weight or measure:

PROVIDED that registration of a person carrying on, at the commencement of these rules, the business of importingweights or measures shall not be refused except after giving him a reasonable opportunity of showing cause against the proposed action.

(4) Every application for the. registration of an importer shall be submitted to the Director, in the manner aforesaid, together with the fee specified In Twelfth Schedule, at least one month before the date on which Import is proposed to be made.

(5) The registration of a person as an importer shall remain effective for a period of five years from the date of such reg istratlon.

(6) On the expiry of the period of registration as an importer, the Director may, on the application of the registered importer and on payment of the prescribed fee, renew registration for a like period.

(7) The registration or renewal of the registration of a person as an importer may be suspended or revoked before the expiry of the period of validity thereof, If the Director is satisfied after an inquiry,and after giving to the person concerned a reasonable opportunity of being heard, that any statement made by such person in the application for registration or renewal of registration was false or incorrect In material particulars or that such person has contravened any provision of the Act or rules made there under or any term or condition of such registration.

16. Conditions, etc. for manufacture of a weight or measure exclusively for export

(1) The provisions of this rule shall apply to weights or measures which are made or manufactured excluslvely for the purpose of export.

(2) No non-standard weight or measure shall be made or manufactured by any person unless he has obtained the previous permission from the Central Government.

(3) Every person intending to manufacture any non-standard weight or measure for the purpose of export shall make an application for permission to the Central Government on payment of a fee of rupees five hundred for such permission authorising him to manufacture such weight or measure and shall in such application Indicate-

(a) his name and full address;

(b) location of the factory in which such weight or measure is proposed to be manufactured;

(c) description of weight or measure proposed to be manufactured;

(d) documentary or other evidence indicatingthe existence of a firm contract for the export aforesaid or where there is no such firm contract for export, documentary or other evidence Indicating that there ls likely to be a demand for the export of non-standard weight or measure.

(4) The Central Government shall, If It is satisfied from the documentary or other evidence produced by the applicant or otherwise that the applicant Intends to manufacture non-standard weight or measure for export, grant the permission authorising him to manufacture such weight or measure;

Provided that the Central Government may, if it Is satisfied that the applicant has contravened any of terms and conditions of the permission or that weights or measures manufactured by the applicanthave found their way tnto the Indian market or that the applicant had made any statement in his appllcatlon for the permission which Is false In material particulars or he had concealed some material particulars, cancel the permission:

Provided Further that no permission shall be cancelled except after giving to the applicant a reasonable opportunity of showing cause against the proposed action.

(5) Every permission granted under sub-rule

(4) shall remain valid for a period of one year and shall be renewed for a like period on payment of a like fee unless the Central Government is satisfied that the applicant has made any statement in his application which is false In material particulars or that he had concealed some material particulars or had contravened any provision of the Act or any rule made there under:

Provided that no order for the refusal to renew a licence shall be made by the Central Government except after giving the applicant a reasonable opportunity of showing cause against the proposed action.

(6) Every person who is granted permission under this rule shall submit to the Central Government, at the end of the calendar year, a statement as to the quantity of the non-standard weights and measures exported by him and the particulars of the person to whom such export has been made.

17. Prohibition on sale of non-standard weight or measure within the country No non-standard weight or measure made or manufactured exclusively for export shall be sold or otherwise distributed within the territory of India.

18. Maintenance of record In relation to non· standard weight or measure Every person who makes or manufactures any non-standard weight or measure for export shall maintain a monthly record of the number of such non­ standard weights or measures manufactured by him, number of weights or measures already exported by him, and number of weights or measures in stock or under production. The record so maintained shall be open to Inspection by any officer authorised by the Central Government in this behalf.

19. sample checking of weight and measure {1) Standard weights or measures which are intended for export shall not ordinarily require any verification and stamping, but If the party to whom the export Is to be made so requires, a sample checking of such weight or measure shall be made by such agency as the Central Government may specify in this behalf, and thereupon the agency so specified shall, after checking the weight or measure, issue a certificate Indicating whether or not such weight or measure conforms to the requirements of the Act and the rules made there under:

(2) The weight or measure to be checked as sample under this rule shall be selected at random and proper records shall be maintained with regard to the sample checking so made.

(3) The Central Government shall, while specifying the agency for checking the weight or measure, ensure that the agency completes the checking well In time so that the export of the weight or measure Is not delayed by reason of such checking.

20. Checking of non-standard weights and measures sample which are to be exported

(1) Non-standard weight or measure, which Is made or manufactured exclusively for export, shall not ordinarily require any verification and stamping, but if the party to whom the export is to be made so requires, a sample checking of such weight or measure shall be made by such agency as the Central ?ovemment may specify in this behalf; and thereupon the agency so specified shall, after checkingthe weight or measure, Issue a certificate Indicating whether or not such weight or measure conforms to the specifications given by the party to whom the export · is to be made or, where the party aforesaid has not given any specification, whether the weight or measure conforms to the specifications laid down by the manufacturer.

(2) The weight or measure to be checked as sample under this rule shall be selected at random and proper records shall be maintained with regard to the sample checking so made.

(3) The fee for checking of any non-standard weight or measure shall be-

(i) if it Is similar to .any standard weight or measure, ·equal to the fee levlable for the verification and stamping of such standard weightormeasure; and

(ii) where such.non-standard weight or measure is not ·similar to any standard weight or measure, the Central Government may specify such amount as fees as is commensurate with the labour Involved in checking the non-standard weight or measure.

(4) The Central Government shall, while specifying the agency for checking the non-standard weight or measure, ensure that the agency completes the checking well In time so that the export of such weight or measure Is not delayed by reason of such checking.

CHAPTER VI

NON-STANDARD WEIGHT OR MEASURE TO BE USED

FOR SOENTIFIC INVESTIGATION OR RESEARCH

21. Permission to get manufactured non· standard weight or measure for scientific Investigation or research Where the manufacture of any non-standard weight or measure Is needed exclusively for the purpose of scientific Investigation or research, the person needing such non-standard weight or measure shall make an application to the Central Government for permission to get such non-standard weight or measure manufactured and on receipt of such application, if the Central Government is satisfied that the manufacture of such non-standard weight or measure is needed for the purpose aforesaid, it may authorise the applicant to get the non-standard weight or measure needed by him manufactured by such manufacturer as he may think fit, and thereupon, it shall be lawful for such manufacturer to manufacture the said non-standard welght or measure In accordance with the speclflcatlons given by the applicant.

Explanation:For the purpose of this rule, a non· standard weight or measure means a weight or measure which Is, or Is proposed to be, manufactured In accordance with any unit of weight or measure, other.thar, standard unit of weight of measure specified by or under the Act

CHAPTER VII

22. The manner of disposal of goods seized under this Act/rule

(1) Where any goods seized under sub· section (3) of Section 15 are subject to speedy or natural decay, the Director or any person authorised by him or Controller and other LegalMetrologyOfficers In this behalf shall have the goods weighed or measured on a verified weighing or measuring instrument available with him or near the place of seizure and enter the actual weight or measure of the goods In a form specified by the Director for this purpose and shall obtain the signature of the trader or his agent or such other person who has committed the offence. The goods in question shall, after such weighing or measuring is returned to the trader or the purchaser as the case may be:

PROVIDED that if the trader or his agent or the other person (who has committed the offence) refuses to sign the form, the Director or the person authorised by him In this behalf shall obtain the signature of not less than two persons present at the time of such refusal by the trader or his agent or other person.

(2) Where the goods seized under sub­ section (1) are contained in a package and the package is false or does not conform to the provisions of the Act or any rules made there under and the goods In such package are subject to speedy or natural decay, the Director or any person authorised by him or Controller an,dother Legal Metrology Officers in this behalf, so far as may be, may dispose of the goods In such package in accordance with the provisions of sub-rule (1).

(3) Where the goods seized under sub-rule (1) are not subject to speedy or natural decay, the Director or any person authorised by him or Controller and other Legal Metrology Officers In this behalf may retain the package for the purpose of prosecution under this Act after giving the trader or his agent or the other person (who has committed the offence) a notice of such seizure.

23. Time within which unverified weight and measure to be verified and stamped No unverified weight or measure, seized under sub-section (3) of Section 15, shall be forfeited if the person, from whom such weight or measure was · seized, agrees to get the same verified and stamped within a period of ten days or such extended period from the date of such seizure; and for this purpose, the person making the seizure of such weight or measure shall afford a reasonable opportunity by returning such weight or measure exclusively for the verification and stamping.

24. Register and reports to be maintained by persons referred to In Section 17 of the Act

(1) Every person referred to in sub-section (1) of Section 17 shall maintain a register In the appropriate form set out In Eleventh Schedule.

(2) Notwithstanding anything contained In sub· rule ( 1), if the Director Is of the opinion that having· regard to the nature or volume of the business carried on by any maker, manufacturer, dealer or repairer, it Is necessary to do so, he may, by order, exempt any such maker, manufacturer, dealer or repairer from the operation of that sub-rule.

25. Scale of fee The scale of fees to be collected for the service specified in column (2) of Twelfth Schedule shall be at the rate specified in column 3 of the said Schedule.

26. Useofregfonal languages .

Any legend or denomination specified in any Schedule to these rules, which is required to be Indicated on any weight or measure in English, or in Devanagri script, may also be indicated (Inaddition to English or Devanagrl) on such weight or measure in such regional language as the manufacturer may consider to be practicable.

27. Periodical verification of weights or measures-

(1) Every weight or measure used or intended to be used in any transaction or for protection of living beings or things In clause (k) of Section 2 shall be verified and stamped by the Legal Metrology Officer in the State in which such weight or measure is put to use and shall be re-verified and stamped at periodical Intervals.

(2) The re-verification shall be carried out on the completion of a period of,-

(a) twenty four months for all weights, capacity measures, length measures, tape, beam scale and counter machine,

(b) sixty months for storage tanks, and

(c) twelve months for all weight or measure includlng tank lorry other than that mentioned In clauses (a) & (b),

(3) Notwithstanding anything contained in sub· rule (2) every weight or measure which has been verified and stamped In situ shall, if it Is dismantled and re-installed before the date on which the verification falls due shall be duly re-verified and stamped, before being put into use.

(4) Notwithstanding anything contained in sub· rule (1) every weight or measure which has been verified and stamped shall, if It Is repaired before the date on which the verification falls due shall be duly re-verified and stamped before being put into use.

28. Quallftcatlons of Legal Metrology Officer

(1) No person shall be appointed as Legal Metrology Officer unless he -

(a) Is a graduate of a recognized university In Science (with physics as one of the subjects), tech noiogy or engineering or holds a recognized diploma In engineering with three years professional experience; and

(b) is able to speak, read and write the regional language of the State.

(2) Nothing in sub-rule (1) shall apply to officials who have been working as Legal Metrology Officer and are also eligible for promotion to the next higher grade of Legal Metrology Officer on the date of commencement of these rules.

(3) The person appointed to the post of Legal MetrologyOfficer shall have to successfully complete the basic training course at the Indian Institute of Legal Metrology,Ranchi before his posting.

(4) The Central Government may, in consideration of the practical dlfficulties faced by the State Government and on its recommendation, relax the qualification specified in sub-rule (1) for the post of legal Metrology Officers for that State.

29. Nomination of Director by a Company under the Act Every company shall inform the Director (Legal Metrology) or the concerned Controller or his authorized officer, by notice in duplicate, in the format specified in Thirteenth Schedule containing the name and address of its Director after obtaining his consent in writing, who has been nominated by the company under sub-section (2) of Section 49 to be in-charge of and be responsible for the conduct of business of the company or any establishment, branch or unit thereof.

30. Repeal and savings

(1) The Standards of Weights and Measures (General) Rules, 1987 (herein under referred to as the seld rules) are hereby repealed.

Provided that such repeal shall not affect:

(a) the previous operations of the said rules or anything done or omitted to be done or suffered therein; or

(b) any right, privilege, obligation or liablilty acquired, accrued or incurred under the said rules; or

(c) any penalty, forfeiture or punishment incurred in respect of any offence committed against the said.rules; or

(d) any investigation, legal :proceedings or remedy in respect of .any such right, privilege, obligation, liability, penalty, forfeiture or·punishment as aforesaid, And any such tnvesttqetten, legal proceedings or remedy may be Instituted, continued or enforced and any such penalty, forfeiture .or punishment may be Imposed as if the said rules had not been rescinded.

(2) Notwithstanding such repeal anything done or any action taken or purported to have been done or taken induding approval of letter, exemption granted, fees collected, any adjudication, enquiry or investigation commenced, license and registration of manufacturers, dealers, importers ot weights and measures, non-standard weights and measures or show cause nonce, decision, detenninatlon, approval, authorisation issued, given or done under the said rules shall .ifIn force at the commencement of the said rules continue to be In force and have effect as If Issued, given or done under the corresponding provisions of these rules,

(3) The provisions of these rules shall apply to any applicationmade to the Central Government or as the case may be the State Government under the said rules for licence, registration of manufacturers, Importers, dealers, repairers of weights and measures pending at the commencement of these rules and to any proceedings consequent thereon and to any registration granted In pursuance thereof.

(4) Any legal proceeding pending In any court under the said rules at the commencement of these rules may be continued In that court as If these rules had not been framed.

(5) Any appeal preferred to the Central Government or as the case may be the State Government under the said rules and pending shall be deemed to have beer. made under the corresponding provisions of these rules.

INDEXOFSCHEDULEOFTHELEGALMETROLOGY

(GENERAL) RULES, 2011

FIRST SCHEDULE

Bulk Meters Water Meters

THIRD SCHEDULE

Working Standard Weights Working Standard Metre Bar

FOURTH SCHEDULE

Reference Standard Balances Secondary Standard Balances Working Standard Balances

FIFTH SCHEDULE

Weights (Other than Carat Weights) carat Weights Standard Weights for testing of High capacity Weighing Machine

SIXTH SCHEDULE

Liquid Capacity Measures Dispensing Measures Liquor Measures · Folding Scales Fabric or Plastic Tape Measures Steel Tape Measures Counter Machines Beam Scales Surveying Chains Tapes for Use In Measurement of OIi Quantities SEVENTH SCHEDULE· HEADING A PART!

PART II

PARTIII

AllTOMAllCGRAVIMETRIC FIWNG

INSTRUMENTS

WEIGHERS)

PART!

PART II

PART IX

PART VII

PART VIII

PART!

PART II

PART III

PART!

PART II

PART!

PART II

PART III

PART!

PART II

PART III

PART IV

PARTV

PART VI

Reference Standard Weights Reference Standard Metre Bar

SECOND SCHEDULE

Secondary Standard Weights Secondary Standard Metre Bar Secondary Standard Capacity Measures PART!

PART II

PART I

· PARTII

PART III

. .,.. . ,. .. ,,.. ....•....... -·,·:r- t I PART!

PARTY

PART II

PART VI

5 kg 2 kg 1 kg Denomination

2. Materials

(a) Weights of 5 kg to lg shall be made from chromium alloy (80 Ni, 20 Cr) or austenltlc

(b) Weights of 500 mg to 10 mg shall be made from wire of either pure platinum, nickel chromium alloy (80 NI, 20 Cr) or austenltlc stainless steel (25 NI, 20 Cr) or (20 Ni, 25 Cr).

(c) Weights of 5 mg to 1 mg shall be made of aluminium wire. Copper, silicon and zinc contained as impurities in aluminium shall not exceed 0.3 per cent in the aggregate.

Nohl:The material used for all the weights shall be non-magnetic and it shall be ensured that the finished weights are also practically non-magnetic.

3. Shape and finish

(a) For kilogram and gram series- Integral cylindrical body with knob rounded at top.

(b) For milligram series- The weights shall be made from the wire having five segments for 500, SO, 5 mg weights, two segments for 200, 20, 2 mg weights and one segment for 100, 10, and 1 mg weights. One end of the wire shall be bent at rightangles for the purposes of lifting It with a pair of forceps.

(c) The denominations shall be marked only on kilogram and gram series weights.

(d) The entire surface of the weights, including their base and corners shall be free from any roughness and the surface of the weights when inspected visually shall not show any porosity and shall have a mirror finish.

4. Maximum permissible errors Measuring Systems for LiquidsOther than Water Volumetric Container Type Liquid Clinical Thermometer Monometers of Instruments for Measuring Arterial Blood Pressure (Sphygmomanometers) Taximeter Compressed gaseous fuel (CNG) measuring systems for vehicles NINTli SCHEDULE PROCEDURE FOR CARRYING OllT

CAUBRATION OF VEHICLE TANKS ETC.

Calibration of Vehicle Tanks for Petroleum Products and other Liquids Method for Calibration of Vertical Oil Storage Tanks Method for Computation of Capacity Tables for Vertical Oil Storage Tanks.

IMPOR'IEROFWEIGHTSAND MEASURES

Kilogram series Gram series Milligramseries so 50

PART IV

PART VII

PART VIII

PART IX

PART III

ELEVENTH SCHEDULE

MANUFACTURERS/DEALERS/REPAIRERS OF

WEIGHTS AND MEASURES

SCALE OF FEE

Formatfor nomination of the Director by the Company

FIRST SCHEDULE

PERMISSIBLE ERRORS, IN RESPECT OF

REFERENCE STANDARDS

PART I REFERENCE STANDARD WEIGHTS

l. Denominations -,THE· GAZETTE·OF INDIA: EXTRAORDINARY

5. Protective and canying case

(a) These weights shall be stored In their boxes made from teakwood or any other suitable non-corrosive material with proper housing lined with chemicallyneutral velvet, chamois leather or soft plastic material. Wood used in such boxes shall be reasonably free from resins and volatile materials. Glue shall not be used for fixing velvet or such other material. The weights shall be housed in such a manner so as to avoid their movement during transit.

(b) Each milligramweight shall be providedwith a separate housing. A covering glass or a sheet of any other transparent and non­ reactive and non-corrosive material shall be provided so as to ensure that these weights are not dislocated during transit.

(c) A suitable device for lifting the kilogram and gram weights covered with chamois leather or other suitable material shall be provided.

A pair of forcepscapable of lifting easily milligram weights shall also be provided.

6, Inscription The boxes containing the weights shall have the followinginscriptions:

(a) The words 'Reference Standards Weights' .

(b) The Identification number of such boxes,

(c) The name of the manufacturer, 500g 200g SOg 20g 10g 5g 2g lg 500mg 200mg 100mg 50mg 20mg 10mg 5mg 2mg 1 mg [PARTII-SEC. 3(i)]

(d) The material used for weights, (I) kilogram and gram series,

(e) The year of manufacture,

(f) The verification mark of the NPL.

PART II· REFERENCE STANDARD METRE BAR

1. Material The Reference Standard Metre Bar (hereafter called metre bar) shall be manufactured from 58 per cent nickel-steel.

2. Shape and dimensions

(a) The metre bar shall be of H-sectlon, approximately 25 mm x 25 mm (as per Figure 1)

(b) The overall length of the metre bar shall be 1030 ±1 mm and the graduated length shall be 1008mm.

(c) Ungraduated space of 11 mm shall be left after the last graduation mark.

3. Finish The graduated surface shall be bright highly polished, and free from surface Irregularities in the neighbourhood of the graduation marks.

4. Graduations

(a) The main scale shall be situated on the neutral plane and shall be graduated In millimetres throughout from Oto 1000 mm.

(b) The main scale shall also have one additional mm mark before O and another after 1000 mm mark.

(c) An additional fine scale shall also be provided at each end of the main scale for calibrating a micrometre microscope. This fine scale shall consist of ten 0.1 mm graduations (1 mm sub-divided into 10 parts) and shall be situated before the first graduation mark after leaving a blank space of 2 mm and also after the last mark with the same blank spacing.

(d) The graduation marks shall be well-defined, of symmebicalsection and have dean edges.

(e) The width of graduation marks shall be between 8 and 10 micrometres. This width shall be constant to within ten per cent over the length of each mark between the longitudinal setting lines.

(f) The graduation marks shall not differ in width one from another by more than ± 10% of the average width of all the marks.

(g) The graduation marks shall be parallel to one another to within one micrometre between the longitudinal setting lines.

(h) The graduation marks shall be square to the scale axis to within ten minutes of arc.

(i) The length of graduation marks shall be as follows:- The marks shall be disposed equallyon either side of an Imaginary centre line.

(j) The lengths of the graduation marks on the two fine scales referred to In 4(c) shall be as follows :- 3 mm for first and last mark.

(k) The Bessel points shall be indicated by two vertical lines marked on either external side of the metre bar. The Bessel points shall be 571 mm apart, and shall be disposed equally on either side of the 50 mm mark.

(I) No figures or numerals shall be marked on the surface of the main scale.

(m) When supportedat the marked Bessel points, the graduated surface shall be flat to within o.os mm, I.e. all points on the surface shall be between two parallel planes 0.05 mm apart.

5, Auxiliary scale

(a) An auxiliary scale shall be marked on one of the top edges of the metre bar.

(b) The auxiliary scale shall consist of 1000 marks corresponding to the marks of the main scale.

(c). The marks of the auxiliary scale shall be collinear (i.e., passing through the same vertical planes) with the graduation marks of the main scale to within± 0.1 mm.

(d) The width of graduation marks shall be not more than 100 micrometres and shall be clearly visible to the naked eyes having normal vision.

(e) The length of the graduation marks shall be:

One of the ends of all the marks shall lie on a straight line.

(f) The centimetre graduation marks shall be numbered in the Increasing order of numeration.

(g) The height of the numerals and the letters shall be approximately 3 mm.

6. Setting lines

(a) A pair of longitudinal setting lines shall transverse the graduation marks and shall be parallel to the scale axis to within one minute of arc.

(b) The two longitudinal lines shall be disposed symmetrically on either side of the centre of the graduation marks.

. •s o.i .. .., " ' 'I'-;!""'' t· ';

; i , \I

REFERENCE STANDARD METRE BAR

328 ·THE .GAZETTE OF INDIA : EXTRAORDINARY , [PARTII-SEC. 3(i)]

2. Materials

(a) Weights of 10 kg to 1 g shall be made from admiralty bronze (BBCu, 10 Sn, 2 Zn), or nickel-chromium alloy (80 Ni, 20 Cr) or austenitic stainless steel (20 Ni, 25 Cr) or

(b) Weights of 500 mg to SO mg shall be made from cupro-nickel (75 Cu, 25 Ni), or nickel chromium alloy (BONI,20 Cr), or austenltlc stainless steel (20 NI, 25 Cr), or (25 NI, 20 Cr).

(c) Weights of 20 mg to 1 mg shall be made of aluminium sheets. Copper, silicon and zinc contained as impurities in aluminium shall not exceed 0.3 per cent In the aggregate.

3. Shape and finish

(a) For kilogram and gram series-Integral cylindrical body with knob flattened at the top. Weights of 10 kilogram to 100 gram (both inclusive) shall have adjusting devices.

(b) For milligram series-the weights shall be In the form of square sheets, one of the corners being bent at right angle.

(c) The denominations shall be marked only on kilogram and gram series weights.

(d) The entire surface of the weights, including their base and corners shall be free from any roughness and the surface of the weights, when inspected visually, shall not show any porosity and shall have a mirror polish appearance.

4. Maximum permissible error

(c) The separation of the longitudinal setting lines shaitbe 0.2 mm anditheirwidth shall be in between s.and 10,micrometres.

to wlthln'30 micrometres.

(e) The longitudinalsetting lines shall be parallel

(a) When the metre bar -is supported on its marked: Bessel;points, the errors In length between ·any two graduation marks of the main scale:atthe temperature of 20°c, shall not exceed:O:OlO·mm.

(b) In the ,case of the fine scales, the error between any two 0.1 mm marks shall not

8. Insaiption The metre bar shall bear the followingInscription :

(a) the words "REFERENCE STANDARD METRE MR"

(b) the identification number of the metre bar,

(c) the verification mark of the NPL, after the first calibration and marks of subsequent verification to be made on the plate of the carrying case of the metre bar,

(d) the name of the manufacturers,

(e) the material of the metre bar,

(f) the words, figures and letter "STANDARD AT20°C',

(g) the year of manufacture.

9. Protective and carrying case

(a) The standard metre bar shall be housed in a case made from suitable material and provided with a handle, lined Internally with velvet, a plastic material or any other material and In such a way that the metre bar is not likely to be damaged, particularly by shocks or corrosion.

(b) The case shall have affixed on It a plate bearing the inscription "REFERENCE STANDARD METRE BAR" and the identification number.

SECOND SCHEDULE

DENOMINAnONS, MATERIALS, SHAPE AND P£RMISStBlE ERRORS

INRESPECTOFSECONDARYSTANDARDS

PART I-SECONDARY STANDARD WEIGHTS

J. Denominations Kilogram series Gram series Mill/gramseries

(1) I (2) 1 /so Denomination 10 kg 5 kg 2 kg 1 kg 500g 200g 100g 50g LO s. Protective and carrying case

(a) These weights shall be stored In their boxes made from teakwood or any other suitable non-corrosive material with proper housing lined with chemically neutral velvet1chamois leather or soft plastic material. Wood used in such boxes shall be reasonably free from resins and volatile materials. Glue shall not be used for fixing velvet or such other material. The weights shall be housed in such a manner so as to avoid their movement during transit.

(b) Each milligramweight shall be providedwith a separate housing. A covering glass or a sheet of any other trensparent, non-reactive and non-corrosive material shall be provided so as to ensure that these weights are not dislocated during transit.

(c) A suitable device for lifting the kilogram and gram weights, covered with chamois leather or other suitable material, shall be provided.

A pair of forceps capable of lifting easily milligram weights shall also be provided.

6. Inscription The boxes containing the weights shall have the followinginscrlptions:-

(a) the words 'SECONDARY STANDARD

WEIGHTS',

(b) the Identification number of the secondary standard weights,

(c) the name of the manutacturer,

(d) the material used for weights­

(i) kilogram & gram series

(e) theyearofmanufacture, (tj the mark of verification.

20g 10g 5g 2g lg 500mg 200mg 100mg 50mg 20mg 10mg Smg_ 2mg 1mg

1. Material The secondary standard metre bar (hereafter called metre bar) shaff be manufactured from 58 per cent nickel-steel.

2, Shape and dimensions

(a) The metre bar shall have a rectangular cross· section with dimensions 30mm x 15mm approximately.

(b) The top surface shall have two rectangular grooves along its length (as per Figure 2).

(c) The overall length of the measure shall be 1030 ±1 mm and the graduated length shall be 1010 mm.

(d) Ungraduated space of 10 mm shall be left after the last graduation mark.

3. Finish The graduated surface shall be bright, highly polished and free from surface Irregularities in the neighbourhood of the graduation mark.

4, Graduations

(a) The metre bar shall be graduated in millimetres throughout from Oto 1000 mm.

(b) A length of 10 mm before the zero graduation mark shall also be graduated in millimetres.

(c) The scale shall be regular. The width of the graduation marks shall be between thirtyand fifty micrometres.

(d) The width of the graduation marks shall be uniform to within ± ten per cent of the average width of all the marks.

(e) Each graduation marks shall be straight to within ten micrometres over its length.

(f) The graduation marks shall be parallel to one another to within ten micrometres.

(g) The graduation marks shall be square to the scale axis to within twenty minutes of arc.

(h) The graduation marks representing centimetres shall be longer than those representing half centimetres and the graduation marks representing half centimetres shall be longer than those representing millimetres.

(I) The length of the graduation marks shall be not less than:

These marks shall be disposed equally on either side of an imaginary centre line defined by the two setting lines.

330 -·THE GAZETTE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)]

(j) There shall be two short longltudinal•setting lineseachof·5 mm in length which shall be drawn leaving a· blank space.of 2 mm, the one before the first and.the other after the last graduation mark. Jhelongitudinal lines shall be.en a straight line which represent the im13.glnai;ycentral·line and the departure from the central line.shall be not more than 0.1mm.

(k) When supported on the Bessel points or on a ? surface cthe graduated surface shall be flatto,wlthfn 0,05 mm, i.e. all the points on the surface shall.be between two parallel S. Auxiliaryscale

(a) Auxillaryscale shall be marked on one of the top edges of the metre bar.

(b) The auxiliaryscale shall consist of centimetre and half centimetre marks corresponding to the marks or the main scale.

(c) The marks or the auxiliary scale shall be collinear (passing through the same vertical planes) with the graduations of main scale to within ± 0.1 mm.

(d) The width of the graduation marks shall be not more than one hundred micrometres.

(e) The graduation marks representing centimetres shall be longer than those representing half centimetres.

(f) The length of the graduation marks shall be not less than:

3 mm for cm marks, and One of the ends of the marks shall lie on a straight line.

(g} The centimetre graduation marks shall be numbered in the increasing order of numeration.

(h) The height of the numerals and the letters shall be approximately 3 mm.

The error on the length between any two graduation marks on the secondary standard metre bar, at the standard temperature of 20°C, shall not exceed the value "e" calculated according to the following formula:

Where L Is the nominal lengthin millimetres of that part of the metre bar between the two graduation marks, the error on which is being determined. The calculated value of"e" shall be rounded to the nearest integer.

7. Inscription The metre bar shall bear the following inscriptions:

(a). the words "SECONDARY STANDARD METRE

BAR'',

(b) an Identification number of the secondary standard metre bar,

(c) the name of the manufacturer, .i • • l . ? ' • D H • • ... ... ..

Q • ,> • ? ;, .• u H I SECONDARY $TANOARO METTIE BAR FIGURE •2

2. Material Secondary standard capacity measures shall be cast out of admiralty bronze of the same composition as is employed In the case of secondary standard weight.

3. Shape

(a) The secondary standard capacity measure of five litre shall be cylindrical and have its inside diameter equal to the height of the measure. This shall have two handles attached securely to its sides.

(b) The measure of 2 I and below shall be of the same shape as above but shall not have any handles.

(c) The denominations of the secondary · standard capacity measures shall be engraved on the outside surface.

(d): Each secondary standard capacity measure shall be provided with a specially selected striking glass on the measures and glasses shall be securely packed in velvet lined teakwood boxes.

(d) the material of the metre bar,

(e) the words, figures and letter "STANDARD AT 20°C",

(f) the year of manufacture,

(g) the mark of verification on the plate of the carrying case of the metre bar.

8. Protective and carrying case

(a) The metre bar shall be housed In a case made from suitable material and provided with a handle, fined internally with velvet,a plastic material or any other material, and in such a way that the measure Is not likely to be damaged; particularly by shocks or corrosion.

(b) The case shall have affixed on It a plate bearing the Inscription "SECONDARY STANDARD METRE BAR" and the identification number.

Note: The existing secondary standard metre bars may differ In minor details in regard to setting fines and inscriptions, etc.

MEASURES

l. Denominations

4. Maximum permissible error Kilogram series Gram series MJ1/igramseries 500ml 200ml 100ml 50ml 20ml Denomination ·

5. Protective and carrying cases These capacity measures shall be stored in their boxes made from teakwood or any other suitable non· corrosive material with proper housing lined with velvet, chamois leather or soft plastic material. Wood used in such boxes shall be reasonably free from resins and volatile materials. Glue may not be used for fixing velvet or such other materials. Each capacity measure shall be housed in such a manner so as to avoid their excessive movement during transit.

Each striking glass of the capacity measure shall be securely housed in proper grooves so as to protect them from breakage during transit.

6. Inscriptions The boxes containing these capacity measures shall have the following inscriptlons:-

(a) the Inscription SECONDARY STANDARD CAPACITY MEASURES;

(b) the Identification number of secondary standard capacity measures;

(c) the name of the manufacturer;

(d) the year of manufacture;

(e) the mark of verification of properverification authority.

THIRD SCHEDULE

DENOMINAnONS, MATERIAL, SHAPE AND

PERMJSSIBLE ERRORS IN RESPECT' OF WORICING

STANDARDS

PARTI· WORKING STANDARD WEIGKTS s. Denominations so Litre series (1)

2. Material

(a) Weights.of 2o·kg to 1 g shall be cast from admiralty bronze (88 Cu, 10 Sn, 2 Zn) or nickel chromium alloy (80 NI, 20 Cr) or

(b) Weights of:S00mg to 100 mg shall be made from admiralty bronze (rolled) (88 Cu, 10 Zn, 2 Sn) sheets or from the sheets of nickel chromium ,alloy (BO Ni 20 Cr) or austenitic stainless steel (25 Ni, 20 Cr) or (20 Ni, 25 Cr).

(c) Weights of 50 mg to 1 mg shall be made of aluminium sheets. Copper, silicon and iron contained as impurities in the aluminium shall not exceed 0.3 per cent in the aggregate.

3. Shape and finish

(a) Weights of 20 kg and 10 kg shall be cylindrical In shape and shall be cast in two parts, the top part being screwed snugly into the bottom part. The top part shall be cast in the form of a handle for lifting purposes.

The two parts after assembly shall be locked by means of a set screw over which the seal of the verifying authority shall be affixed.

(b) Weights of 5 kg to 200 gm (inclusive) shall be cast In two parts, the top part being screwed snugly into the bottom part. The top part shall be cast in the form of a knob for lifting purposes. The two parts, after assembly, shall be locked by means of a set screw, over which the seal of the verifying authority shall be affixed.

(c) Weights of 100 g to 10 g (inclusive) shall be as in (b) above except that there shall be no lockingarrangement.

(d) Weights of 5 g to 1 g (inclusive) shall be integral weights with knob.

(e) Weights of 500 mg to 1 mg (inclusive) shall be of square shape with the one of the sides bent at right angles to the flat surface for ease of handling.

(f) The denominations shall be marked on the weights.

(g) The entire surface of the weights, including their base and corners shall be free from roughness.

The surface of the weights, when inspected visually, shall not show any porosity and shall have a mirror polish appearance.

The permissible errors in excess and in deficiency shall be as follows:- 20 kg 300 10 kg 150 . 5 kg 75 2 kg 30 1 kg 15 500g 7.5 200g 3.0 100g 1.5 .

50g 1.0 20g 0.8 10g 0.6 5g 0.6 2g 0.4 lg 0.3 500mg 0.25 200mg 0.20 100mg 0.15 50mg 0.12 20mg 0.10 10mg 0.08 5mg 0.06 2mg 0.06 1 mg 0.06

(a) These weights shall be stored in their boxes made from teakwood or any other suitable non-corrosive material with proper housing lined with chemically neutral velvet, chamois leather or soft plastic material. Wood used In such boxes shall be reasonably free from resins and volatile materials. Glue shall not be used for fixing velvet or such other material. The weights shall be housed in such a manner so as to avoid their movement during transit.

(b) Each milligram weight shall be provided with a separate housing. A covering glass or a sheet of any other transparent, non-reactive and non-corrosive material shall be provided so as to ensure that these weights are not dislocated during transit.

(c) A suitable device for lifting the kilogram and gram weights, covered with chamois leather or other sultafllematerial, shall be provided.

A pair of forceps capable of lifting easily milligram weights shall also be provided.

6, Inscription The boxes containing the weights shall have the following inscriptions :-

(a) the words 'WORKING STANDARD WEIGHTS',

(b) the identification number of the working standard weights,

(c) the name of the manufacturer,

(d) the year of manufacture,

(e) the marks of verification.

1, Material The working standard metre bar (hereinafter I called metre bar) shall be manufactured from SB per I cent nickel-steel, or austenitic stalnless steel, or I stainless steel with 13 per cent chromium or pure 1 nickel (minimum purity 99 per cent). I 2, Shapeanddlmenslons t'(a) The metre bar shall have a rectangular cross section of minimum dimensions 20 mm x 10 mm. The existing cross-section with dimensions 30 mm x 15 mm shall be preferred.

(b) The overall length of the metre bar shall be 1030 ± 1 mm and the graduated length shall be 1010mm.

(c) Ungraduated length of 10 mm shall be left after the last graduated marks.

3. Finish The graduated surface shall be bright, nicely polished and free from surface irregularities In the neighbourhood of the graduation marks.

4. Graduations

(a) The metre bar shall be graduated in millimetre throughout from O to 1000 mm on the wider upper surface.

(b) A length of 10 mm before the zero graduation mark shall also be graduated In millimetres.

(c) The scale shall be regular. The thickness of · the graduation marks shall be uniform and shall lie between 30 and 80 micrometres.

(d) The width of the graduation marks shall be uniform to within± fifteen per cent of the average width of all the marks.

(e) The graduation marks representing centimetres shall be longer than those representing half c-entlmetres and the graduation marks representing half centimetres shall be longer than those representing millimetres.

(f) Each graduation mark shall be straight to within ten micrometres over its length.

(g) The graduation marks shall be parallel to one aiwther to within ten micrometres.

(h) The length of the graduation marks shall be not less than--

(1) The centimetres graduation marks shall be numbered in the Increasing order of numeration.

(j) The height of the numerals and the letters (symbols) shall be approximately 3 mm.

(k) The graduation marks shall be square to the scale axis to within 30 minutes of arc.

5. Cursor

(a) The errors on i?elength measure under .verlflcatlon shall be determined by means of a scale marked on a plate, made from transparent material, whkhis carried by a cursor capable of moving along the length of the metre bar. The plate shall have appropriate and constant dimensions and thickness.

(b) The scale on the plate shall:

(I) either be a length of 9 mm divided into 10 parts thus forming a Vernier scale to read the errors to the nearest of 0.1 mm; or (Ii) one millimetre divided into 10 parts for reading the errors directly to the nearest of 0.1 mm.

(c) T]:le thickness of the graduation marks on the scale shall be less than that of the graduation marks on the metre bar.

(d) The graduation marks on the scale shall be Inscribed on the surface facing the graduation marks on the metre bar.

(e) The readings shall be taken by means of a magnifying glass, the magnification of which shall be not less than SX if the scale is graduated in 0.1 mm and not less than 3X If the scale is of Vernier type.

STANDARD METRE BAR" and the Identification number.

Note : The existing working standard length measure (metre bars) may differ in minor details in regard to Inscriptions, etc. on it.

PARTW-WORKING STANDARD CAPACITY

MEASURES

2. Material Working standard capacity measures shall be pressed out of oxygen free, deoxidized annealed copper sheets of deep drawing quality.

3. Shape

(a) Working standard capacity measure of 10 litres shall be cylindricaland have its Inside diameter approximately equal to the height of the measure. This shall have two handles attached securely to its sides.

(b) Working standard capacity measures of 5 lltres and below shall be of the same shape as above but shall not have any handles.

(c) The outside of the body of the working standard capacity measures shall be oxidized to give a smooth dull black surface and the inside shall be tinned.

(d) The denominations of the working standard measures shall be engraved on the outside surface.

(e) Each working standard capacity measure shall be provided with specially selected striking glass and the measures and glasses shall be securely packed in velvet lined teakwood boxes.

4. Maximum permissible error

(f) The cursor shall 'be such that lt would be possible to move it smoothly without jerks, along a straight line from one end of the measure.to the other.

(g) A mechanism to raise, tower and .laterally move the measure under verification, within a view to putting its graduated surface at a proper level and aligning its zero mark with that of the metre bar shall be provided.

(h) For facilftating the verification of end measures, two vertical stops bearing reference lines shall be provided. The first stop shall be.such that its reference line can be aligned with the zero mark of the metre bar. The second stop shall be capable of moving along the entire length of the metre bar.

6. Maximum permissible errors

(a) The error on the length between any two graduation marks on the working standard lengthmeasure, at the standard temperature of 20"C, shall not exceed the value "e" calculated according to the following fonnula:

where Lis the nominal length in millimetres of that part of the metre bar between the two graduation marks, the error on which is being determined. The calculated value of "e" shall be rounded to the nearest Integer.

(b) The errors on the length between any two graduation lines on the plate shall not exceed ± 20 micrometres.

7. Insaiption The metre bar shall bear the followingInscription:

(a) the words "WORKING STANDARD METRE BAR';

(b) identification number of the metre bar,

(c) the name of the manufacturer,

(d) the material of the metre bar,

(e) the words, figures and letter"STANDARD AT 20°C",

(f) the year of manufacture.

8. Protective and carrying case

(a) The standard metre bar shall be housed in a case made from suitable material and provided with a handle, lined Internally with velvet, a plastic material or any other material and in such a way that the metre bar is not likelyto be damaged, particularly by shocks or corrosion.

(b) The case shall have affixed on it a plate bearing the inscription "WORKING 1, · Denomination Litre series (I) 10 litres 5 litres 2 litres 1 litre 500ml 200ml 100ml 50ml 20ml Permissible error in ml± ml Denomination Deliverytime Permissible error ( + ml)

5. Pipette measures Pipettes of the followingdescription may also be used as working standard measures :

(a) One mark pipettes of capacities 10 ml and 5 ml.

(b) Graduated pipettes of capacities 5 ml graduated at every tenth of m I.

6. Delivery time and maximum permlsslble errors of pipette measures These capacity measures shall be stored in their boxes made from teakwood or any other suitable non­ corrosive material with proper housing lined with velvet, chamois leather or soft plastic material. Wood used in such boxes shall be reasonably free from resins and volatile materials. Glue may not be used for fixing velvet or such other materials. Each capacity measure shall be housed in such a manner so as to avoid their excessive movement during transit.

Each striking glass of the capacity measure shall be securely housed In proper grooves so asto protect them from breakage during transit.

7. Protective and carrying cases

8. Inscriptions The boxes containing these capacity measures shall have the following inscriptions:

(a) the words "WORKING STANDARD CAPACITY MEASURES",

(b) the identification number of the capacity measures,

(c) the name of the manufacturer,

(d) the year of manufacture,

(e) the mark(s) of verification of proper verification authority.

FOURlli SCHEDULE

SPECIFICATIONS FOR STANDARD EQUIPMENT

[See Rules 7, 8 and 9]

PARTJ-REFERENCE STANDARD BALANCES

1. Every reference standard balance shall be of such robust construction and have such metrological qualities so as to ensure the continued good performance, as indicated In paragraph 2.

2. Sensitivity figure/readability and precision of measurement of every reference standard balance shall be such as to give overall precision of measurement of 1 part in one million for weights from 10 kg to 10 g and± 0.01 mgfor weights from 5 g to 1mg.

PART JI-SECONDARY STANDARD BALANCES

I, Every secondary standard balance shall conform as regards capacity, sensitivity figure In mg per division, minimum scale division, variation In sensitivity figure with respect to load and overall accuracy of measurement, to the specifications as indicated below :

Minimum Maximum s s (Graduated) mg/div. In sensitivity figure accuracy of with respect to load measurement the standard deviation of the 10 consecutive rest pointsfor every secondary standard balance shall not be more than one scale division.

336 THE .GAZETTE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)]

3. The1devlation·lnarm ratio from uriity, for every secondary standard equi-armbalance shall not be more than.a fraction.equal .to sensitivity figure divided by full load (both being taken'in the same unit).

4. The variation in time .periods at different loads for every secondary standard .balance shall not be more than 20 per.cent.

5. Every-secondary·standard 'balance shall be provided with a:device so rhatthe contact between the knife-edges andttheir.respective planes is broken when the belancelsjn arrested position.

The •secondary standard balance shall, ordinarily, be used for indoor work in laboratories.

7. Every secondary standard balance of digital type shall conform as regards value of verification scale interval as given below:- capacity Maximum value Type of weights of verification to be verified scale interval

1. Working standard balances may be of the following two types:-

(a) Equi-arm types balances;

2. Every working standard balance of equl-arm type shall conform, as regards capacity, sensitivity figure, maximum variation In sensitivity figure with respect to load and maximum overall inaccuracy of measurement to the specification as Indicated below- Capadty Max. Sensitivity Maximum variation Minimum overall accuracy of figure/division in sensitivity figure measurement 2.1 The standard deviation of ten consecutive rest points for every working standard balance shall not be more than one scale division.

2.2 The deviation in arm ratio from unity, for every workingstandard equt-arm balance shall not be more than the fraction equal to sensitivity figuredivided by the full load (both being taken in the same unit).

3. Every working standard digital type balance shall conform, as regards value of verification scale Interval as given below:- capacity Max. value of Type of weights verification scale to be verified interval and 20 kg 5 kg;

Non-bullion : 20 kg 500g;

200g below;

Non-bullion : 200 g and below

4. The standard deviation of the 10 consecutive rest points for every working standard balance shall not be more than one scale division.

S. The deviation in arm ratio from unity, for every working standardequi-arm balance shall not be more than a fraction equal to sensitivity figure divided by full load (both being taken in the same unit).

6. The variation in time periods at different load for every working standard balance shall not be more than 20 per cent.

7. Every Indoor type working standard balance shall be provided with a device so that the contact between the knife-edges and their respective planes is broken when the balance is in arrested position.

Note: For verification of bullion or carat weights, only Indoor type working standard balances shall be used.

FIFTH SOfEDULE [5ee Rule 11]

PART-I

Weights (Other than Carat Weights} General This Part deals with the following categories of weights:-

(a) The dimensions of the two types of weight shall be as specified in Tables 1 and 2.

(b) The tolerances on dimensions shall be ±5 percent.

disc. The screwed brass plug shall be provided with a screw driver slot and the brass disc shall have a central hole to facilitate lifting.

(Iii) The plug or a disc shall be sealed by means of a lead pellet pressed firmly into an internal circular slot or in the · threaded part of the tube.

(I) The loading hole shall be cast in one of the upper surfaces of the weights and shall open out. on the upper surface (See Figure 4).

(II) This loading hole shall be closed by a plate cut from m lid steel.

(111)The mild steel plate shall be closed by a lead pellet pressed firmly Into the conical hole.

(b) In case of new weights, about two-third of the depth of the loading hole shall remain empty after adjustment.

5. Markings

(a) The denomination of the weight and the marker's or manufacturer's name or trade mark shall be indicated Indeliblyin the sunken form or in relief, on the upper surface of the central portion of the weight. (See figure 3 and Figure 4.)

(b) The denomination of the weight shall be Indicated in the International form of Indian numerals in an indelible manner with the symbols as illustrated below: · Note:The abbreviation q or fi!;m,may be indicated In the regional script.

6. Dimensions (A) Iron weights, paralleloplped (50 kg to 5 kg) (B) Cylindricalknob type weights (10 kg to lg) '(C) Iron weights, hexagonal (50 kg to 50 g) (D) Bullion weights (10 kg to 1 g) and (E) Sheet metal weights (500 mg to 1 mg) A.-IRON WEIGHTS PARALLELOPIPED (50 kg to 5kg) 1, Denominations Paralleloplped Iron weights shall have the following denomlnatlons:- Kilogram series : 50, 20, 10 and 5.

2, Shape

(a) The weights shall be integral and in the form of parallelopiped rectangles with corners rounded off and having a rigid handle for ease of handling.

(b) The shapes shall be as shown either in Figure 3 or in Figure 4.

3. Material

(a) Body: The body shall be made or manufactured from grey cast Iron.

(b) Handles: Handles shall be made or manufactured from the followingmaterials:

(i) Type 1 weights-Steel tube without soldering

(ii) Type 2 weights-Cast along with the body

(c) Method of manufacture:

The weights shall be made or manufactured by means of any suitable foundry and moulding process.

4. Loading holes

(a) The weights shall be provided with loading holes of either Type 1 or Type 2 Indicated below:

Type! loading hole

(i) The loading hole shall be located within the tube which forms the handle (See Figure 3).

(ii) The loading hole shall be closed either with a screwed brass plug or a brass Paralleloplped Weights Dimensions for Type 1 Weights (In milbinetres) 5kg 150 152 75 77 84 36 30 6 66 12/20 10kg 190 193 95 97 109 46 38 8 84 12/20 20kg 230 234 115 117 139 61 52 12 109 24/32 50kg 310 314 155 157 192 83 74 16 152 24/32 Sides A and A' as also B and B' may be Inversed.

TABLE 2

Parallelopiped Weights Dimensions for 'Type2 Weights.

(In millimetres) 5 kg 150 152 75 77 84 36 30 6 66 19 5 12 16 13 55 10kg 190 193 95 97 109 46 38 8 84 25 6 16 35 25 70 20 kg 230 234 115 117 139 61 52 12 109 29 8 20 so 30 95 50kg 310 314 155 157 192 83 74 16 152 40 10 25 70 40 148 Sides A and A' also B and B' may be Inversed.

r-'-i ?fACTUllERSNAME OR

ADE MAU

L .. - -..J

PARALLEL PIPED WEIGHT TYPE I

F=?=-? ,'.__? l eos·.·.·. ,=·····,·· ··-· ,.-.·· C:.f. .

VIJIJlm' I ', µ:j T Ma facturer's Name or Trade Mark"'" nu a ?1--C-,--- A' I"? 0I I l i I I L._.J I A J

(a) Weights of denominations 10 g to 1 g both Inclusive, shall be solid, integral weights without a loading hole.

Parallelepiped Weight Type 2 Figure 4 lg)

1. Denominations Cylindrical weights shall have the following denominations :

Gram series: 500, 200, 100, SO,20, 10, 5, 2 and 1

2. Shape

(a) The weights shall be integral and cylindrical In shape and provided with a flattened knob for ease of handling.

(b) The shapes shall be as shown in Figure (5).

3. Material The weights shall be made or manufactured from brass, gun metal or bronze; grey cast iron may also be used for weights from 10 kg to 200 g but grey cast iron weights shall not be used for weighment of gold, silver, precious metals or their products.

4. Method of manufacture The weights shall be made or manufactured by any suitable method as may be applicable to the selected material.

5. Loading hole Permissible error Verification Inspection 50kg 20 kg 10kg 5kg Denomination The maximum permissible errors shall be as specified below :

7. Finish The weights shall be finished smooth and be free from dross, pits, blow-holes and other defects.

They shall be protected against corrosion by applying an appropriate coating which is resistant to normal usage and wear and tear.

9. Stamping The Legal Metrology Officer's seals shall be stamped on the lead pellet within the loading hole.

(See Figure 3 & Figure 4).

inclusive, shall be provided with a loading hole.

(c) The loadinghole shall be cylindricaland shall pass through the axis .of the weight open out on the upper surface of the knob and have wider diameter at its upper end as shown In Figure 5.

(d) The loading hole shall be closed either by means of a threaded brass plug or a flat brass disc. (See Figure 5).

Note: Thethread used shall be that commonly known as 'ISO Metric'.

(i) The threaded plug shall have a slot for adjusting it by means of a screw driver.

(ii) The flat disc. shall be provided with a suitable hole in the centre to facilitate handling.

(e) The plug or the flat disc shall be closed by means a lead pellet pressed flrmly Into the circular groove In the wider part of the loading hole. ·

(f) .· Weights without a loading hole shall be adjusted by machining or grinding.

(g) Weights with loading hole shall be adjusted with heavy metallic materials such as lead shots.

(h) In the case of new weights about two-thirds of the depth of the loading hole shall remain empty after adjustment.

6. Marking

(a) The denomination of the weight and the maker's or manufacturer's name or trade mark shall be indicated indelibly, in the sunken form or in relief, on the flat knob.

(See Figure 5).

(b) The denomination of weights of 10 kilograms to 500 grams may also be indicated on the cylindricalbody of the weight, provided that the numerals and letters of the symbol shall be larger than those used for indicating them on the knob.

(c) The denomination of the weight shall be Indicated in the international form of Indian numerals in an indelible manner with the symbols as illustrated below :

m or mri 100 g Note: The abbreviation?' fi.im,m or mri may be Indicated in the regional script.

7. Dimensions (a} The dimensions of cylindrical weights shall be as specified in Tables 3 and 4.

(b) The tolerances on dimensions shall be :

(I) for weights 1 kg. and below± 10 per cent;

(II) for weights above 1 kg ± 5 per cent.

TABLE 3

CylindricalKnob 7ypeWeights-Dimension for Weights in mm.

10 kg 100 90 58 According 17 15 3 10 5 kg 80 72 46 to 13 12 2 10.

2 kg 60 54 36 · material 10 9 2 5 1 kg 48 43 27 8 7 2 5 500 g 38 34 22 6 5.5 1.5 3.2 200 g 28 25 16 4.5 4 1.5 3.2 100 g 22 20 13 4 3.5 1 ·2 50 g 18 16 10 3 2.5 1 2 20 g 13 11.5 7.5 2 1.8 0.5 1.5 10 g 10 9 6 1.6 1.5 0.5 1 Without 5g 8 7 4.5 1.4 1.25 0.5 1 loading 2g 6 5.5 3 1 0.9 0.5 1 hole 1 g Cylindrical Knob Type Weights-Dimension for Loading Hole Variety I and U In mm. 20 g 3 18 5.5 2.5 6.5 1.5 1 9 M4 x 0.5 5 1 5 5 1 100 g 4.5 30 7.5 3.5 9 2 1 10 M6 x 0.5 5 1.5 7 7 1.5 j ,/ ? r ·,,..

p • p ? r u -? • N

I, I I

I ---i---=::::-:;,,

FIGURE-I

·.•·a ffHE'GAZETTE OF INDIA: EXTRAORDINARY 8, Finish The weights shall be polished smooth. They may be protected against,corrosion by applying an appropriate coating.which is resistant to normal usage and wear-and tear.

9, Permissible error The maximum permissible -errors shall be as specified below :

10, Stamping

(a) The Legal Metrology Officer's seals shall be stamped on the load pellet within the loading hole, where loading hole is provided.

(b) The Legal Metrology Officer's seals shall be stamped on the bottom of weights which have no loading hole.

1, Denominations Hexagonal Iron weights shall have the following denominations :

Gram series : 500, 200, 100 and 50.

Kilogram series : 50, 20, 10, 5, 2 and 1.

2, Shape

(a) The weights shall be integral and hexagonal.

The shape shall be. as shown In Figures 6 and 6A,

(b) The weightsof denominations of 50 kg and down to and Including 5 kg shall be provided with cast-In handles made of mild steel.

Denommafion ·10 kg 5 kg 2 kg 1 kg 500 g 200 g 100 g 50 g 20 g 10 g Sg 2g 1 g Pemussibte error :verification Inspection

(c) The weights of denominations 2 kgand down to and Including 50 g shall nest with each other.

3, Material The ·weightsshall be made or manufactured from grey cast Iron.

4. Method of manufacture The weights shall be made or manufactured by means of any suitable foundry and moulding process.

5. Loading hole The weights must have a loading hole formed at the foundry

(a) For weights in Figure 6, this hole must be In the shape of a right circular cone located axially and opening into the bottom face of the weight with its smaller diameter.

(b) For weights in Figure 6A, this hole must be In the shape of a frustum of a pyramid with rectangular base and opening into the bottom face of the weight with Its smaller end.

(c) In the case of new weights about two-thirds of the depth of the loading hole shall remain empty after adjustment.

6. Marking

(a) The denomination of the weights and the maker's or manufacturer's name or trade mark shall be indicated indeliblyin the sunken forp, or in relief, on the upper surface of the central portion of the weight (See Figure 6).

(b) The denomination of the weight shall be Indicatedin the international form of Indian numerals in indelible manner with the symbols as illustrated below {See Figure 6).

Note : The abbreviation f.l;i;it,f.fim, '!IT or '!11'1 may be Indicated in the regional script.

7. Dimensions

(a) The dimensions shall be as specified In Tables 5 and SA.

(b) The tolerances on dimensions shall be :

(I) for weights 1 kg and below± 10 per cent

(ii) For weights above 1 kg ± 5 per cent.

TABLES

Dimensions for cast Iron or Forged Mild Steel S Weights (Alldimensions In millimetres) 2kg 94 101 78 41 10 34 30 9 18 4 1 kg 73 79 62 34 8 32 28 8 16 4 500g 57 62 47 27 6 23 20 6 13 3 200g 42 48 38 21 6 22 20 4 9 3 100g 33 38 31 17 5 18 16 3 7 2.5 50g 27 31 24 u· 3 16 14 3 5 2

TABLE SA

Dimensions of Cast Iron Weights with Cast-in Handles (Dimensions In mm) 50kg 236 253 134 170 100 27 58 48 24 102 32 20 kg 188 200 112 113 90 21 44 38 19 66 22 10 kg 152 161 92 88 74 18 36 30 15 54 19 5kg 125 132 75 65 62 15 29 25 12 40 16

8. Finish The weight shall be finished smooth and be free from pits, blow-holes and other defects. They shall be protected against corrosion by applying an appropriate coatlng which is resistant to normal usage of wear and tear.

9, Permissible error The maximum permissible errors shall be as specified below ;

10. Stamping The Legal Metrology Qfficer's seals shall be -stamped on the lead pellet within the loading hole (See Figure 6).

1, Denominations Bullion weights shall have the following denominations ;

Gram series; 500,200, 100, 50, 20, 10, 5, Zand 1.

KIiogram series : 10, 5, 2 and 1.

ito? ,---___,,,,_.a..:..----··"'." Permissible error Verification Inspection 50kg 20kg 10kg 5 kg 2 kg 1 kg 500g 200g 100g 50g Denomination bottom face of the weight with its smaller diameter (See Figure 7).

(d) In the case of new weights about two-thirds of the depth of the loadinghole shall remain empty after adjustment.

6. Markings

(a) The denominations and other marking on cylindrical knob type weights shall be as specified in paragraph 15 of this Part.

(b) Cylindrical knob type weights of denomination 100g to lg, both inclusive, shall be marked on the bodywith a 'diamond' and those of denominations 10 kg to 200g, both inclusive, shall be marked on the knob with the words 'Bullion' and (?) within a 'diamond'.

(c) The denominationsofflatcylindrical weights and the maker's or manufacturer's name or trade mark shall be Indicated indelibly, in the sunken form or In relief, on the upper surface of the central portion of the weights (See Figure 7).

(d) Flat cylindrical weights of denominations 10 g to 1 g, both inclusive, shall be marked with only a 'diamond'. and those of denominations 1 kg to 20 g, both inclusive, shall be marked with the words 'Bullion' and(?) within a 'diamond'.

(e) The denomination of the weight shall be Indicated in the international form of Indian numerals in an indelible manner with the symbols as illustrated below (See Weights sball 'be either c.ast, pressed or turned from rods, or :made or manufactured by any other suitable method as may be applicable to the selected material.

(a) Weights of denominations 10 kgto 20 g, both inclusive, made or manufactured according to requirements specified in paragraph 11 of this Part, shall have loading holes of the type specified for them.

(b) Weights of denominations 10 g to 1 g, both incluslve of either type shall be solid Integral weights without a loading hole.

(c) Flat cylindrical weights from 1 kg to 20 g both lnclusive, shall have loading holes, in the shape of a right circular frustum of a cone located axially and opening Into the

2. Shape Bullion w?jghts shall be or.the followi?g ,,two types:

weights of denomination 10 kg to 1 g, both inclusive, shall be-of.the shape as specified in pa?graph:B,2ofthisPartlSeealsoflgure

5) but.shall bear .Indlcations,specified In parag?ph.6 to lndlcate'that-they are bullion weights.

weights of,denominations 1 kg to 1 g both induslve,,shall be -flat cylindrical In shape, without a:knoband shall nest with each other (See Flgure7).

3. Material Weights shall be made or manufactured from brass, gun metal, bronze or the like,

4. Method ohnanufacture

DIMENSIONS FOR FLAT CYLINDRICAL BULLION WEIGHTS

(All dimensions in millimetres) 1 kg 80 61.5 20 23 4.0 12 26.6 200g 48 37.5 14 16 2.0 7 14.8 100g 37 28.5 12 14 2.0 6 12.7 50g 28 21.5 10 11 1.5 3 11.0 20g 21 16.5 9 10. 1.5 3 8.4 10g 16 12.5 ** ** 1.5 ** 6.9 5g 12 9.5 ** ** 1.0 ** 5.9 2g 9 7.0 ** ** 1.0 ** 4.4 lg 6.5 ** ** ** ** ** 3.6 200g 10 ±10 100g 5 ±5 50g 3 ±3 20g 2.5 ±2,5 10g 2.0 ±2,0 5g 1.5 ± 1.5 2g 1.2 ±1.2 lg 1.0 ± 1.0 -ce-- Shape after bending along one of the sides Equilateral triangle Square Regular hexagon Denomination (mg) 3, Material Sheet metal weights shall be made or manufactured from brass, stainless steel, aluminium nickel-sliver or cupro-nickel sheets.

4. Method of manufacture Sheet metal weights shall be made or manufacture by pressing or by any other suitable process.

5. Markings

(a) Sheet metal weights shall bear only the denomination and symbol for 'milligram' as · 10. stamping

(a) The Legal MetrologyOfficer's seals shall be stamped on the lead pellet within the load Ing hole, where loading hole is provided .

(b) The Legal Metrology Officer's seals shall be stamped on the bottom of weights which have no loading hole.

1, Denominations Sheet metal weights shall have the following denomlnatlons:- Mllllgramseries: 500, 200, 100, 50, 20, 10, 5, 2 and 1.

z, Shape

(a) Bullion weights shall be circular in shape and shall have one edge bent for ease of hand IIng (See Figure 8).

(b) Non-bullion weights shall have the following shapes and shall have one edge bent for ease of handling (See Figure 9).

Inspection (mg) Permlsslble error Verification (mg) 10kg 5 kg 2kg 1 kg 500g Denomination I r-----A 0 ----­ r----e 0 ---., Figure - 7 Note : The abbreviation fli;<'!I,1ll;m,m or 'llTt! may be indicated In the regional script.

7, Dimensions

(a) The dimensions of cylindrical knob type weights shall be as specified In Tables 3 and

(b) The dimensions of flat cylindrical weight shall be as specified in Table 6.

(c) The tolerances on dimensions for both types of weights shall be-

(i) for weights 1 kg and below± 10 per cent.

(ii) for weights above 1 kg ± 5 per cent.

8. Finish The surface of the weights shall be polished, smooth and shall not show any porosity to the naked eye.

9, Permissible error The maximum permissible errors shall be as specified below :

346 .THE GAZETTE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)] .DIMENSlONS FOR SHEET METAL WEIGHTS (NON-BULUON) (Figure 9) (All dimensions In millimetres} (mg) indicated below (See also Figure 8 and (firnt) 500 mg

TABLES

DIMENSIONSFORSHEETMETAL WEIGHTS

(Alldimensions in millimetres)

7. Finish The sheet metal weightsshall be clearly sheared and free from burrs. The stamped markings on sheet metal weights shall be legible and deep enough to ensure indelibllitybut not so deep as to crack the sheet metal weights.

8. Permlsslble error The maximum permissible errors shall be as specified below :

D C H

500 mg 200 mg 100 mg 50 mg 20 mg ·10 mg 5 mg 2 mg 1 mg Denomination

(b) ·The tolerances on dimensions shall be ± 10 per cent.

(a) The dimensions of sheet metal weights shall be as specified in Tables 7 and 8.

(b) The maker's or manufacture's name or trade mark shall be indicated indeliblyon the box containing the sheet metal weights.

· (c) The box shall also bear a serial number to identify it.

6. Dimensions Note :The abbreviation firnl may be Indicated In the regional saipt.

Denomination (mg) Maximum permissible error so 0.4 1.2 ±0.4 ± 1.2

9. Stamping

(a) ·LegalMetrology Officer's seals shall not be affixed on weights of 10 mg, 5 mg, 2 mg and 1 mg. These weights shall be authenticated by the Issue of a certificate of verification which shall also mention the serial number on the box containing the weights.

(b) Legal Metrology Officer's seal for year alone shall be stamped on sheet metal weights of 20 mg.

Figure 8 Sheet Metal Bulllon Weights D 500 H I I I I I J l ..

H 200

T .•.

I I I I Sheet Metal Weights 348 .THE GAZETTE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)]

(a) KNOB WEIGHTS (b) SHEET METAL WEIGHTS

PART II

CARAT WEIGHTS

(c) The Legal Metrology·0fficer'.s .seals .(namely, year, quarter and identification) shall be stamped on sheet metal weights of denominations 500 mg to '50 mg, both.

indusive.

1. General This Part deals with the requirements for carat weights intended for use in weighing pearls, diamonds and other precious stones.

2. Denominations The denominations of carat weights shall be as given below (the gram and milligram equivalents are shown against each for ·ready reference) :

3. Knob weights

(a) Materials

(i) The weights shall be made from rolled, drawn or extruded material and shall not be cast.

(ii) The weights shall be made from brass, bronze, gun-metal, nickel· chromium alloy or non-magnetic stainless steel.

{b) Shapeanddimenslons The shape and dimensions of the weights shall be as shown in Figure 10 and Table 9.

The maximum permissible errors shall be as specified below :

Denomination Equivalent Denomination Verifieatlon Inspectioncere: mg 0.05 10 so 2.0 ±2.0 0.005 I zoo 40 10 Z 5 I Denomination Equivalent carat g

NOMINAL DIMENSIONS OF KNOB CARAT WEIGKTS

[Clause 3{b)] Denominations Carat (Alldimensions in millimetres) * The cross-section of the top of the knob is elliptical for all weights major axis being twice the minor axis (therefore for all weights B= A/4) * * This Is a recommended dimension.

_[ L,.

??"'---'--'-?.L.- -?--'-'--'---? Nominal d;mens;on for sheet metal a,rat weights Denomination Size Carat mm 0.02 s Tolerance± 10 per cent Verification Inspection Denomination carat Note: With a material of density 8400 kg/m' (exactly) the above dimensions will give weights which possess masses to within the required tolerance limits on the plus side (this ensures a longer life for the weights). However, as the density of the material may vary considerably as also the manufacturing techniques, a tolerance of ±10 per cent Is allowed on all obligatory dimensions (that is those other than C).

Final values of masses can be adjusted by controlling the dimension H.

4. Sheet metal weights

(a) Materials?eights of denominations 0.2 carat and below shall be made of aluminium sheet. Weights of higher denominations shall be made of sheets of brass, aluminium, nickel-silver, nickel chromium alloy, bronze or cuprc-nkkel, {b) Shape and dimensions-Sheet metal weights shall be square with one edge bent for ease of handling {See Figure 11). They shall have dimensions given in Table 10.

The· maximum permissible errors shall be as specified below:- Figure 11 Sheet Metal Carat Weight Manufacturers Name or Trade Name

B .L

T•+ C H C Figure 10 Knob Carat Weight 350 "ffHE(GAZEITE ,OF INDIA: EXTRAORDINARY [PARTIl--SEc. J(i)] 5, Manufacture ancfllntsh

(a) The surface of '.the ·weights shall be reasonably smooth. Sheet :metal weights shall besmooth!Ysheared and shall be free from burrs.

(b) For better st.ability.and finish, the weights may be nlckel,,or,rhodium :plated.

6. Marking

(a) Everywelght,,except weights of 50 carat and lower ,denominations, shall have the manufacturer's name or trade mark and the denomination Indelibly marked on It.

(b) The denomination shall consist of the Intemalional form of Indian numeral prefixed and sl:lfflxed by the letter '<11' and 'c' respectively except that in the case of weights below 50 carat, only the numerals shall be marked. The size of numerals and letters indicating the denomination of weights shall be at least twice the size of letters Indicating the manufacturer's name or trademark.

Note :The abbreviation '<11' may be Indicated in the regional script.

(c) The marking shall be legible and deep enough to ensure indelibillty over a long period of use, but not so deep as to crack the weight itself.

7, Packing

(a) Each set of carat weights shall, In addition to the series of denomination specified under 2, consist of an additional piece of weight of 2 carat and the relevant decimal multiple of two.

(b) The weights shall be supplied In a suitable velvet-lined box. The. small sheet metal weights shall be so housed and provided with a cover of glass or any other transparent material that they will not get dislodged from their proper places. The box shall also contain a pair of forceps for lifting the weights.

PART III

STANDARD WEIGHTS FOR 15JING OF HIGH

CAPACITY WEIGHING MACHINES

1. Scope These specifications shall apply to standard weights having a nominal value equal to or greater than 50 kg, used for testing (and adjusting, where appropriate) of high capacity weighing machines In accuracy class III (medium) and class IV (ordinary), defined In the Metrological regulations for non­ automatic weighing machines.

(a) It sets forth the technical and metrologlcal requirements to which these standard weights must conform. In particular it establishes the values of the maximum permissible errors for standard weights and minimum densities as functions of the maximum number of scale divisions on the machines to be verified using these weights.

2. Nominal values The nominal value of the standard weight Is SO kg, or Of the form k X 10n kg, where k is generally equal to 1, 2 or 5, and n is whole number equal to or greater than 2.

3. Shape The standard weights must have a relatively simple shape, with no sharp edges or corners. They shall not have any cavities liable to cause a rapid accumulation of dirt. If they are intended to run on a flat surface (or on rails}, they must be equipped with roller tracks (or grooves) of limited area.

4. Basis of adjustment The standard weights must be adjusted taking the reference conditions applicable to the adjustment of standard weights as follows :

(a) standard reference density: 8000 kg/m',

(b) ambient air density : 1.2 kg/m', and

(c) equilibrium in air at 200C, without correction for air buoyancy.

The standard weights must indude one or more adjusting cavities. It must be possible to seal the closure of these cavities; the closures must be water­ tight and airtight (e.g., by means of a joint). The volume of adjusting cavities must be at least equal to 5/100 of the volume of the standard weight. Furthermore, It is desirable that, after the initial adjustment, a volume of at least 1/100 of the volume of the standard weight remains empty.

6, Material Standard weights are in general made of grey cast iron. They may be made of one or more other materials, provided the provisions of paragraph 8 are observed. The material used must be of such hardness and strength that they withstand the loads and shocks liable to occur under normal conditions of use.

7. Surface condition The standard weights may be coated with materials suitable for providing protection against corrosion by rendering their surface impermeable. This coating must withstand shocks and atmospheric conditions. Zinc-plating Is an example of a coating which meets with these specifications.

8. Metrologlcal characteristics The maximum permfssibleerror for the standard weights must not exceed 1/3 of the maximum permissible error for the corresponding load considered, on the weighing machine under verification. The absolute error for various denominations of standard weights shall be as given fn Annexure I. These maximum permissible errors for the standard weights must therefore be compatible with the number of scale divisions on the machines which they are Intend to verify.Furthermore, the density of standard weights must be such that a variation of± 10 per cent ambient air density, with respect to its reference value, does not produce a variation, tn the result of weighingthe standard weight In air,exceeding 1/4 of its maximum permissible error. By way of application of these requirements, the followingtable gives examples of the relation amongst :-

(a) the maximum number of scale divisions "n" on weighing machines under verification (assumed to be in accuracy class III);

(b) the maximum permissible positive or negative relative error on standard weights · used for initial verification of these machines;

and

(c) the corresponding lower limit for the density of the standard weights.

TABLE

Maximum number Maximum permissible Minimum of scale divisions positive or negative density •n• on weighing relative error on the kg/m' machines standard weights (accuracy class III), capable of verification with the standard weights during verification Note : Independent of the requirements concerning the density of the weights, it is desirable to obtain-particularly for reference standards or those - of a high nominal value-a density of about 8000 kg/ m3• For example, a cast Iron body may be used, which incorporates a special cavity In which a lead core may be cast, with a mass of approximately 30 per cent of the total nominal mass of the standard.

9, Inscriptions and markings Standard weights must carry their nominal value in numerals, followed by the symbol for the unit used and a verification mark.

10. Adjustment and verification Adjustmentof the standard weights must be such as to comply with the maximum permissible errors given In this specification. In particular this may be achieved In the case of adjustment by the double substitution weighing technique (Gauss transposition method, or Borda substitution method}, using as reference standards, weights having an error of less than 1/3 of the maximum permissible error for the weight to be adjusted, and as the comparator machine, a weighing machine for which the limit of repeatability error does not exceed 0.2 times of the maximum permissible error for the weight to be adjusted.

3S2 THE GAZETTE OF INDIA: EXTRAORDINARY [PARTfl-SEC. 3(i)] Note :'Standard weights used for verification of a weighing machine with "n" scale divisions may be used for the re,verlficatlon of a weighing machine with "p.n" .scale ,divisions, where the maximum permissible.error for this re-verification is "p" times (where p has a value equal to or greater than 1), the maximum permissible error on verification.

11. Dimensions The Dimensions for 500 kg and 1000 kg denominations weights shall be as given In Annexure II

ANNEXUREI

ABSOUJTE ERRORS FOR STANDARD WEIGHTS

Maximum permissible error for the standard weights Correspondingabsolute error (grams) Maximum number of scale divisions .s n ? on weighingmachines (accuracy class Ill) capableof being verified (verification) with the standard weights (see note given at clause 10)

ANNEXURED

TYPICAL EXAMPLES

This annexure contains diagrams of weights used for testing of high capacity weighing machines, which are considered suitable for use as patterns because of their design and ease of use.

RECTANGULAR STANDARD WEIGHTS

SUITABLE FORSTACKING

Dimensions (mm) ??? --=----·:?rJ ----?'+•o, _J .. ft It I i ?M 500kg 1000kg .a b C RECTANGULAR STANDARD WBGHT 1000 kg SUITABLE FOR STACKING o,

J-----,

----ii-- I o I'? ?' IE s ? ,, 'J -?-_:_- ?==-=-==--_:_c___:____:_:;.::__ __:_-_ce"'--"·=· ==--?-?===--------- 3S4 THE:GAZETTE OF INDIA: EXTRAORDINARY Sl!JITABLE FOR STACKING AND ROLLING Dimensions (mm) FOR 500 kg WEIGHT [r = 10 R = 20] Cylindricalmeasures Conical measures Dipping type Pouring type

2. Denominations The denominations of the different types of measures shall be as under :

[See Rule 12] PART I· UQUID CAPAOTY MEASURES 1, General This Part deals with two types of cylindricalliquid measures, namely the dipping and the pouring types, and one type .ofconical measures.

TABLE 11

Nominal Dimensions of Cylindrical Capacity Measures G 1 litre 500ml 200ml 100ml Conical measures Max. Min. Min.

H 100ml 50ml 20ml Cyffndricalmeasures 50ml 20ml Denominations D Dipping type Pouring type

3. Shapes and dimensions

(a) The shape and dimensions of cylindrical measures (dipping and pouring types) shall be as shown in Figures 12 and 13 and Table 11.

20 litres 10 litres 5 litres 2 litres 2 litres 1 litre 500ml 200ml 1 litre 500ml 200ml 100ml I H lltill ml L..? i I i i RIVETED j { ?LOED, i SOUlfRl:D j OURAZED I l i 11-o I i ?•••n--•'"--••••-•••-H,_, io---o----i

IWETED

IIELDED,

SOLDERED

OR BRAZED

i-----0---1 (SCHEMATIC)

MEASURES (SCHEMATIC)

.J.

(b) The shape and dimensions of conical measures shall be as shown in Figure 14 and Table 12.

NOMINAL DIMENSIONS OF CONICAL CAPACITY MEASURES

Min.

20 litres 97 388 288 208 194 390 1.00 35 86 29 30 10 litres 77 308 307 174 154 309 1.00 30 75 26 25 5 litres 61 244 245 147 122 247 0.80 25 65 24 20 2 litres 45 180 180 118 90 182 0.80 20 56 22 16 1 litre 36 143 143 95 72 145 0.63 20 45 18 16 500ml 28 114 113 74 56 115 0.63 15 35 14 12 200ml 21 84 84 53 42 86 0.63 10 24 10 8 100ml 17 66 67 41 34 69 0.63 10 18 7 8 Note 1 : All dimensions in millimetres.

Note 2 :Tolerance on dimensions± 10 per cent except in case of 10 litre and 20 litre measures for which the tolerance shall be ± 5 per cent.

4. Material

(a) Cylindricalmeasures-The bodyofcyllndrical measures shall be manufactured In one piece from aluminium alloy sheets, brass sheets or stainless steel sheets. The minimum thickness of the sheets shall be as specified in Table 11.

(b) Conical measures-The conical measures shall be fabricated from galvanised steel sheets, aluminium alloy sheets, copper sheets, brass sheets, stainless steel sheets or tinplate. The minimum thickness of the sheets shall be as specified In Table 12.

(c) The handles for the measures shall be fabricated from the same material as that used for the body.

5, Manufacture and finish

(a) Cylindricalmeasures made of brass sheets and copper sheets shall be tinned or tin-plated uniformly all over the inside as well as the outside surfaces. Conical measures made of brass sheets or copper sheets, shall be well tinned or tin-plated uniformly all over the inside when they are used for measuring commodities like milk, edible oils and such other food artlcles.

(b) The handles shall be of robust construction and shall be well formed and shaped generally as shown In Figure 12, 13 and

14. They shall be securely fixed to the body by means of riveting, soldering or brazing.

Note .t: Capacity measures when used for measuring milk shall have the handle fixed by welding, soldering or other suitable methods. Brazing so as not to leave pockets in which dirt may accumulate.

Note 2: Dipping type of cylindrical measures may also have handles substituted by two suitable but diagonally opposite brackets affixed to the walls of the measure by means of soldering, brazing or welding so as to hold the measure properly by a handle at right angles to the walls of the measures · to facilitate Its use in hot and boiled milk trade.

(c) The measures shall be free from any surface defects and indentations and shall be smoothly finished at the top.

(d) Cylindricalmeasures shall be provided with a well formed and proportioned spout to facilitate pouring.

(e) Conical measures shall be provided with a retaining lip to avoid spilling. The retaining Upshall be provided with a plug of suitable I I I C H

NAME AND

DENOMINATION

PLATE

F· ---DIA---?

RIVETED

WELDED

SOLDEERED

OR BRAZED

POURING 1YPE CONICAL MEASURE (SCHEMATIC)

material with a collar to receive the lead for the Legal MetrologyOfficer's seal. A small hole, about 5 mm in diameter shall be provided at the bottom of the retaining lipto indicate the level to which the measures shall be filled and the hole shall be located on the side at right angles to the handle. The bottom of conical measures shall be suitably reinforced.

(f) The measures shall be so designed that, when they are tilted 120 degrees from the vertical, they shall become o:impletelyempty.

(g) The finished measures shall have adequate robustness for durability.

6. Permissible error The maximum permlssible errors shall be as specified:

measures measures 20 I 100 10 I 50 500 ml 15 8 200 ml 8 4 100 ml 5 3 50 ml 3 20 ml 2 Inspection Denomination Verificatlcn In excess only Cylindrical Conical Cyllndtical Conical measures measures Excess Deficiency Excess ml Error same as Error same as in verification in verification _J Deficiency ml

7. Markjng

(a) ,Every ,cyllndr.lcalmeasure shall have the denomination and manufacturer's name or trade mark Indelibly stamped on it. In the case of conical measures, the denomination and manufacturer's name or trade-mark shall be either embossed on the body or indelibly marked on a name plate securely fixed to the body.

(b) The denominations shall be Indicated with the abbreviations 'I' and 'm' for litre; and 'ml' and 'iilm' to Indicate millilitre Note :The abbreviation 'm' or 'iilm' may be Indicated in the regional script.

The size of numerals and letters Indicating denominations on the measures shall be twice the size of the letters Indicating the manufacturer's name or trade mark.

8, Stamping

(a) Cylindrlcal a,pacity measures: The Legal MetrologyOfficer's seal shall be stamped just above the indication of the denomination of the capacity measure.

(b) Conical capacity measures: The Legal Metrology Officer's seal shall be stamped on the lead pellet provided for this purpose.

PART II

1, General This Part deals with two types of dispensing measures made of glass or transparent plastic materials, used for dispensing purposes. Conical dispensing measures of capacity 100 ml may also be used in the sale of liquor.

2. Types and denominations Dispensing measures shall be of the following types and denominations:-

3. Materials

(a) Glass measure.r-The measures shall be made from clear and transparent glass.

They shall be well annealed; free from stones, cracks and chippings; and as free as possible from blisters and other defects.

Lead glass shall not be used for the measures.

(b) Transparent plastic measures-The measures shall be made from a clear and transparent plastic material, manufactured from plasticised polyvinyl chloride or copolymer, the major constituent of which Is polyvinylchloride. The plastic materials used shall not contain any constituents known to be injurious to health and likelyto be extracted by contact with liquids.

4. Definition of capacity The capacity corresponding to any graduation marks Is defined as the volume of water at 27°C, expressed In millilitres, required to fill the measure to that graduation mark at 27°C,the observer's eye being level with the front graduation marks and the lowest point of the water meniscus appearing to touch the top edge of that mark.

5. Shape, construction, etc. of conical measures

(a) Shape-The measures shall be conical as shown in Figure 15A to 15G. The SO ml measures shall be· either tall or squat as shown in Figure lSC and 150 respectively.

(b) Construction-

(1) Each measure shall have a pouring lip. The form of the lip shall be such that, when the measure is filled with water to the highest graduation mark, the contents may be poured from the lip in a stream falling clear of the outside of the measure.

{II) Each measure shall have a base on which it shall stand vertically without rocking when placed on a horizontal surface. The size of the base shall be such that the measure, when empty, shall not fall when placed on a plane inclined at 15° to the horizontal. The bottom of the measuring space shall be uniformly rounded and shall merge smoothly Into the sides of the measure.

(Ill) The wall thickness of the measures shall be sufficient to ensure sturdy construction and shall not show any local departures from uniformity.

(Iv) The external surface of the measure shall be a cone having an included angle of not less than 13° and not more than 14°.

(v) The overall volume of the measure shall be such that when It Is filled with water to the highest graduation mark and a volume of water equal to half its nominal capacityIs.added to it, there shall be no overflow. But, the addition of a further quantity of water equal to quarter the nominal capacity shall result in water overflowing from the pouring lip.

(c) Graduatlons-

(1) The conical measures shall be graduated in accordance with Table

(ii) With the pouring dip of measure facing to the right, the front graduation marks shall be placed at right angles to and on the right hand side of a vertical line extending from above to the top graduation mark to near the base of the measure and below the bottom graduation mark.

(iii) The graduation marks shall be marked as shown in Figure lSA to lSG. The marks shall be engraved or etched · and they shall be of a uniform thickness not exceeding 0.3 mm., provided that they may taper slightly towards the ends. The graduation marks shall lie In planes perpendicular to the axis of the measure and shall be horizontal when the measure is standing on a horizontal surface.

(iv) Each graduation number shall be etched or engraved close to the end of the graduation mark to which it relates and In such a manner that It would be bisected by a prolongation of that graduation mark.

(v) The numbered graduation marks shall have the minimum length specified In Col. 7 of Table 13. The unnumbered graduation marks shall be at least two-third the length of the numbered graduation marks and dearly shorter than the numbered marks.

Details of Conical Measures Denomination Graduated Numbered Back Lowest At mark Height of lowest graduation Mark above bottom of measuring space Minimum length of mark l 2 4 5 200 50, 100, 120, 50, 100, 120, 50, 100, so 100 Every 10 ml 10, 20, 40, 60, 20, 60, 10 from 10 to BO,100 100 100ml from 10 to 50 ml 50 (Squat) Every 10 ml 10, 30, so 30, so 10 from lOto 50ml 20 Every 5ml 5, 10, 20 10, 20 5 from 5 to 20ml from 2 to 10ml 5 Every ml 1, 3, 5 3, 5 1 from 1 to 5ml 4.0;t0.5 1.5 2.0;t0.5 1.5 {vi) The height of. the lowest.qraduatlon merk-above.the-iowest ,point of the 2000ml ?ml i '100:ml 50ml (Tall) bottom of the measuring space shall be within the limits given in Col. 6 of Table 13.

{SQUAT)

I WFJ

Ji

(d) Permissible errors-The maximum permissible errors on verification or on inspection shall be as specified below (in ml):

Measures except SO ml (Squat) SO ml (Squat) measures Capacity corres­ ponding to graduation mark Note :The permissible errors, apart from those of the 50 ml squat measure, apply to graduation marks corresponding to the capacities stated, irrespective of the nominal capacity of the conical measure concerned.

6. Shape a,nstruction, etc. of beaker measures

(a) Shilpe-The measure shall be in the form shown in Figure 16A and 168.

{b) Construction--

(i) Each measure shall be provided with a pouring lip. The form of the lipshall be such that, when the measure Is · filled with water to the highest graduation marks, the contents may be poured from the lip in a stream falling clear of the outside of the measure.

(ii) Each measure shall be provided with a base on which it shall stand vertically without rocking when placed on a horizontal surface. The size of the base shall be such that the measure, when empty, shall not fall when, placed on a plane inclined at 15° to the horizontal. The bottom of the measuring space shall be uniformly rounded and shall merge smoothly into the sides of the measure.

(iii) The overall volume of the measure shall be such that when the measure is filled with water to the highest graduation mark and a volume of water equal to quarter the denomination volume is added to it, the water shall not overflow.

(i) The graduation rnerks shall be marked as shown in Figures 16A and 16B and Table 14. The marks shall be etched or engraved and shall be of a uniform thickness not exceeding 0.3 mm, provided that they may taper slightly towards the ends. The graduation marks shall lie in places perpendicular to the axis of the measures and shall be horizontal when the measure is standing on a horizontal surface.

(ii} Each graduation numbered shall be etched or engraved close to the end of the graduation mark to which it relates and in such a manner that it 1000 ml would be bisected by a prolongation of that graduation mark.

(iii) The distance between the highestand the lowest graduation marks and the height of the lowest graduation mark above the Inside of the base of the measuresrall be In ao::ordarcewith Cols.

(3) and(4) respedivel'/ oflable 14.

(d) Permissible envl'-The maximum permissible errors on verificati011or on Inspectionshall be ± 7 ml for 1000 ml measures and ± 5 ml for 500 ml measure.

7. Marking Each measure shall have permanently and legibly engraved or etched its denomination in Jndo-Arabic numerals, the abbreviations 'ml' and 'Mil' being used to indicate millilitres. The manufacturer's name or trade mark shall be marked on the underside of the base of each measure.

Note: The abbreviation '11@1' may be indicated in (egionalscript.

500 ml

BEAKER MEASURES OF METRIC SERIES

362 'ffHE·.GAZETJ:E OF .JNDIA: EXTRAORDINARY '.GRADUATION,AND DIMENSIONS OF BEAKER MEASURES mination (J)ml ,at 'back lines at 200,600and 1000ml at each SO ml;

numbered at each 100 ml;

unnumbered back lines at 100,300 and ,Distance .between .highest · graduation marks (J)cm 9±0.S Height of lowest graduation mark above bottom of measuring surface (4)cm Diameter of top (*S)cm Min.

Diameter of base (*6)cm Overall height minimum thickness of the sheet for liquor measures shali be 1.2 mm.

5. Shapes and dimensions The shapes and nominal dimensions of hand operated liquor measures and automatic liquor measures shall be as given in Figure 17, 18 and 19 respectively.

6. Manufacture

(a) Liquor measures made of brass sheet shall be well tinned or silver-plated uniformly all over the Inside as well as the outside surface.

(b) Hand operated liquor measures shall be well formed, Measures of 60 ml and 30 ml capacity may be joined together with a common stem by brazing.

(c) The measures shall be free from any surface defects and indentations and shall be smoothly finished.

(d) Automatic liquor measures shall be capable of delivering 30 ml of liquor when tilted at an angle of 120 from the vertical.

(e) Hand operated liquor measures shall have a knurled edge.

7. Permissible error The maximum permissible errors shall be as given below:- * these are only recommendatory

8. Stamping The Legal Metrology Officer's seal shall be affixed after each verification just above the uppermost graduation marks.

PART III· UQUOR MEASURES 1, General This Part deals with the requirements for liquor measures of two types.

2. Types Liquor measures shall be of the following two types:-

(i) Hand operated, and

(ii) Automatic.

3. Denominations The denominations of the types of liquor measures shall be as given below:- Hand operated : 100 ml, 60 ml and 30 ml.

Automatic : 20 ml.

4. Material The body of the liquor measures shall be made from glass or brass sheet or. stainless steel sheet The Denomination 100 ml 60 ml 30 ml Permissible error ±3ml ±2ml ±lml M 30ml i i I i i I I l i

SHAPE AND NOMINAL DIMENSIONS OF COMBINED LIQUOR MEASURES

? 100ml i ! ?ml.

SHAPEANDNOMINALDIHENSIONS

OF COMBINED LIQUOR MEASURE

60 ml and 30 ml capacity l_1 fl

SHAPE AND NOMINAL DIMENSIONS

OF AUTOMATIC LIQUOR MEASURE

Metallic measures lm O.Sm

8. Markings

(a) Every liquor measure shall have the denomination and manufacturer's name or trade mark legibly and indeliblymarked on it.

(b) The denomination shall consist of international form ·of Indian numerals and the abbreviations 'ml' and 'film' to Indicate millilitres. The size of numerals shall be twice the size .of the letters indicating the manufacturer's name or trademark.

Note :The abbreviation 'fiR;ft' may be Indicated in the regional script.

9. Stamping Legal MetrologyOfficer's seal shall be affixed after every verification just below the indication of the denomination mark.

1. General This Part deals with the non-flexible type of length measures made or manufactured from metal or wood.

2. Denominations The denominations of the length measures shall be as follows :- Wooden measures 2m lm 0.5m

3. Material, shape, etc. of metallic measures

(a) Material-The measures shall be made from · mild steel, brass or stainless steel.

(b) Shape and dimensions-The shape and dimensions of the measures shall be as is shown in Figure 20.

(c) Graduationr-The graduation marks shall be made at every centimetre or at every centimetre for the first ten centimetres and thereafter at every five centimetres. The graduation marks at every ten centimetres shall be numbered. The marks at the centimetre divisions shall extend over half the breadth and thoseatflvecentimetre divisions over full breadth of the measures. A cross mark shall be provided at 25 cm in the case of 0.5 m measure and at 25, 50 and 75 cm In the case of 1 m measure (See Figure 20).

The graduations shall be only on one side of the measure.

(d) Permissible erro!'-The error on the length between any two consecutive five centimetre graduation marks shall not exceed± 0.25 mm and further the error from the beginning of the measure to any graduation mark shall not exceed 1.0 mm for 1 metre bar and 0.5 mm for half metre bars provided that the errors on the full length of the measures shall not exceed the following limits :

Denomination Verification Inspection Excess Defidency Excess Deficiency

(e) Provision for stampim- The measures shall be provided with a copper rivet near each end (see Figure 20) firmly fixed in a hole, countersunk on both sides, for the Legal Metrology Officer's stamp. An arrow head shall be marked at each end of the measure to providethe points for checking the length.

4. Material, shape, etc. of wooden measures

(a) Materials-The measure shall be made from well seasoned timber of any one of the following species :-

(a) Teak ( Tectona grandis Linn. lj

(b) Roseweed (Delbergia Latifolia Roxb) SECTIONAL ENLARGED VIEW OF RIVET ENLARGED VIEW OF REVERSE SiDE

(e) Bljasal (Pterocarpus marsupium Roxb)

(b) Shape and dimensionr The shape and dimensions of the measures shall be as shown in Figure 21 • • ir 2m I ' , ,, I I ,L I I t .•200an ?o .? .. I! 0 w ?· i.

r

WOODEN MEASURE

(c) Graduationr-Thegraduation marks shall be made at every centimetre for the first ten centimetres and thereafter at every five centimetres. The graduation marks at every ten centimetres shall be numbered. The marks at the centimetre divisions shall extend over half the breadth and trose at the five centimetre division over the full breadth of the measures.

A cross mark shall be provided at e1ery 25 cm, excludingthe one metre and two metre graduations. (See Figure 21) Last and first marks shall coincide with the end faces.

The graduation shall be on one side of the measures only.

(d) Permissible error-The error on the length between any two consecutive five centimetre graduation marks shall not exceed ± 1 mm, and further the error from the beginning of the measures to any graduation marks shall not exceed 2 mm, for 2 metre bar, 1 mm for 1 metre bar and 0.5 mm for half metre bar provided that the errors on the full length of the measure shall not exceed the following limits :

Excess Deficiency Excess Deficiency

(e) Provision for stamping-Each measure shall be provided at each end with a metal tip not less than 1 cm in width, securely riveted with two rivets at each end, as shown in Figure 21 for receiving the LegalMetrologyOfficer's stamp. The width of the tips shall be included in the total length of the measure.

s. Manufacture and finish

(a) The measure shall be evenly finished and shall be reasonably straight.

(b) In the case of metallic measures, the graduation marks and the cross marks shall be legible and deep enough to ensure lndelibilityover a reasonably long period of use, but .not so deep as to make the measures liable to be easily bent. In the case of wooden. measures, the markings shall be finished neatly, sharply and legibly, in a colour contrasting with the wood finish.

They shall be visible from a distance and shall remain indelible over a reasonably long period of use.

6. Marking (a). The denomination shall be stamped on the ungraduated side of the measure at about one-third of the total length from the beginning of the measure and the manufacturer's name or trade mark at a similar distance from the end of the measure. In the case of wooden.measures, the markings shall be finished in the same manner as the graduations.

(b) In Indicatingthe denominations the numerals shall be preceded by the word '>im' and followed by metre. The size of numerals and letters, indicating denominations of the measures shall be twice the size of the letters indicating the manufacturer's name or trade mark.

(c) The end of the measure shall be marked on the graduated side with the International form of Indian numeral Indicating the denomination, preceded and followed by the letters 'm' and 'm'.

may be indicated In the regional script.

PARTY-FOLDING SCALES

1. General This Part deals with wooden folding scales.

2. Denominations The denominations of folding scales shall be 1 3, Materials

(a) The scales shall be made from strips or sheets of wood. They shall be reasonably uniform, In width and thickness throughout the entire length.

(b) The scales shall be made of any one of the followingspecies of timbers:-

(1) Boxwood (Buxus sempervtrens)

(iii) Parrotla (Parrotia jucquemontlana) (Rand/a dumetorom)

(v) Bamboo.

(vii Haldu (Adina cordifolla Hoock f.)

(vii) Kalam (Mltragyna pafVlfollakorth)

(viii) Kuthan (Hymenodlctyon excelsum wall) (Ix) Gamri ( Gmellna abrorea Linn)

(c) The timber shall be thoroughlyseasoned and radially sawn. The moisture content of the timber shall be between 8 and 12 per cent.

The timber shall be free from knots, cracks, sap wood, shakes and other visible defects such as decay, insect attack, etc. and shall be fairly straight-grained.

4. Manufacture

(a) General-The scales shall be reasonably straight and flat, the edges parallel to each other and the ends reasonably square.

(b) No point on any of the edges shall be more than 0.5 mm distant from the straight line connecting its extremities. No point on the surface of a scale shall be more than 0.5 mm distant from the plane of the surface.

(c) The scales shall consist of four pieces hinged together and it shall be an end measuring scale. (First and last graduation shall be the end face). The joints shall work smoothly without undue play and shall be sufficiently free from the folds to be opened and closed without strain. The brass caps shall be closely fitted and strongly secured to the blades. They shall be made flush with the sides of the scales.

(d) A protective layer of suitable lacquer or varnish or any other suitable material shall be provided.

s. Dimensions The principaldimensions of the scale blanks shall be as follows :- length of graduated Width max. Min. Thickness (nm}

6. Graduations

(a) Graduation marks shall be made at every millimetre with a longer line at every S mm and centimetre. The length of the graduation lines shall be as follows:-

(b) The lines shall be fine and clear, of uniform depth and thickness, and perpendicular to the edges. The thickness of lines shall be not more than 0.2 mm for stamped scales and 0.1 mm for engine divided scales. The lines shall be of sufficient depth to be legible and Indelible.

(c) The lines shall be fill? in black and natural background or with a suitable colour which shall contrast with thecolour of the base to.

ensure legibility.

(d) Every centimetre shall be numbered in international form of!ndian numerals. The height of the figures shall be between 2 .0

7. Permissible error The cumulative error for the entire graduated part shall nl exceed ± a.so mm. Further, over any 10 cm length scale, the error shall not exceed± 0.2 mm.

8. Marking

(a) The denomination shall be stamped on the ungraduated side of the measure at a distance about one-third of the total length from the beginning of the measure. The manufacturer's name or trade mark shall be indicated Indeliblyat the same distance from the other end of the measure. The markings shall be finished in the same manner as the graduations.

(b) In indicatingthe denominations the numerals shall be preceded by the word "ifm" and followed by 'metre'.

Note :The word "-iim" may be Indicated In the regional script.

9. Stamping The LegalMetrology Officer's seal shall be affixed either on the metal strip at the ends or the central ·hingeas may be convenient.

PART VI-FABRIC OR PLASTIC TAPE MEASURE

1. General

(a) This Part deals with fabric or plastic tape measures, which are used for measurements, where the use of rigid length measures Is not convenient or practicable.

(b) Tape measures of 0.5 m to 5 m, made of materials specified in clause 4(b), are intended to be used for measurements required In the tailoring trade, anatomical measurements or household measurements.

lllpe measures of 5 m and above made of materials specified in clause 4( c) are intended to be used for measurements of buildings, roads, timber and timber products and for other similar measurements but not for measurements of land, storage tanks, fermentation vats and other similar measurements.

2. Classes of accuracy Fabric or plastic tape measure shall be divided into three classes of accuracy, namely, aass I, Class II and Class III, in accordance with their accuracy.

3. Nominal lengths Fabrics or plastic tape measures shall be made 4 m, 5 m or multiples of 5 metres, provided that the maximum nominal length shall not exceed 100 metres.

Note :The nominal length of a fabric or plastic tape measure is the distance at the reference temperature of 20°C between the initial and term Ina I graduation lines, when the tape measure is stretched, in the wet or dry condition, and without friction on a horizontal plane surface, under an extension of 20 newtons. The length so measured shall be equal, within the limits of maximum permissible errors, to the nominal length of the tape measure.

4. Materlal

(a) The materials used shall be adequately strong, stable and resistant to atmospheric conditions under the normal conditions of use and shall comply with the following requirements :- (I) When ordinarilyused at temperatures between ± 8°C of the reference temperature, the variation in length of the tape measure shall not exceed the maximum permissible error.

(II) When used with a change of± 10 per cent in the tension, the variation In length of the tape measure shall not exceed the maximum permissible error.

(b) Tilpe measures of nominal length O.Sm to Sm:

(I) The tape measure may be made from a suitable fabric or plastic material.

(II) The fabric shall be coated with suitable paints, enamels or other suitable coating so as to give the tape measure a good finish. All coatings shall be non-cracking and water resistant.

(c) Tape measure of nominal length above Sm:

(i) If made from fabrics, the fabric may be reinforced length-wise with rust­ proof and rigid wires of metal or other equivalentmaterial.

j_ ·--

(ii) If-made-from ·plastic materials, the tape measure shall be reinforced length-wise .by rneans of rust-proof and rigidwires of metal or glass fiber.

(iii) If made from any other material, the tape measure shall satisfy the condltlonsspecified in clause 4(a).

5. Manufacture

(a) General.;

(i) Tape measures shall be well-made, robust and carefully finished.

(ii) 'The cross-section of the tape measures shall have such dimensions and shape that, under normal conditions of use it allows the tape measure to have the accuracy specified for its class.

(iii) Tape measures shall be so made that when they are stretched over a plane surface their edges are practically straight and parallel.

(iv) The rings, winding, devices or other devices shall be attached to the tape in such a manner that they do not cause any inaccuracy or permanent defonmatlon in the tape.

(b) Tape meesores of nominal length O.Sm to Sm:

(i) Tape measures of nominal length O.Sm to Sm shall have a width of not less than 5mm and not more than 25 .mm.

(ii) If not wound on a spool or In a case, both the ends of the tape measure shall be reinforced with plastic or metal strips, of the same width as the tape measure, over a length of not less than 10mm or more than 100mm.

(iii) If wound on a spool or In a case, the tape measure shall have a metal ring or other device securely attached to the outer end of the tape measure.

A device, retraction or winding of the tape shall be provided.

(c) lape measure of nominal length above Sm :

(i) The tape measures shall have a width of not less than 10 mm and a thickness between 0.3 and 0.6 mm.

(ii) A metal ring shall be securely attached to the outer end of each tape measure. The ring shall be securely fastened to the tape measure by a metal strip of the same width as the tape.

(iii) The outer end of the tape measure shall be reinforced over a length of not less than 100 mm by a strip of leather or other suitable material of the same width as the tape measure.

The strip shall pass round the inner end of the ring and under the metal strip .

Note :This strip, besides serving as a protective device shall also be utilised for affixing the stamp of verification.

(iv) The tape measure shall be rolled into a suitable container or wound on a windingdevice made of metal, plastic, leather or other suitable material.

6. Graduations

(a) General requirements :

(i) Graduation lines shall be clear, uniform, indelible and so made as to ensure easy and unambiguous reading.

(ii) The value of the graduations shall be of the form 1 X 10",2 X 10' OT 5 X 10", the exponent "n" being positive or negative whole number or zero. The value of the graduation, however,shall not exceed:

1 cm, on measures of nominal length less than or equal to 2m, 10 cm, on measures of nominal length 20 cm, on measures of nominal length 50 cm, on measures of nominal length equal to or more than 50 m.

(Ill) Graduation lines shall be reasonably straight, perpendicular to the axis of the tape measures and of uniform thickness throughout the length.

(Iv) Graduations lines shall be so made that they form a clear and distinct scale and their thickness does not cause any inaccuracy of reading.

(b) Tape measures of nominal length 0.5 m to Sm:

(i) The zero graduation line may be located at the outer end of the ring or other device or may commence on the tape itself at a length equal to or greater than 50 mm from the outer end of the ring or other device.

(ii) The tape measures may be graduated throughout at every millimetre or ). (iii) The graduation lines at every10 mm shall be marked in such a manner that there is. no confusion between the 10 mm lines and the millimetre or 5 mm lines.

(iv) The tape measures may be graduated on one side or both the sides. If the tape is graduated on one side, the manufacturer's name, trade mark, advertisement or other similar matter may be printed on the ungraduated side of the tape measure.

(c) Iepe measures of nominal length above Sm:

(i) The zero graduation line may be located at the outer end of the metal ring or on the tape itself, at a length equal to or greater than 100 mm from the outer end of the ring.

(ii) The tape measure may be graduated at e;ery millimetre, every 5 millimetre or every 10 millimetre.

(iii) The graduation lines at every 10 mm shall be marked in such a manner that there is no confusion between the 10 mm graduation lines and the millimetre or 5 mm graduation line.

(iv} The graduation lines at every 10 m shall have a length approximately half the width of the tape.

(v) Every graduation line at 50 mm shall have the same length as the graduation line at 10 mm but may have an arrow at Its end. This requirement shall not apply to tape measures graduated at every millimetre.

(vi) The zero grad·uatlon line, the graduation lines at every 100 millimetres and at every metre shall have a length equal to the width of the tape.

7. Numbering (a} General requirements :

(i) The numerals shall be indicated clearly, uniformly and indelibly and shall be easily and unambiguously legible.

(ii) The places, dimensions, shape, colour and contrast of the numerals shall be suitable for the scale and graduation lines to which they relate.

(Ill) The numerals shall be marked parallel to or perpendicular to the axis of the tape measure depending upon the intended manner of use of the measure.

(b) On tape measures of nominal length 0.5 m to Sm:

(I) Every graduation line at 10 mm shall be marked with the complete number of centimetre.

Explanation :The graduation number marked may be, for example 122 and not. 22 after completion of one metre.

(ii) The heightofthe numerals shall not exceed two-thirds the width of the tape measures.

(c) On tape measures of nominal length above 5m:

r: ,c (i) The graduation lines at every 100 mm and at every metre shall be numbered. The numerals shall have a height of not more than two-thirds of the width of the tape.

(II) the metre graduations shall be accompanied by the symbol 'rn' and, if required,' tll' Note: The abbreviation 'tll' may be indicated In the regionalscript.

(Ill) After the graduation line at one metre, every graduation line at 100 mm may be marked with an additional numeral indicating the completed number of metres. This numerals, if provided, may be located just above, below or in line with the numeral of the 100 mm graduation line. The height of the numeral may be approximately half the height of the numerals indicating 100 mm.

8. Maximum pennissible error (I) On verification, under the conditions specified in clause 2, the error on the length .L 370 ·,THEfGAZETTE:Of INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)] between.the axis of any twqgrai:luation:lines shall notexc-eed : ... · for oesst ;±:'(0:1-.+:0,ll) mm;

for Class III £(0;6 :+,OAL:),mm;' Where'.L•tsithe·lerigth ·between the two graduation lines .concerned, expressed in number. of metres.

(ii) The maximum iperrnisslbte error on tape measures on:lnspection shall be twice that specified .for werification, the methods of verification.remaining .unchanged.

(iii) Tape measure of .nominal length 0.5 m to 5 m shall·belongto accuracy aass II or Class m.

(iv) Tape .measures of nominal length above 5 m shall belong to accuracy Class I, Class II or Class HI.

9. Marldngs

(a) Tape measures of nominal length 0.5 m to Sm:

The tape measures and the case or container, if provided shall be marked at a suitable place with the following markings :

(i) nominal length in metres.

(ii) manufacturer's name or trade mark or both.

(iii} class of accuracy II or III In an oval.

(iV} an Indication of the location of zero on the scale.

(v) model approval number Issued by the Central Government ..

(b) Tape measure of nominal length above Sm:

· The tape measure and the case or container or other device, where provided shall be marked near the zero graduation line and on the container, case or other device with the following markings :-

(i) nominal length in metres.

(ii) manufacturer's name or trade mark or both.·

(iii) class of accuracy : I, II or III in an oval.

(iV) an indication of. the location of zero on the scale.» ·

(v) model approval number Issued by the Central Government.

(c) The inscription shall be clearly visible and legible.

(d) Advertising inscriptions, if made, shall be carried out of such a manner that they did not Intrude in any way with the use of the tape measure.

The stamp of verification shall be affixed on the metal, plastic, leather or other strip provided at the beqlnnlnqof the tape measure.

PART VII-5TEEL TAPE MEASURES

1. General This Part deals with steel tape measures which are used for measurements where the use of rigid length measures is not convenient or practicable

2. Classes of accuracy Steel tape measures shall be divided into three classes, namely, Class I, Class II and Class III, In accordance with their accuracy.

The tape measures shall be made in nominal multiples of 5 m, provided that the maximum nominal length not exceed 200m.

Note : The nominal length of a steel tape measure Is the distance at the reference temperature of± zooc, between the initial and terminal graduation lines, when the tape measure is stretched, without friction, on a horizontal plane surface, under a tension of 50 newtons. The length so measured shall be equal, within the limits of maximum permissible errors, to the nominal length of the tape measures.

4. Materials

(a) The materials used shall be adequately strong, stable and resistant to environmental influences under normal conditions of use and shall comply with the following requirements :

(I) when ordinarily used at temperatures between ± 10°C of the reference temperature, variation in length of the tape measure shall not exceed the maximum permissible error;

(Ii} when used with a change of± 10% in the tensions, the variation in length of the tape measure shall not exceed the maximum permissible error.

(b) The tape measure shall be made from steel or stainless steel.

5. Manufacture

(a) Tape measures shall be well made, robust and carefully finished. (See Figure 22 to 26).

(b) The cross section of the tape measures shall ['WTII ?3(i)J 371 have such dimensions and shape that, under normal conditions of use, it allows the tape measures to have the accuracy specified for its class.

Note : It ts recommended for guidance of manufacturer and users that tape measure may have a width of not less than 5 mm and a maximum thickness of 0.4 mm.

(c) The steel tape measure sha II be so made that when It Is stretched on a plane surface, the edges are practicallystraight and parallel.

(d) At the zero end, tape measures shall be provided, with a ring or other device for facilitating withdrawal. The ring or other device, when provided, shall be fastened to the tape measure by a metal strip of the same width as the tape.

(e) The tape measures shall be capable of being wound Into suitable container or other winding device of robust construction and made of metal, plastic, leather or other suitable material.

(f) The winding devices shall be so designed that they do not cause any Inaccuracy or permanent deformation in the tape.

(g) The edges of tape measures shall be slightly rounded.

(h) The tape measure shall be provided with rust proof coating and shall be free from burrs.

6. Graduations

(a) General requirements

(i) Graduation lines shall be clear, uniform, indelible and so made as to ensure easy and unambiguous reading.

(ii) The value of the graduations shall be of the form 1 x 10", 2 x 10" or 5 x 10" metre where the exponent 'n' being a positive or negative whole number or zero.

The value of the graduations, however, shall not exceed :

1 cm, on measures of nominal length less than or equal to 2 rn, 10 cm, on measures of nominal length 20cm, on measures of nominal length 50 cm, on measures of nominal length equal to or more than 50 m.

(iii) Graduation lines shall be reasonably straight, perpendicular to the axis of the tape measure, and of uniform thickness throughout their length.

(iv) Graduation lines shaD be so made that they form a clear and distinct scale and that their thickness does not cause any inaccuracy of reading.

(b) Tape measures above 5 m to 200 m shall be graduated only on one side. Tape measures of 0.5 m to 5 m may be graduated on both sides (Only metric scale).

(c) The graduated lines, numbers and other markings shall be either in relief, engraved, typographically printed or made in any other suitable manner.

(d) The zero of the scale may be located at the outer or inner edge of the ring or other device, or may also be located on the tape measure itself, ata length equal to or greater than:

(I) 50 mm from the outer end of the ring or other device, in the case of tape measures of nominal length 0.5 m to 5 m; and (II) 100 mm from the outer end of the ring or other device,- in the case of tape measures of nominal lengths aboves m.

'.' (e) Tape measure of denominationsO.Sm to Sm may be graduated throughout at every millimetre, every 5 millimetre or every 10 millimetre.

(i) The graduation lines at every 10mm shall be marked In such a manner that there is no confusion between the 100 mm graduation lines and the millimetre or 5 mm graduation lines.

(II} In the case of tape measures graduated at every 5 mm or 10 mm, not less than the first 100 mm shall be subdivided into millimetre.

(f) In the case of tape measures of nominal length above 5 m, every graduation line at 50 mm shall have the same length as the graduation line at 10 mm but may have an arrow at its end. This requirement shall not apply to tape measures graduated at every millimetre.

(g) The thickness of the graduation lines shall not exceed the following limits :

0.4 mm in the case of Class I and Class II tape measures, and 0.5 mm In the case of Class III tape measures.

(h) In the case of tape measures of nominal length 0.5 m to· 5 m, the graduation lines 372 lTHE•_GAZEITE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)]

END OF MEASURE

MEASURE WITH ZERO AWAY FROM RING

EXAMPLES OF GRADUATIOIII LINES AND NUMERING

FIGURE. 24

1x1d' 1 .....__.__.1__,_I I .

sx10" , 1, 1, 1j,, 1,,, 1, 1, 1, 1,I ..

IU.USTRATION OF A MEASURE COMMENCING WITH ZERO

------- ---L . ;, u u ? 0" ••.. 'r : : I"') 0 10 14m 374 THE GAZETTE OF !NDIA:EXTRAORDINARY [PARrll-SEC. 3(i)] may have a length between one-fourth and full width of the tape, depending upon convenience. In the case of tape measures of nominal length above 5 m, the length of the graduation lines may 'be as follows :- {i) for millimetre graduation lines, about one-third of the width of the tape;

(ii) for 5 millimetre graduation lines, .about half the width of the tape;

(iii) Jor :10 :millimetre graduation lines, ,about.two-thirds the width of the tape;

.and

(iv) ,for lOOmillimetre graduation lines and ,for metre graduation lines as well as ,for the zero graduation lines, equal :to the width of the tape.

7. Numbering

(a) General requirements :

(i) The numerals shall be Indicated clearly, uniformly and Indelibly and shall be easily and unambiguously legible.

(ii) Toe places, dimensions, shape, colour and contrast of the numerals shall be suitable for the scale and graduation lines to which they relate.

(iii) The numerals shall be marked parallel to or perpendicular to the axis of the tape measure depending upon the Intended manner of use of the measure.

(b) The following graduation lines shall be numbered:

10 mm, for tape measure of nominal length 0.5 to S m, 100 mm for tape measure of nominal length exceeding 5 m.

(c) The metre graduation lines shall be numbered and accompanied by the symbol 'm' and if required "ifi" Note : The abbreviation ">ii" may be indicated In the regional script.

(d) In the case of the tape measure of nominal length of 0.5 m to 5 m, the height of the numerals shall be such as would facilitate the reading of the measurement without ambiguity.

(e) In the case of tape measures of nominal length 5 m and above, after the graduation line at one metre, every graduation line at 100 mm may be marked with an additional numeral indicating the completed number of metres. This numeral, if provided, may be located just above or in line with the numeral of the 100 mm graduation line. The heightof this numeral may be approximately half the height of the numerals indicating 100mm.

(f) In the case of tape measures of nominal length 5 m and above the height of the numerals, except those given in sub-clause

(e) of clause 7 may be:

(i) about 1/3 of the width of the tape, for 10 mm graduation lines,

(ii) about 1/2 of the width of the tape, for 100 mm graduation lines, and (Iii} about 2/3 of the width of the tape, for metre graduation lines.

(g) If tapes of 0.5 m to 5 m are contained In special container may be marked with Its dimension, for example, SO mm, to facilitate measurement of internal dimensions.

8. Maximum permissible error

(a) On verification, under the conditions specified in clause 2, the error on the length between the axis of any two graduation lines shall not exceed :

for Class II± (0.3 + 0.2L) mm, and where Lis length between two graduation lines concerned, expressed in metres, rounded off to the next higher whole number of metres.

(b) The maximum permissible error on tape measures on inspection shall be twice that specified for verification, the method of verification remaining unchanged.

(c) Steel tape measures of nominal length 0.5 m to 5 m shall belong to accuracy Class I or Class II.

(d) Tope measures of nominal length above 5 m shall belong to accuracy Class I, Class II or Class III.

2. Definitions

(a) Surveying chain+An instrument for measuring the surface distance between two points.

(b) Length of chain-The distance between the outside edges of the handles when fully stretched.

(c) Tallies-Metallic tags or indicators of distinctive pattern fixed at (various points) of the chain, to facilitate quick reading of fractions of a chain.

3. Material The different components of the chains shall be made from the materials mentioned against each.

9. Markings

(a) The steel tape measures shall be marked at a suitable place near the end and on the container, where provided with the following markings:

(i) nominal length in metre,

(ii) an Indication of the location of the zero of the scale, ..

(iii) the manufacturer's name or trade - mark or both,

(iv) class of accuracy : I, II or III in an oval,

(v) model approval number issued by the Central Government.

(b) The inscriptions shall be clearly visible and legible. ·

(c) Advertising inscriptions, if made, shall be carried out in such a manner that they do not intrude in any way with the use of the tape measure.

10, Sealing The stamp of verification shall be affixed on the metal, plastic, leather or other strip provided at the beginning of the tape measure.

Components Handle Eye Bolt Collar Ring Link, Small Link, Large Link, Connecting Tally Indicating ring Material Brass castings Brass suitable for free cutting and high speed machine work Galvanised mild steel wire 4mm.

Brass sheet or galvanized sheet Brass wire

1. General This Part deals with link type surveying chains of 20 m and 30 m lengths for land measurement.

4. Constructional details

(a) The nomenclature of the different parts of the chain and their dimensions shall be as Indicated in Figure 27, 28 & 29.

(b) The tallies shall be fixed at every fifth metre

BRASS RING AT EVERY

METRE LENGTH

TALLIES 1-5 TO

2-0 MM THICK 20-METRE CHAIN 1,......-------------som ..,

IBRASS RING AT EVERY

METRE LENGTH

-TALLIES 1-5 TO 2·0 MM THICK ENGRAVE 30 m ON.SURFACES A AND B TO INDICATE THE'LENGTH OF·CHAIN A ?.OOm,a (OR I SWG)

RING

HANDLE

Engrave 20 m OR 30 m OM SURFACE

INDICATE THE LENGTH OF CHAIN

74+1rn.m NOMENCIJ\lURE AND DETAILS OF 5 m LENGTH ATlliE BEGINNING AND END OF SURVEYJNG CHAIN Decimetre Full width of the tape Metre Full width of the tape (cl The tape shall be so made that it is capable of being wound on a drum and held In a winding frame or case.

(d) The free end of the tape shall be fitted with the dip weight or arrangements provided for attaching the dip weight.

6. Dip weights (al Dip weights shall be of two types, light and heavy, and shall be of cylindrical torpedo shape. The dimensions for light and heavy dip weights shall be as shown in Figure 30.

(bl The light type may either be fixed permanently to the tape or attached separately to it by any suitable device.

(cl The heavy type shall be attached to the tape by a swivel hook (See Figure 31l.

2. Definitions A dip tape shall mean essentially a graduated steel tape in one continuous length used in conjunction with a dip weight.

3. Denominations The tape shall be of the denominations 5, 10, 15, 20, 25 and 50 metres.

4. Material

(a) Tape-The steel used shall have a minimum tensile strength of 1500 M Pa.

(bl Dip weights or dip bobs-The dip weights · shall be made of brass or other non-sparking or low sparking material, sufficiently hard to resist damage by contact with steel.

5. Dlptape (al The dip tape shall be of the following dimensions:

Thickness : Between 0.20 and 0.30 mm Length : One continuous piece of sufficient length for the purpose required. The tape shall be longer than the distance between the dip reference point and the bottom of the container.

(b) Graduations (ll The tape shall be marked legibly and indelibly on one side only with a line at every millimetre or five millimetres, centimetre, decimetre and metre. The height of marking lines shall be as follows:

along the chain. Small rings shall be fixed at every metre, except where tallies are attached. Thllles shall have distinctive shapes depending on their position in the chain as shown In Figure 27 and 28.

(c) Connecting links between two large links shall be oval In shape, the central one being a circular ring.

(d) To faciUtate holding the arrows (chain pains) in position with the handle of the chain, a groove shall be cut on the outside surface of the handle as shown in Figure 29. The radius of the groove shall correspond to the radius of the arrows.

(el The handle joint shall have flexibilityin order that It may be possible to swivel the handle round the eye bolt. A swivel may also be provided at the middle of the chain.

5. Permissible error

(a) When measured with a tension of 80 newtons every metre length shall be correct with an error not exceeding± 2 mm.

The overall length of the chains shall be correct within the following limits of error :

(b) The permissible errors shall be the same for verification and inspection.

Explanation : Nominal distance between the centres of the circular links containing the small rings or tallies shall define the distance.

6. Marking

(a) The tallies used for marking the distances in chain shall be marked with letters ',:ft' and

(b) The length of the chain, 20 m or 30 m, as the case may be, shall be indelibly marked over the handle (See Figure 29l,

(c) The chains shall be indeliblymarked, on the reverse side of the surface of the handle having the denominations with the manufacturer's name or trade mark.

Note : The abbreviation .it may be Indicated in the regional script.

7, Provision for stamping A metal label or disc shall be permanently attached to the handled at the beginning of each chain for the verification of stamp.

PARTIX-TAPESFORUSEINMEASUREMENTOF

1. General This Part covers the requirements of tape with the dip weight attached to it and to be used In gauging petroleum, petroleum products and other oils. · Unit of graduation Millimetre Five millimetres Centimetre Approximate height of graduaffon mm 378 ·rHE GAZETTE OF INDIA: EXTRAORDINARY [PARTIl--SEC. 3(i)] 7t05 DETAIi. Of HOLE 3S ,so ----•U---...i All dimensions in millimetres

UGHT AND HEAVY DIP WEIGHT

['<11'1II-? 3(i)] / I \ I I \ I I \ L--:--? I I I I I I I I I I I I I I I I I 1 I I I I I I I I

I I I

I I I

\ I I \ I I \ I I \ I I

SWIVEL HOOK ATTACHMENT

380 'THE GAZETTE OF INDIA: EXTRAORDINARY (PARTII-SEC. 3(i)] Light Heavy

(d) The dip weight shall'have the lengths of graduation and weights given below :

denominations shall be legibly marked. In addition, direction of winding shall also be leglbly marked on the case or reel. Suitable provisions shall be made for LegalMetrologyOfficer's stamps on the dip weight and the tape.

(c) Every dip weight and dip tape shall be suitably marked to identify them with each other, Note : The word 'tim' and abbreviation 'l!\' may be Indicated in the regional script.

SPECJflCATION FOR NON-AUTOMATIC WEIGHING

INSTRUMENTS

PART I

· 1. General definitions

(1) Weighing instrument Measuring instrument that serves to determine the mass of a body by using the action of gravity on this body.

The Instrument may also be used to determine other quantities, magnitudes, parameters or characteristics related to mass.

Accordingto its method of operation, a weighing instrument Is classified as an automatic or non­ automatic Instrument.

(2) Non-automatic weighing instrument Instrument that requires the intervention of an operator du?ing the weighing process, for example to deposit on or remove from the receptor, the load to be measured and also to obtain the result.

The Instrument permits direct observation of the weighing results, either displayed or printed; both possibilities are covered by the word "indication".

Note : Terms such as "Indicate", "indicating component" and their derivatives do not include printing, A non-automatic weighing instrument may be -graduated or non-graduated, Indicating.

Note : In this specification, a non-automatic weighing Instrument is called an "instrument".

(i) Graduated instrument Instrument allowing the direct reading of the complete or partial weighing result.

Instrument in which the position of ±0.4 mm ±0,6 mm ± 1.0 mm ± 1.0 mm for the first five metres plus 0.5 mm for each addl- tlonal five metres or part thereof subject toa maximum error of 2.0mm.

Not more (I) One metre mark

(ii) Two metre mark

(iii) Five metre mark beyond the first five metres

(b) Between any two adjoining decimetre and metre lines

(c) From zero to the points specified below:

Length of graduations 150,mm 150 mm from bottom weight 700 + 50 g 1500 + 50 g

(e) The dlp weight shall .be graduated in a manner similar to .the tape.

(f) The graduations on the dip weight shall begln:from.its,bottomand shall be carried over.lnsuch a manner that when the dip weight Is attached to the tape the graduations are continuous from the weightto the tape.

7. Permissible error The error in the length of the tape supported on horizontal surface with a tension of 50 newtons shall not exceed the followinglimits :

(a) Between any two Not more adjoining mm and cm than ± 0.2 mm lines

8. Marking

(a) Every centimetre, decimetre and metre shall be marked with International form of Indian numerals.

The decimetre and metre numerals shall be In bold type. The metre divisions shall, in addition, bear the designation •'tjj' or 'rn' or both. The end of the tape measure shall be marked with word '"ITll:' or 'metre' or both.

(b) On the ungraduated side and on the case of each tape and also on the dip weight, the name or trade-mark of the manufacturer and the equilibrium rs obtained without the intervention of an operator.

(iii) Semi-self Indicating instrument Instrument with a self-indication weighing range, In which the operator Intervenes to alter the lfmits of this range.

Instrument equipped with electronic devices.

(v) Instrument with price scales Instrument that indicates the price to pay by means of price charts or scales related to a range of unit prices.

(vi) Price computing instrument Instrument that calculates the price to pay on the basis of the indicated mass and the unit price.

Price computing instrument that prints the weight value, unit price and price to pay for pre-packages.

(viii) Self-service Instrument Instrument that is intended to be operated by the customer.

(3) Indication provided by an instrument

(i) Printing indication Indication, signals and symbols that are subject to requirements of this specification

(ii) Indication, signals and symbols that are not primary indications.

2. Construction of an Instrument In .thls specification the term "device" Is used for any means by which a specific function is performed, irrespective of the physical realization, e.g. by a mechanism or a key initiating an operation;

the device may be a small part or a major portion of an instrument:

{1) Main device

(i) Load receptor or pan Part of the Instrument intended to receive the load.

(ii) Load transmitting device Part of the Instrument for transmitting the force produced by the load acting on the load receptor, to the load-measuring device.

(iii) Load-measuring device Part of the Instrument for measuring the mass of the load bymeans of an equilibrium device for balancing the force coming from the load transmitting device, and an Indicating or printingdevice.

Part of an instrument which performs a specific function, can be examined separately and Is subject to specified partial error limits.

(3) Electronic parts

(i) Electronicdevice A device employingelectronic subassembly and performing a specific function. An electronic device Is usually manufactured as a separate unltand can be independently tested.

Note : An electronic device, as defined above, may be a complete instrument (e.g.

Instrument for direct sales to the public) or parts of an Instrument (e.g. printer, Indicator).

A part of an electronic device, employing electronic components and having a recognizable function of its own. (e.g.

AID converter, display matrix).

(Ill) Electronlccomponent The smallest physical entity that uses electron or hole conduction in semi· conductors, gases or In a vacuum.

(4) indication device (of a weighing instrument) Part of the load measuring device on which the direct reading of the result is obtained.

(i) Indicating component Component indicating the equilibrium and/ or the result on an instrument with one position of equilibrium it indicate only the equilibrium (so-called zero).

On an instrument with several positions of equilibrium it indicates both the equilibrium and the result. On an electronic instrument, this is the display.

(11)Scafe mark A line or other mark on an indicating component corresponding to a specified value of mass.

(Ill) Scale base An Imaginary line though the centres of all the shortest scale marks.

-------c========-=:J_:..::·===--==========?-

(5) Auxiliary indicatingdevices

(i) Device for Interpolationof reading(Vernier) Device connected.to the:indicating element and sub-dividing the scale of an instrument, without special adjustment.

(ii) Complementary indicating device Adjustable device by means of which it is possible re estimate, .in units of mass, the value corresponding to the distance between a scale mark and the Indicating component,

(iii) Indla,tfng device with a differentiated scale. division Digital .Indicatingdevice of which the last figure after the decimal sign Is clearly differentiated from other figures.

(6) Extended indicating device A device temporarily changing the actual scale interval (d) to a value less than the verification scale interval (e) following a manual command.

(7) Supplementary devices

(i) Levelling device Device for setting an instrument to its reference position.

(ii) Zero setting device Device for setting the indication to zero when there Is no load on the load receptor.

(a) Non automatic zero setting device Device for setting the Indication to zero by an operator.

(b) Semi automatic zero setting device Device for setting the Indication to zero automatically following a manual control.

(c) Automatic zero-setting device Device for setting the Indication to zero automatically without the intervention of an operator.

(d) Initial zero-setting device Device for setting the Indication to zero automatically at the time the lnstrumenfis switched on and before it is ready for use.

(iii) Zero tracking device Device for maintaining the zero Indication within certain limits automatically.

Device for setting the indication to zero when a load is on the load receptor;

without altering the weighing range for net loads (additive tare device); or reducing the weighing range for net loads· (subtractive tare device).

It may function as:

a non-automatic devices {load balanced by an operator);

a semi-automatic device {load balanced automatically following a single manual command);

an automatic device {load balanced automatically without the intervention of an operator).

(a) Tare balancing device: Tare device without indication of the tare value when the instrument is loaded.

{b) Tare weighing device: Tare device that stores the tare value and Is capable of indicating or printing it whether or not the instrument Is loaded.

(v) Preset tare device Device for subtracting a preset tare value from a gross or net weight value and Indicating the result of the calculation.

The weighing range for net loads is reduced accordingly, Device for immobilizing all or part of the mechanism of an instrument.

(vii) Auxiliary verification device Device permitting separate verification of one or more main devices of an Instrument.

(viii) Selection device for load receptors and load measuring devices Devices for attaching one or more load receptors to one or more load measuring devices, whatever intermediate load transmitting device are used.

(Ix) Indication stabilizing device Device for maintaining a stable indication under given conditions.

3. Metrologica/ characteristics of an instrument

(1) Weighing capacity (Max) (I) Maximum weighing capacity, not taking Into account the additive tare capacity.

Value of the load below which the weighing results may be subject to an excessive relative error.

(iii) Self-indication eapacity Weighing capacity within which equilibrium is obtained without the intervention of an operator.

(iv) Weighingrange Range between the minimum and maximum capacities.

(v) Extension lnteival of self-lndieatlon Value by which it is possible to extend the range of self-Indication within the weighing range.

T = · Maximum capacity of the additive tare device or the subtractive tare device.

(vii) Maximum safe load (Lim) Maximum static load that can be carried by the Instrument without permanently altering Its metrological qualities.

(2) Scale divisions

(i) Scale spacing (Instrument with analogue indication) Distance between any two consecutive scale marks, measured along the scale base.

Value expressed in units of mass of,­ the difference between the values corresponding to two consecutive scale marks, for analogue indication, or the difference between two consecutive indicated values, for digital Indication.

(iii) Verification scale interval (e) Value expressed in units of mass, used for the classlflcations and verification of an instrument.

(iv) Scale inteival of numbering Value of the difference between two consecutive numbered scale marks.

(v) Number of verification scale intervals (single lnteival instrument) Quotient of the maximum capacity and the verification scale interval:

Instrument having one weighing range which is divided Into partial weighing ranges each with different scale intervals, with the weighing range determined automatically according to the load applied, both on Increasing and decreasing loads.

(vii) Multiple range Instrument Instrument having two or more weighing ranges with different maximum capacities and different scale intervals for the same load receptor, each range extending from zero to its maximum capacity.

4. Metro/09/cal properties of an instrument

(1) Discrimination Ability of an instrument to react to small variation of load.

The discrimination threshold, for a given load, is the value of the smallest additional load that, when gently deposited on or removed from the load receptor causes a perceptible change In the indication.

(2) Repeatability Abilityof an instrument to provide results that agree one with the other when the same load is deposited several times and In a practically identr ;al way on the load receptor under reasonably constant test conditions.

(J) Durability Ability of an instrument to maintain Its performance characteristics over a period of use.

(4) Warm-up time The time between the moment power Is applied to an instrument and the moment at which the instrument is capable of complying with requirements. '

5. Indications and errors

(1) Methods of tndtcstion (/) Balancing by weights:

Value of metrological controlled weights that balance the load (taking into account the reduction ratio of the load).

Indication enabling the evaluation of the equilibrium position to a fraction of the scale interval.

384 ,TFIB."GAZE'fTE ·OF INDIA: EXTRAORDINARY · [PARTII-SEC. 3(i)]

(iii) Digital Indication :

Indication ·Jn .. which· the scale marks are composed of a sequence of aligned figures thatxdo, notpermit interpolation to fractions of the scale interval.

(2) Weighingresults Note: The followingdefinitions·apply,only when the Indication has-been.zero 'before the loadnes been.applied ·to:the .lnstrument.

Indlcation,oflthe weight ·of a load on an instr.ument, ·with .no .tare or preset tare Indication of the weight of a load on an instrument after operation of a tare devfce.

The weight value of a load, determined by a tare weighing device.

{J) Other weight values

(i) Preset tare value {PT) :

Numerical value, representing a weight that is Introduced into the Instrument.

"Introduced" includes such as keying in, recalling from a data storage, or Inserting via an interface.

(ii) calculated net value:

Value of the difference between a gross or net weight value and a preset tare value.

(iii) calculated total weight value :

Calculated sum of more than one weight value and/or calculated net value.

(i) Reading by simple juxtaposition Reading of the weighing result by simple juxtaposition of consecutive figures giving the weighing result, without the need of calculation.

{ii) Overall Inaccuracy of reading The overall Inaccuracy of reading of an instrument with analogindication Is equal to the standard deviation of the same Indication, the reading of which is carried out under normal conditions of use by several observers.

It Is customary to make at least ten readings of the results.

(ill} Rounding error of digital indication Difference between the indication and the result the instrument would give with analog indication.

(Iv) Minimum reading distance The shortest distance that an observer Is able to freely approach the indicting device to take a reading under normal conditions of use.

This approach is considered to be free for the observer if there is a clear space of at least0.8 min front of the indicting device.

{See figure 32 A) The Minimum read· ing distance is S;

However, if S < 0.8 Indicating device m. the minimum reading distance is L.

Platform

FIGURE- 32A

(5) Errors (See Figure 32 B for illustration of certain terms used) r- - -- - ----- - - - - I I I r-r - - - - - - - - - - - - - J c, <.f

I --

-- -- --- c, Mn, 2t L.

Illustration of certain terms used M = mass to be measured E = error of indication MPE1=maximum permissible error on verification MPEz=maxlmumpermissible error in servlce (inspection) C = characteristic under reference conditions C 1 = characteristic due to influence factor or disturbance Cz =characteristic after durability tests I, = intrinsic Situation 1 : Shows the error E1 of an instrument due to an influence factor or a disturbance, !1 is the intrinsic error. The fault due to the influence factor or disturbance applied equals Situation 2: Shows the error E2 of an instru­ ment after the durability test. 12is the Initial Intrinsic error. The durability error equals E2 minus 12.

(I) Error (of Indication) The indication of an instrument minus the (conventional) true value of the mass.

The error of an instrument under reference conditions.

(iii) Initial intrinsic error The intrinsic error of an instrument as determined prior to the performance arid span stability tests.

Mn, Maximum difference, positive or negative, allowed by regulation between the Indication of an Instrument and the corresponding true value, as determined by reference standard masses, with the Instrument beingat zero at no-load, in the reference position.

(v) Fault The difference between the error or Indication and the Intrinsic error of an Instrument.

Note: Principally, a fault Is the result of an undesired change of data contained in or flowing through an electronic instrument.

A fault greater than e.

Note: For a rnulti-intervel instrument, the value of e is that appropriate to the partial weighing range.

The following are not considered to be significant faults, even when they exceed e:

• Faults arising from simultaneous and mutually independent causes in the Instrument.

• Faults implying the impossibility to perform any measurement.

• Faults being so serious that they are bound to be noticed. by alt those interested in the result of measurement.

386 ,THE GAZETTE OF. INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)] variations in the indication which cannot be ··Interpreted, .

memorized or transmitted as a measuring·result.

(vii) Durab17/tyerror The difference between:.the intrinsic error over a:pertod of use and the·initial intrinsic error of..an Instrument.

wear and tear ondue•to,driftand.aging of electronic parts. The concept '.Of •significant·durability error applies only to electronlc,parts.

Note 2: For a multHnterval instrument, the value of e is that appropdiateto.the partial weighing range.

The followingare not consideredto be significant durability error, .even when they exceed e:

Errors ocour:dng.after a perlod of Instrument use that are clearly the result of a failure of a device/ component, or ,d a disturbance and for which the indication :

o cannot be Interpreted, memorized, or transmitted as a measurement result/or o implies the impossibility to perform any measurement, or o is so obviously wrong that It Is bound to be noticed by all those interested In the results of measurement.' The capacity of an instrument to maintain the difference between the Indication of weight at maximum capacity and the indication at zero over period of use within specified limits.

6. Influence and reference conditions

(1) Influence quantity A quantity that is not the subject of the measurement but which influences the values of the measure and or the Indication of the Instrument.

(i) Influence factor An Influence quantity having a value within the specified rated operating conditions of the Instrument.

(ii) Disturbance An influence quantity having a value within the limits specified in this specification but outside the specified rated operating conditions of the instrument.

(2} Rated operating conditions Conditions of use, giving the range of values of influence quantities for which the metrologlcal characteristics are intended to lie within the specified maximum permissible errors.

(3) Reference conditions A set of specifiedvalues of influence factors fixed to ensure valid inter-comparison of the results of measurements.

(4) Reference position Position of the instrument at which its operation is adjusted.

7. Performance test A test to verify whether the equipment under test (EUT) is capable of performing its intended functions.

PART II

NON-AllT'OMAllCWEIGHING INSTRUMENTS J. Scope.

This specification specifiesthe metrological and technical requirements for non-automatic weighing instruments and will not be applicable to the following non-graduated instruments :

(1) Beam scale

(2) Counter machine

(1) Units of measurement

(i) The units of mass to be used on an instrument shall be the kilogram (kg) the milligram (mg), .the gram (g) and tonne (t).

(ii) For special application e.g. trade with precious stones, the metric carat (1 carat = 0.2 g) may be used as unit of measurement. A symbol for the carat shall be\\c".

The requirements apply to all instruments irrespective of their principles of measurement.

Instruments are dassified according ta:

o the verification scale interval, e the number of verification scale intervals.

The maximum permissible errors are in the order of magnitude of the verification scale interval.

A minimum capacity (Min) is specified to indicate that the Instrument should not be used for measuring loads below that limit.

(2) Verification scale Interval

(i) Verification scale interval shall be in the form k being a positive or negative whole number or equal to zero.

(ii) The verification scale interval for different types of Instruments shall be as given in Table 16.

3. Metro/oglca/ requirements {I} Principles of classification

(i) Accuracy classes The accuracy classes for instrument and their symbols shall be as given in Table 15.

(3) Classlfic8tlon of instruments (I) Toe verification scale interval, number of verification scale Intervals and the minimum capacity, in relation to the accuracy class of an instrument, shall be as given in Table e=d Verification scale interval Type of instrument Graduated, without device Graduated, with auxlllary Indicating device e is chosen by the requirement in sub­ paragraph (3) and clause (iii}of sub-paragraph (5) of this paragraph.

Non-graduated e is chosen by the manufacturer according to sub-paragraph

(3) of this paragraph.

n I m Special accuracy Highaccuracy Medium accuracy Ordinary accuracy Accuracy class Verification scale lntervale Number.of verification scale intervals Minimum rapacity may have weighing ranges in classes I and II or in classes II and III. The instrument as a whole shall then comply with the more severe requirements of sub-paragraph (9) o( this paragraph applicable to either of the two classes.

(4) Additional requirements for a multi-interval instrument (I) Partial weighing range Each partial range (index i = 1, 2 ... ) shall be defined by:

-Its verification scale intervals ei, e,+i > e1 Its maximum capacity Maxi Its minimum capacity Mini=Max(i-1)(for I = 1 the minimum capacity is Mini = Min) minimum Sgse 500 Note : For values of 'e' less than 1 mg In respect of class I accuracy instruments, e shall be taken to be equal to 1 mg for the purpose of verification/Inspection.

See for exception In clause (v) of sub-paragraph

(5) of this paragraph.

(ii) On multiple range instruments, If the verification scale intervals are e1, ez .... er­ < e,, Min, n and Max shall be indexed accordingly.

( iii) On multiple range instruments each range shall be treated as an instrument with one range.

(iv) For special application that are clearly marked on the instrument, an Instrument maximum 20 e SOe 20e 20 e 10e

388. THE GAZETTE OF INDIA:EXTRAORD!NARY [PARTCT-SEC. 3(i)] last differentiated figure : 5 e = 0.1 g last differentiated figure : 8 e = 0.1 g

(i) Example of a complementary indicating (II) examples of indicatingdevices each with a differentiated scale division (**) for an instrument of class I with d< 0.1 mg, n may be less than 50000.

(I) Values of maximum permissible errors on The maximum permissible errors allowed for increasing or decreasing loads shall be as given Table 26.

(v) Minimum number of verification scale Intervals Figure 32-C Example of a auxiliaryindicating device (Iv)Minimum capacity The minimum capacity of the instrument Is determined in conformity with the requirements in Table 17.

(6) Maximum permissible errors The numberotventlcatlonscale intervals n for each partial range is equal to n1 = Maxifei and minishall comply with:therequirements given In Table 40 according to the accuracy class of the Instrument.

(iii) Maximum capacity ofpartial weighing ranges With ·.the exception of the last partial weighlngr.mge, the.requirements In Table · 18 shallbe complied with, according to the accuracy.class of the instrument.

Gass

(iv) Instrument with a tare device Requirements concerning the ranges of a multi­ interval instrument apply to the net load, for every possible value of the tare.

(5) Auxiliaryindicating devices Only Instruments of classes I and II may be fitted with an auxiliaryindicatingdevice, which shall be,- -a device with a rider, or -a device for Interpolation of reading, or -a complementary indicatingdevice (*) or -an Indicatingdevice with a differentiated scale division (**).

These devices shall be permitted only to the right of the decimal sign.

(ii) A multi-interval instrument shall not be fitted with an auxiliary indicating device.

(iii) VerifiCatlon scale interval The verification scale interval e shall be determined by the expression d « e « 10d*** such that e k being a positive or negative whole number, or zero. This condition shall not apply to an instrument of class I with d < 1 mg. In that case e shall uniformly be 1 mg.

***The value of e, calculated followingthis rule, are, for example, Maximum permissible errors on veriRcatlon/ re-verification For loads m expressed In verification scale intervals e 50000< m 5 200000 5000 5 m 5 20 000 200000 < m 20000 <m < 100000 ±0.5e ±le +!.Se Class I Class II Class Ill soo 5m5 2000 2000 < m < 10000 Class IV SO <m 5200 200 < m < 1000

(ii) Values of maximum permissible errors in inspection The maximum permissible errors during inspection shall be twice the maximum permissible errors allowed on verification.

(iii) Basic rules ccncerning the determination of errors

(a) Influence factors Errors shall be determined under normal test condition. When the effect of one factor Is being evaluated, all other factors are to be kept relatively constant, at a value close to normal.

(b) Maximum permissible errors for net values The maximum permissible errors apply to the net value of the load for every possible tare load, except preset tare values

(c) Tare weighing device The maximum permissible error for a tare weighing device Is the same, for any tare value as those of the Instrument, for the same value of load.

(7) Permissible difference between results Regardless of what variation of results is permitted, the error of any single weighing result shal I by itself not exceed the maximum permissible error for the given load.

(i) Repeatability The difference between the maximum and minimum results of several weighings of the same load shall not be greater than the absolute value of the maximum permissible error for the given load.

The Indications for different positions of a load shall meet the maximum permissible errors, when the Instrument is tested according to sub-paragraphs (a) to (d) of this paragraph.

(a) Unless otherwise specified hereafter, a load corresponding to 1/3 of the sum of the maximum capacity and the corresponding maximum additive tare effect shall be applied.

(b) On an instrument with a load receptor having n points of support, with n>4, the fraction 1/(n-1) of the sum of the maximum capacity and the maximum additive tare effect shall be applied to each point of support.

(c) On an instrument with a load receptor subject to minimal off-centre loading (e.g. tank, hopper) a test load correspondingto one-tenth of the sum of the maximum capacity and the maximum additive tare effect shall be applied to each point or support.

(d) On an instrument used for weighing rolling loads (e.g. vehicle scale, rail suspension instrument) a rollingtest load corresponding to the usual rolling load, the heaviest and the most concentrated one which may be weighted, but not exceeding 0.8 times the sum of the maximum capacity and the maximum additive tar effect, shall be applied at different points on the load receptor.

(Ill) Multiple indicating devices For a given load the difference between the Indications of multiple indicating · devices induding tare weighing device, shall be not greater than the absolute value of the maximum permissible error, but shall be zero between digital indicating or printing devices.

(Iv) Different positions of equ,1/brium The difference between two results obtained for the same load when the method of balancing the load is changed {Inthe case of an instrument fitted with a device for extending the self-indication capacity) in two consecutive tests, shall not exceed the absolute value of the maximum permissible error for the applied load.

(8) Discrimination (I) Non-self indicating instrument An extra load equivalent to the value of the maximum permissible error for the applied load when gently placed or withdrawn from the instrument at equilibrium shall produce movement as required under sub-paragraph (1) of paragraph 6.

(II) Self or semi-self indicating instrument

(a) Analogue indication An extra load equivalent to the 390 ''THE' GAZETTE ·.OF INDIA: EXTRAORDINARY [PARTIJ---SEC. 3(i)] maximum -permrsslbte -error for ·!IPPlledload when. placed,gently on or-withdrawn-from tthe ,Instrument at -equtllbrtum shall cause a .permanent.dlsplacement .of the not.less 'than ·0:7 times the extra load.

1An:addltlonal,load equal to 1.4 times .the actual, .scale interval, when (Qentfy,placed,on.or withdrawn from tthe 'instrument at equilibrium shall ,change the :initial indicatlon.

(9) Variation due to influence quantities and time An instrument shall comply, unless otherwise specified, with,,!ll.Jb-paragraphs (6), (7) and (8) of this paragraph under the conditions of (II)and (iii) of sub-paragraphr(9)-ofthls paragraph and additionally it shall comply with clauses (i) and (Iv) of sub­ paragraph {9) of this paragraph.

(i) lilting

(a) For Instrument of dass II, III or IV liable to be tilted, the influence of tilting shall be determined under the effect of a lengthwise or transverse tilting equal to 2/1000 or corresponding to the limiting value of tilting marked on, or Indicated by a level Indicator, whichever Is the greater tilt.

The absolute value of the difference between the indication of the Instrument in its reference position (not tilted) and the indication in the tilted position shall not exceed:

- at no load, two verification scale intervals, (the instrument having first been adjusted to zero at no load in Its reference position) except instruments of class II.

- at self indication capacity and at maximum capacity, the maximum permissible error (the Instrument having been adjusted to zero at no load both in the reference and in the tilted position).

An instrument sha II be fitted with a levelling device and a level Indicator fixed firmly on the instrument in a place clearly visible to the user, unless the Instrument is:

freely suspended, or installed in a fixed position, or complying with the requirements on tilting when tilted to 5% in any direction.

The limiting value of the level indicator shall be obvious, so that tilting is easily noticed.

Note : Limiting value of tilting : Displacement of 2 mm from a central position.

(b) On a class I instrument, the limiting value of tilting shall correspond to a tilt of no more than 2/1000 otherwise the Instrument shall meet the requirement for Instruments of class II.

(ii) Temperature

(a) Prescribed temperature limits If no particular working temperature Is stated in the descriptive markings of an Instrument, this instrument shall maintain Its metrological properties within the following temperature limits:

(b) Special temperature limits An instrument for which particular limits of working temperature are stated in the descriptive markings shall comply with the metrological requirements within those limits.

T?e limits may be chosen according to the application of the instrument.

The ranges within those limits shall be at least equal to:

5 °c for instruments of class (!) 15 °C for instruments of class (II) 30 °C for instruments of class (III) and (IV)

(c) Temperature effect on no-load indication The Indication at zero or near zero shall not vary by more than one verification scale interval for a difference in ambient temperature of 1°C for instruments of class (I) and 5°C for other classes.

For multi-interval instruments and for multiple range instruments this applies to the smallest verification scale interval of the instrument.

(Ill) Mains power supply An Instrument operated from a mains power supply shall comply with the metrologlcal requirements if the power supply varies:

in voltage from :-15% to+ 100/oof the value marked on the Instrument, in frequency: from-2% to+2% of the value marked on the instrument, if alternate current Is used.

(iv) Time under reasonably constant environmental conditions, an instrument of class I, II or III shall meet the following requirements.

(a) When any load Is kept on the instrument, the difference between the Indication obtained Immediately after placing a load and the indication observed during the following 30 minutes, shall not exceed o. 5 e. However, the difference between the Indication obtained at 15 minutes and after that at 30 minutes shall not exceed 0.2 e.

If these conditions are not met, the difference between the Indication obtained Immediately after placing a load on the Instrument and the indication observed during the followingfour hours shall not exceed the absolute value of the maximum permissible error at the load applied.

(b) The deviation on returning to zero as soon as the indication has stabilized, after the removal of any load which has remained on the instrument for one half hour, shall not exceed 0.5 e For a multi-interval instrument, the deviation shall not exceed 0.5 ei_.

On a multiple range Instrument, the deviation on returning to zero from Max 1 shall not exceed 0.5 e1.

Furthermore, after returning to zero from any load greater than Maxiand immediately after switching to the lowest weighing range, the indication near zero shall not vary by more than e1 during the following 5 minutes.

(c) The durability error due to wear and tear shall not be greater than the value of the maximum permissible error.

Adherence to this requirement is assumed if the instrument has passed the endurance test specified in paragraph 9, which shall be performed only for instrument with

(10) Pilttem evaluation tests Upon pattern evaluation, the tests given In paragraph 9 and Annexure A shall be performed, to verify adherence to the requirement in sub-paragraphs (6), (7), (8) and clauses (i) to (iv) of sub-paragraph

(9) of this paragraph, sub-paragraph (5) and (6) of paragraph 4, sub-paragraph (3) of paragraph 5 and sub-paragraph (1) of paragraph 6. The endurance test shall be performed after all other tests in paragraph 9 and Annexure A.

4. Technical requirements For ii se/F or semi· se/Flndfr:atfng tnstrumeots

(1) General requirements of construction (I) Suitability

(a) Suitability for application An instrument shall be designed to suit its intended purpose of use.

(b} Suitability for use An instrument shall be solidly and carefully constructed in order to ensure that it maintains Its metrological qualities during a period of use.

(c) Suitability for verification An instrument shall permit the tests set out in this specification to be performed.

In particular, load receptors shall be such that the standard masses can be deposited on them easily and In total safety. If weights cannot be placed, an additional support may be required.

It must be possible to identifydevices that have been subject to a separate type examination procedure (e.g.

load cells, printers).

(a) Fraudulent use An instrument -shall have no characteristics likely to facilitate its fraudulent use.

(b) Acctdental- breakdown .and mal­ adjustment An Instrument shall be so constructed that an accidental .breakdown or a mal-adjustmentof control elements likelyto disturb its correct functioning cannot take place without Its effect being evident.

(c) Controls controls .shall be .so designed that they cannot·normally come to rest in positions .other than those intended by ,design_, unless during the manoeuvre all Indication is made possible, :keys shall be marked unambiguously.

(d) Securing (Sealing) of components and pre-set controls An .Instrument shall have provisions as required by the director legal metrology, for securing components and preset controls to which access or adjustment likely to affect the metrologlcal characteristics of the Instrument, is possible.

On a class I instrument devices to adjust sensitivity may remain unsecured.

(e) Adjustment If an Instrument is fitted with an automatic or a semi-automatic span adjustment device, this device shall be incorporated inside the Instrument. External influence upon this device shall be practically impossible after sealing.

A gravity sensitive Instrument may be equipped with a device for compensating the effects of gravity variation. After securing, external influence on or access to this device shall be practically Impossible.

(2) Indketton of weighing results

(i) Quality of reading Reading of the results shall be rellable, easy and unambiguous under conditions of normal use:

the overall inaccuracy of reading of an analogue indicatingdevice shall not exceed 0.2e.

the figures forming the results shall be of a size, shape and clarity for reading to be easy.

l.,L.?-- · The scale, numbering and printing shall permit the figures which form the results to be read by simple juxtaposition:

Provided that this requirement shall not be applicable in the case of steel yard type weighing instruments.

(II) Form of the indication

(a) Weighing results shall contain the names or symbols of the units of mass in which they are expressed.

For any one indication of weight, only one unit of mass shall be used.

The scale interval shall be in the form the result is expressed, the index k being a positive or negative whole number or equal to zero.

All indicating, printing and tare weighing devices of an instrument shall, within any one weighing range, have the same scale Interval for any given load.

(b) A digital indication shall display at least one figure beginning at the extreme right.

Where the scale interval is changed automatically the decimal sign shall maintain its position in the display.

A decimal fraction shall be separated from its integer by a decimal sign (comma or dot), with the indication showing at least one figure to the left of the sign and all figures to the right.

Zero may be indicated by one zero to the extreme right, without a decimal sign.

The unit of mass shall be chosen so that weight values have not more than one non-significant zero to the right. For values with decimal sign, the non-significant zero is allowed only in the third position after the decimal sign.

(Iii) Limits of Indication There shall be no indication above Max +9 e

(iv) Approximate indication device The scale interval of an approximate indicatingdevice shall be greater than MaX/100 without being smaller than 20 e. This approximate device is considered as giving secondary Indications.

(v) Extending the range of self-indication on a semi-self-Indicating instrument The extension Interval of the range of self­ indication shall not be greater than the value of the self-indication capacity.

(a) The scale interval of extension of the range of the self-indication should be equal to the capacity of self, indication (comparator instruments are excluded from this provision).

(b) An extension device with accessible sliding poises is subject to the requirements of clause (ii) of sub­ paragraph (2) of paragraph 6.

(c) On an extension device with enclosed sliding poises or mass switching mechanisms each extension should involve an adequate change in the numbering.

It should be possible to seal the housing and the adjusting activities of the weights or masses.

I

(3) Analogue indicating device.

The followingrequirements apply in addition to those In clause (i) to (iv) of sub-paragraph (2) of this paragraph.

(I) Scalemarks : Length and width Scale shall be designed and numbered so that reading the weighing results is easy and unambiguous.

(a) Formsofscalemarks.

Scale marks shall consist of lines of equal thickness; this thickness should be constant and between 1/10 and 1/4 of the scale spacing, without being less than 0.2mm. The length of the shortest scale mark should be at least equal to the scale spacing.

(b) Arrangements of scale marks Scale marks should be arranged In accordance with one of the sketches in Figure 32-D (the line joining the end of the scale marks optional).

I I I

Figure 32 D-Examples of the application to rectilinear scales

(c) Numbering On one scale, the scale Interval of numbering should be:

--constant, 10k units (k being a positive or a negative whole number or equal to zero), -not greater than 25 times as the scale Interval of the instrument.

If the scale is projected on a screen, at least two numbered scale marks l(7 4 e, 6}!t - 9 9 should appear wholly in the projected zone.

The height of the number (real or apparent) expressed in millimetres should be not less than 3 times the minimum reading distance expressed in metre, without being This height should be proportional to the length of the scale mark to which it relates.

The width of a number, measured parallel to the base of the scale, -dj=·-??====== 394 . THE GAZETTE OF INDIA: EXTRAORDINARY [PARTII-SEC. 3(i)] should .be. less .than .the distance between two consecutive numbered scale marks.

The width of the polnter of the indicating components should be approximately equalto 'that of the scale marks and of the ·1engthsuch that the tip is etteast level with the shortest mark.

.The distancebetween the scale and the pointer should be at the most equal to the .scale spacing, without being greaterthan 2mm.

on an instrument of class{!) or (II);

1 mm for indicatinqdevlces:

0.25 mm for complementary Indicating devices;

on an instrument of class III and III!.

1.25 mm for dial indicating devices.

1. 75 rnm for optical projection Indicating devices.

(iii) Umitsofindication Stops shall be provided to limit the movement of the indicating component whilst allowing it to travel below zero and above the capacity of self-indication. This re-requirements does not apply to multi­ revolution dial instruments.

The stops limiting the movement of the indicatingcomponents should permit it to travel across zones of at least 4 scale spacings below zero and above the capacity of self-Indication (three zones are not provided with a scale on fan charts and on dials with a single revolution pointer they are called "blank zone").

(iv) Damping Dampingshould achieve a stable Indication within 5 simple half periods of oscillation.

Hydraulic damping elements sensitive to variations In temperature should be provided with an automotive regulating device or an easily accessible manual regulating device.

It should be Impossible for the fluid of hydraulic damping elements on portable instruments to spill when the instrument is inclined at 450,

(4) Dig/ta/indicating and printing devices The following requirements apply in addition to those in clauses (i) to (v) of sub-paragraph (2) of this paragraph.

(i) Change of indication After a change in load, the previous Indication shall not persist for longer than 1 second.

Equilibrium is deemed to be stable when,- ln case of printing and/or data storage, the requirement in clause (v) of sub­ paragraph {4) of this paragraph are met, In case of zero or tare operations clauses (Iv), (vi), (vii) of sub-paragraph (5) and

(viii) of sub-paragraph (6) of this paragraph, it is sufficiently close to the final equilibrium to allow a correct operation of the device within relevant accuracy requirements.

(Ill) Extended indicating device An extended indicating device shall not be used on an instrument with a differentiated scale division.

When an instrument is fitted with an · extended indicating device, displaying the Indication with a scale interval smaller than 'e' shall be possible only.

during pressing a key, or for a period not exceeding 5 seconds after a manual command.

In any case printing shall not be possible.

(Iv) Multiple use of indicating device Indications other than primary indication may be displayed in the same indicting device, provided that, - Quantities other than weight values are Identified by the appropriate unit of measurement, or symbol thereof, or a special sign.

Weight values that are not weighing results (sub-clause (I) through clause (Ill) of sub-paragraph (2) of paragraph 5 Part I ) shall be clearly identified, or they may be displayed only temporarily on manual command and shall not be printed.

No restrictions apply if the weighing mode Is made inoperative by a special command.

['WT 11-= 3(i)] 395 Printing shall be clear and permanent for the intended use, printed figures shall be at least 2 mm high.

If printing takes place, the name or the symbol of the unit of measurement shall be either to the right of the value. or above a column of values.

Printing shall be impossible when the equilibrium is not stable.

Stable equilibrium is considered to be achieved when over a period of 5 seconds following printout, no more than two adjacent values are indicated, one of which being the printed value.

(vi) Memory storage device The storage of primary indications for subsequent indication, date transfer, totalizing, etc, shall be impossible when the equilibrium is not stable. The criterion of stable equilibrium is the same as in clause (v) of sub-paragraph (4) of paragraph 4.

(5) Zero setting and zero-tracking devices An instrument may have one or more zero· setting devices and shall have not more than one zero-tracking device.

(i) Maximum effect The effect of any zero setting device shall not alter the maximum weighing capacity of the instrument.

The overall effect of zero setting and zero tracking device shall be not more than 4% and of the initial zero setting device not more than 20% of the maximum capacity.

(ii) Accuracy After zero setting, the effect of zero deviation on the result of the weighing shall be not more than 0.25 e; however, on an Instrument with auxiliary Indicating device this effect shall be not more than 0.5 d.

(iii) Multiple range instrument Zero setting In any weighing range shall be effective also in the greater weighing ranges If switching to a greater weighing range Is possible while the instrument is loaded.

(iv) Control of the zero setting device An instrument except an Instrument according to sub-paras (13) and (14) of this paragraph, whether or not equipped with an initial zero-setting device, may have a combined semi-automatic zero-setting device and a semi-automatic tare-balancing device operated by the same key.

If an instrument has a zero device and a tare-weighing device, the control of the.

zero-setting device shall be separated from that of the tare-weighing device.

A semi-automatic zero setting device shall function only; and when the instrument is In stable equilibrium, it cancels any previous tare operation.

(v) Zero indicating device on an instrument with digital indication An Instrument with digital indication shall have device that displays a special signal when the deviation from zero is not more than 0.25 e. This device may also work when zero is indicated after a tare operation.

This device is not mandatory on an Instrument that has an auxiliary indicating or a zero-tracking device provided that the rate of zero tracking is not less than 0.25

(vi) Automatic zero setting device An automatic zero-setting device shall operate only when,- the equilibrium is stable, and the indication has remained stable below zero at least 5 seconds.

(vii) Zero tracking device A zero tracking device shall operate only when.- the indication is at zero, or at a negative net value equivalent to gross zero, and the equilibrium is stable, and the corrections are not more than 0.5 d/ second.

When zero is indicated after a tare operation, the zero tracking device may operate within a range of 4% of max around the actual zero value.

(6) Tilre device (I) General requirements :

A tare device shall comply with the relevant provisions of sub-paragraph ( 1) through (4) of this paragraph.

The scale interval of a tare-weighing device shall be equal to the scale Interval of the instrument for any given load.

(iii) Accuracy:

A tare device shall permit setting the indication to zero with an accuracy better than:

± 0.25e for electronic instruments and any instrument with analogue indication.

± 0.25e for mechanical instruments with digital indication and instruments with auxiliary ,indication device.

± O.Se for mechanical instruments with digital indication and instruments with auxiliary indication device.

On a multi-interval instrument e shall be The tare device shall be such that It cannot be used at or below its zero effect or above its maximum indicated effect.

Operation of the tare device shall be visibly indicated on the instrument. In the case of instruments with digital indication this shall be done by marking the indicated net value with the sign "NET" or "Net" or "net".

Note: If an instrument is equipped with a device that allows the gross values to be displayed temporarily while a tare device is In operation, the "NET" symbol disappears while the gross value is displayed.

This is not required for an Instrument with a combined semiautomatic zero-setting device and a semi-automatic tare­ balancing device operated by the same key.

(vi) Subtractive tare device:

When the use of subtractive tare device does not allow the value of the residual weighing range to be known, a device shall prevent the use of the Instrument above its maximum capacity or Indicate that th Is capacity has been reached.

(vii) Multlple range instrument:

On a multiple range instrument the tare operation shall be effective also in the greater weighing ranges, if switching to a greater weighing range is possible while the Instrument is loaded.

(viii) Semi-automatic or automatic tare devices These devices shall operate only when the instrument is in stable equilibrium.

(ix) Combined zero setting and tare balandng device If the semi automatic zero setti? device and semi automatic tare balancing device are operated by the same key; sub clause (II) and (v) of sub-paragraph (5) of this paragraph and if appropriate sub-clause (vii} of sub-paragraph (5) of this paragraph apply at any road.

(x) Consecutive tare operations Repeat operation of a tare device is permitted.

If more than one tare device is operative at the same time, tare weight values shall be clearly designated when indicated or printed.

(xi) Printing of weighing results Gross weight values may be printed without any designation. For a designation by a symbol, only "G" Is permitted.

If only net weight values are printed without corresponding gross or tare values, they may be printed without any d?slgnation. A symbol for designation shall be "N". This applies also where semi­ automatic zero setting and semi­ automatic tare balancing are initiated by the same key.

Gross, net or tare values determined by a multiple range instrument or by a multi­ Interval instrument need not be marked by a special designation referring to the (partial) weighing range.

If net weight values are printed together with the corresponding gross and/or tare values, the net and tare values shall at least be identified by the corresponding symbof ''N" and ''T'? However, tt is permitted to replace the If net weight values and tare values .determined by different tare devices are printed separately, they shall be suitably Identified.

(7) Preset tare device Regardless of how a preset tare value is ,r,t,oduced into the device, its scale interval shall be equal or automatically rounded to the scale interval of the instrument. On a multiple range instrument, a preset tare value may only be transferred from one weighing range to another one with a larger verification scale interval but shall then be rounded to the latter. For a multiple Interval instrument, the maximum preset tare value shall not be greater than Maxi and the indicated or printed,calculated net value shall be rounded to the scale interval of the instrument for the same net weight value.

(ii) Modesofoperation A preset tare device may be operated together with one or more tare devices provided that:

clause (x) of sub-paragraph (6) of this paragraph Is complied, and a Preset tare operation cannot be modified or cancelled as long as any tare device operated after the preset tare operation is still in use.

preset tare devices may operate automatically only if the preset tare value is clearly identified with the load to be measured.

(iii) Indication of operation For the indicating device clause (v) of sub­ paragraph (6) of this paragraph applies.

It shall be possible to indicate the preset tare value at least temporarily.

Provisions of clause (xi) of sub-paragraph

(6) of paragraph 4 applies accordingly provided that if the calculated net value Is printed, at least the preset tare value Is printed as well, with the exception of an Instrument covered by sub-paragraphs (13), (14) or (16} of this paragraph.

Preset tare values are designated by the symbol "PT"; however, it is permitted to replace the symbol "PT" by complete words.

(8) Lockingpositions :i) Prevention of weighing outside the "weight" position If an instrument has one or more locking device, these devices shall only have two stable positions corresponding to "locked" and "weigh"; and weighing shall only be possible in the "weigh" position.

A "pre-weigh" position may exist on any instrument of class I or JI, except under sub-paragraphs (13), (15) or (16) of this paragraph.

(ii) Indication of position The "locked" and "weigh" positions shall be clearly shown.

(9) Auxiliary calibration devices (removable or fixed) (I) Devices with one or more platform The nominal value of the ratio between the weights to be placed on the platform to balance a certain load and this load shall not be less than 1/5000 (it shall be visibly Indicated just above the platform).

The value of the weights needed to balance a load equal to the verification scale interval shall be an integer multiple of O.lg The scale interval of the auxiliaryverification devices shall be equal to or smaller than 1/5 of the verification scale interval for which it is intended.

(1OJSelection of weighing 1anges on a weighing scale on a multiple range instrument The range which is actually in operation shall be clearly indicated.

(a) Manual selection of the weighing range is allowed -from a smaller to a greater weighing range at any load;

-from a greater to a smaller weighing range when there is no load on the load receptor and the indication is zero at a negative net value. The tare operation receptor shall be cancelled and the zero shall be set to± 0.25 e both automatically.

(11) Device for selection (or switching) between various load receptors-Load transmitting devices and various load measuring devices (1)Compensation of no load effect The selection device shall ensure compensation for the unequal no load effect 398 THE •GAZETTE OF INDIA: EXTRAORDINARY [PARTIl-SEC 3(i)] of the various 'loed receptors-lead

(ii) Zerosetting Zero setting ·of an instrument with any multiple ,combination of various load measuring devices and various load receptors ·shall be possible without any _ambiguity and in .accordance with the provisions Of sub-paragraph (5) of paragraph 4.

(iii) Impossfbllttyofweighing Weighing .shall not be possible while selectfon devices are being used.

(iv) Identification of the combination use Combination of load receptors and load measuring devices used shall be readily identifiable.

(12) "PlusH and "minus· comparative Instrument For the purpose of verification a "heavy" or "plus» and "light" or "minus" comparators Instrument is considered to be a semi-self indicating Instrument.

(i) Distinction between "pus" and "mtnus" zone On an analogue indicating device, the zones situated on either side of zero shall be distinguished by"+" and"·", On a digital indicating device, an inscription nearer the indicating device shall be given, (kg, t)

(ii) Form of scale Scale of a comparator instrument shall have at least one scale division dequal to e (d = e} on either side of zero. The corresponding value shall be shown at either end of the scale.

{13) Additlonaf requirement for an instrument for direct sales to the pubfJ:.

The following requirements apply to an Instrument of class II, III, or IV with a maximum capacity not more than 100 kg capacity designed for direct sa!e to the public.

(i) Primary Indication On an Instrument for direct sale to the public, the primary indications are the weighing results and the information about the correct zero position, tare, and pre-set tare operation.

(II) Zero setting device An Instrument for direct sale to the public