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1、BRITISH STANDARD BS EN ISO 376:2002 Incorporating Corrigendum No. 1 Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machines The European Standard EN ISO 376:2002 has the status of a British Standard ICS 77.040.10 ? Licensed Copy: sheffieldun
2、 sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 376:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committe
3、e on 19 March 2002 BSI 16 October 2002 ISBN 0 580 39244 9 National foreword This British Standard is the official English language version of EN ISO 376:2002. It is identical with ISO 376:1999. It supersedes BS EN 10002-3:1995 which is withdrawn. The UK participation in its preparation was entrusted
4、 by Technical Committee ISE/NFE/4, Mechanical testing of metals, to Subcommittee ISE/NFE/4/1, Uniaxial testing of metals, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which i
5、mplement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online This publication
6、does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/Eu
7、ropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title pa
8、ge, the EN ISO foreword page, the ISO title page, page ii and iii, a blank page, pages 1 to 20, the Annex ZA page and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 14185 Corrigend
9、um No. 1 16 October 2002 Correction to the EN ISO foreword page and incorporating the Annex ZA page Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 376 January 2002 ICS 77.040.10Supers
10、edes EN 10002-3:1994 English version Metallic materials - Calibration of force-proving instruments used for the verification of uniaxial testing machines (ISO 376:1999) Matriaux mtalliques - Etalonnage des instruments de mesure de force utiliss pour la vrification des machines dessais uniaxiaux (ISO
11、 376:1999) This European Standard was approved by CEN on 26 December 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliog
12、raphical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a C
13、EN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, N
14、orway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwi
15、de for CEN national Members. Ref. No. EN ISO 376:2002 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CORRECTED 2002-10-02 Foreword The text of ISO 376:1999 has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals“
16、 of the International Organization for Standardization (ISO) and has been taken over as EN ISO 376:2002 by Technical Committee ECISS/TC 1 “Steel - Mechanical testing“, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by public
17、ation of an identical text or by endorsement, at the latest by July 2002, and conflicting national standards shall be withdrawn at the latest by July 2002. This document supersedes EN 10002-3:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followi
18、ng countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 37
19、6:1999 has been approved by CEN as EN ISO 376:2002 without any modifications. NOTE Normative references to International Standards are listed in Annex ZA (normative). EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI A Referenc
20、e number ISO 376:1999(E) INTERNATIONAL STANDARD ISO 376 Second edition 1999-08-15 Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machines Matriaux mtalliques talonnage des instruments de mesure de force utiliss pour la vrification des machin
21、es dessais uniaxiaux EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI 9991 r llAights reserved. Unelss otherwise speceifid, no paro tf htsi pubcilatoin amy be reproduced or utzilied ni any ofrm or by any msnae, lecetrinoc
22、.rehsilbup eht morf gnitirw ni noissimrep tuohtiw ,mliforcim dna gniypocotohp gnidulcni ,lacinahcem ro noitazidradnatS rof noitazinagrO lanoitanretnI 65 elatsop esaC 02 evneG 1121-HC dnalreztiwS tenretnIhc.osiosi dnalreztiwS ni detnirP ii ContentsPage 1 Scope1 2 Normative reference1 3 Principle1 4 C
23、haracteristics of force-proving instruments.2 5 Symbols, units and designations.3 6 Calibration of the force-proving instrument .3 7 Classification of the force-proving instrument.7 8 Use of calibrated force-proving instruments9 Annex A (informative) Example of dimensions of force transducers and co
24、rresponding loading fittings .10 Annex B (informative) Additional information17 Bibliography20 EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSIISO 376:1999 iii Foreword ISO (the International Organization for Standardizati
25、on) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be re
26、presented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards
27、are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting
28、 a vote. International Standard ISO 376 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 1, Uniaxial testing. This second edition cancels and replaces the first edition (ISO 376:1987) which has been technically revised. Annexes A and B of this Internation
29、al Standard are for information only. EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DRADNATS LANOITA
30、NRETNI OSI)E(9991:673 OSI 1 Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machines 1 Scope This International Standard covers the calibration of force-proving instruments used for the static verification of uniaxial testing machines (e.g. t
31、ension/compression testing machines) and describes a procedure for classifying these instruments. A force-proving instrument is defined as being the whole assembly from the force transducer through to and including the indicator. This International Standard generally applies to force-proving instrum
32、ents in which the force is determined by measuring the elastic deformation of a loaded member or a quantity which is proportional to it. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Stand
33、ard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated belo
34、w. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machi
35、nes Verification and calibration of the force-measuring system. 3 Principle Calibration consists of applying precisely-known forces to the loaded member and recording the data from the deflection measuring system, which is considered an integral part of the force-proving instrument. When an electric
36、al measurement is made, the indicator may be replaced by another indicator and the force-proving instrument need not be recalibrated provided the following conditions are fulfilled. a) The original and replacement indicators have calibration certificates traceable to national standards which give th
37、e results of calibration in terms of electrical base units (volt, ampere). The replacement indicator shall be calibrated over a range equal to or greater than the range for which it is used with the force-proving instrument and the resolution of the indicator shall be at least equal to the resolutio
38、n of the indicator when it is used with the force-proving instrument. b) The units and excitation source of the replacement indicator should be respectively of the same quantity (e.g. 5 V, 10 V) and type (e.g. AC or DC carrier frequency). c) The uncertainty of each indicator (both the original and t
39、he replacement indicators) shall not influence the uncertainty of the whole assembly of the force-proving instrument. It is recommended that the uncertainty of the replacement indicator should be no greater than 1/3 of the uncertainty of the entire system. EN ISO 376:2002 Licensed Copy: sheffieldun
40、sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI )E(9991:673 OSI OSI 2 4 Characteristics of force-proving instruments 4.1 Identification of the force-proving instrument All the elements of the force-proving instrument (including the cables for electrical connection) sh
41、all be individually and uniquely identified, e.g. by the name of the manufacturer, the model and the serial number. For the force transducer, the maximum working force shall be indicated. 4.2 Application of force The force transducer and its loading fittings shall be designed so as to ensure axial a
42、pplication of force, whether in tension or compression. Examples of loading fittings are given in annex A. 4.3 Measurement of deflection Measurement of the deflection of the loaded member of the force transducer may be carried out by mechanical, electrical, optical or other means with adequate accur
43、acy and stability. The type and the quality of the deflection measuring system determine whether the force-proving instrument is classified only for specific calibration forces or for interpolation (see clause 7). Generally, the use of force-proving instruments with dial gauges as a means of measuri
44、ng the deflection is limited to the forces for which the instruments have been calibrated. The dial gauge, if used over a long travel, may contain large localised periodic errors which produce an uncertainty too great to permit interpolation between calibration forces. The dial gauge may be used for
45、 interpolation if its periodic error has a negligible influence on the interpolation error of the force-proving instrument. EN ISO 376:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI)E(9991:673 OSI 3 5 Symbols, units and designation
46、s For the purpose of this International Standard, the symbols, units and designations given in Table 1 shall apply. Table 1 Symbols, units and designations SymbolUnitDesignation FNNMaximum capacity of the measuring range FfNMaximum capacity of the transducer ioReadinga on the indicator before applic
47、ation of force ifReadinga on the indicator after removal of force XDeflection with increasing test force XDeflection with decreasing test force XrAverage value of the deflections with rotation XwrAverage value of deflections without rotation XmaxMaximum deflection XminMinimum deflection XaComputed v
48、alue of deflection XNDeflection corresponding to the maximum capacity b%Relative reproducibility error with rotation b%Relative repeatability without rotation fo%Relative zero error fc%Relative interpolation error rResolution of the indicator v%Relative reversibility error of the force-proving instr
49、ument a Reading value corresponding to the deflection. 6 Calibration of the force-proving instrument 6.1 General Before undertaking the calibration of the force-proving instrument, ensure that this instrument is able to be calibrated. This can be done by means of preliminary tests such as those defined below and given as examples. 6.1.1 Overloading test This optional test is described in clause B.1. 6.1.2 Verification relating to application of forces E