1、BSI Standards PublicationBS EN ISO 7500-1:2015Metallic materials Calibration and verification ofstatic uniaxial testing machinesPart 1: Tension/compression testingmachines Calibration and verification ofthe force-measuring systemBS EN ISO 7500-1:2015 BRITISH STANDARDNational forewordThis British Sta
2、ndard is the UK implementation of EN ISO 7500-1:2015.It supersedes BS EN ISO 7500-1:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/101/1, Uniaxial testing.A list of organizations represented on this committee can beobtained on request to its s
3、ecretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 82545 3ICS 77.040.10Compliance with a British Standard canno
4、t confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2016.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN ISO 7500-1 December 201
5、5 ICS 77.040.10 Supersedes EN ISO 7500-1:2004English Version Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system (ISO 7500-1:2015) Matriaux mtalliques - talon
6、nage et vrification des machines pour essais statiques uniaxiaux - Partie 1: Machines dessai de traction/compression - talonnage et vrification du systme de mesure de force (ISO 7500-1:2015) Metallische Werkstoffe - Kalibrierung und berprfung von statischen einachsigen Prfmaschinen - Teil 1: Zug- un
7、d Druckprfmaschinen - Kalibrierung und berprfung der Kraftmesseinrichtung (ISO 7500-1:2015) This European Standard was approved by CEN on 21 November 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the s
8、tatus of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French,
9、 German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cr
10、oatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
11、United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
12、 EN ISO 7500-1:2015 EBS EN ISO 7500-1:2015EN ISO 7500-1:2015 (E) 3 European foreword This document (EN ISO 7500-1:2015) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals“ in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemic
13、al analysis)” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016
14、. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 7500-1:2004. According to the CEN-CENELEC Internal R
15、egulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland
16、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7500-1:2015 has been approved by CEN as EN ISO 7500-1:2015 without any modification. BS EN
17、ISO 7500-1:2015ISO 7500-1:2015(E)Foreword iv1 Scope .12 Normative references 13 Terms and definitions .14 Symbols and their meanings 25 General inspection of the testing machine 36 Calibration of the force-measuring system of the testing machine . 36.1 General . 36.2 Determination of the resolution
18、46.2.1 Analogue scale . 46.2.2 Digital scale. 46.2.3 Variation of readings 46.2.4 Unit 56.3 Prior determination of the relative resolution of the force indicator 56.4 Calibration procedure . 56.4.1 Alignment of the force-proving instrument . 56.4.2 Temperature compensation . 56.4.3 Conditioning of t
19、he testing machine and force-proving instrument 56.4.4 Procedure . 56.4.5 Application of discrete forces . 66.4.6 Verification of accessories . 66.4.7 Verification of the effect of differences in piston positions . 76.4.8 Determination of relative reversibility error 76.5 Assessment of the force ind
20、icator 86.5.1 Relative indication error . 86.5.2 Relative repeatability error 96.5.3 Agreement between two force-proving instruments . 97 Class of testing machine range . 98 Verification report .108.1 General 108.2 General information 108.3 Results of verification 109 Intervals between verifications
21、 .11Annex A (normative) General inspection of the testing machine12Annex B (informative) Inspection of the loading platens of the compression testing machines .13Annex C (informative) Uncertainty of the calibration results of the force-measuring system .14Bibliography .18 ISO 2015 All rights reserve
22、d iiiContents PageBS EN ISO 7500-1:2015ISO 7500-1:2015(E)ForewordISO (the International Organization for Standardization) 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
23、. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Intern
24、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the diffe
25、rent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall
26、 not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is
27、information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) s
28、ee the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 1, Uniaxial testing.This fourth edition cancels and replaces the third edition (ISO 7500-1:2004) which has been technically revised.ISO 7
29、500 consists of the following parts, under the general title Metallic materials Calibration and verification of static uniaxial testing machines: Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system Part 2: Tension creep testing machines Verificatio
30、n of the applied forceiv ISO 2015 All rights reservedBS EN ISO 7500-1:2015INTERNATIONAL STANDARD ISO 7500-1:2015(E)Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring syst
31、em1 ScopeThis part of ISO 7500 specifies the calibration and verification of tension/compression testing machines.The verification consists of: a general inspection of the testing machine, including its accessories for the force application; a calibration of the force-measuring system of the testing
32、 machine; a confirmation that the performance properties of the testing machine achieve the limits given for a specified class.NOTE This part of ISO 7500 addresses the static calibration and verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed
33、or dynamic testing applications. Further information regarding dynamic effects is given in the Bibliography.CAUTION Some of the tests specified in this part of ISO 7500 involve the use of processes which could lead to a hazardous situation.2 Normative referencesThe following documents, in whole or i
34、n part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 376, Metallic materials Calibration of for
35、ce-proving instruments used for the verification of uniaxial testing machines3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1calibrationoperation that establishes the relationship between the force values (with associated uncertainties) indicate
36、d by the testing machine and those measured by one or more force-proving instruments3.2verificationconfirmation, based on analysis of measurements in accordance with this standard, that the performance properties of the testing machine achieve the limits given for a specified class ISO 2015 All righ
37、ts reserved 1BS EN ISO 7500-1:2015ISO 7500-1:2015(E)4 Symbols and their meaningsSymbols and their meanings are given in Table 1.Table 1 Symbols and their meaningsSymbol Unit Meaninga % Relative resolution of the force indicator of the testing machineaF% Relative resolution of the force indicator of
38、the testing machine at the applied forceaZ% Relative resolution of the force indicator of the testing machine at zero forceb % Relative repeatability error of the force-measuring system of the testing machinebal% Allowable value of b for a given classF N Relative error of the forcem kg Relative erro
39、r of the massg m/s2Relative error of the acceleration due to gravityE % Estimated mean relative errorE % Estimated mean relative reversibility errorf0% Relative zero error of the force-measuring system of the testing machineF N Reference force indicated by the force-proving instrument with increasin
40、g test forceF N Reference force indicated by the force-proving instrument with decreasing test forceFcN Reference force indicated by the force-proving instrument with increasing test force, for the complementary series of measurements for the smallest range usedFiN Force indicated by the force indic
41、ator of the testing machine to be verified, with increasing test forceFiN Force indicated by the force indicator of the testing machine to be verified, with decreasing test forceFFi,N Arithmetic mean of several measurements of Fiand F for the same discrete forceFicN Force reading on the force indica
42、tor of the testing machine to be verified, with increasing test force, for the complementary series of measurements for the smallest range usedFi0N Residual indication of the force indicator of the testing machine to be verified after removal of forceFNN Maximum value of the calibrated range of the
43、force indicator of the testing machineg m/s2Local acceleration due to gravityk Coverage factor used to calculate the expanded uncertainty from the combined uncertaintym kg Mass of dead weights used to generate a calibration forceq % Mean relative indication error of the force-measuring system of the
44、 testing machineqi% The ithmeasurement of the relative indication error of the force-measuring system of the testing machineqal% Allowable value of q for a given classqmax% The maximum value of q at each calibration pointqmin% The minimum value of q at each calibration pointqT1% Relative indication
45、error determined at a crossover point using force-proving instrument 12 ISO 2015 All rights reservedBS EN ISO 7500-1:2015ISO 7500-1:2015(E)Symbol Unit MeaningqT2% Relative indication error determined at a crossover point using force-proving instrument 2r N Resolution of the force indicator of the te
46、sting machineuc% Combined uncertaintyui% Uncertainty componenturep% Uncertainty component due to repeatabilityures% Uncertainty component due to resolutionustd% Uncertainty component due to the calibration standard usedU % Expanded uncertaintyU % Expanded reversibility uncertaintyUT1% Expanded uncer
47、tainty using force-proving instrument 1 at a crossover pointUT2% Expanded uncertainty using force-proving instrument 2 at a crossover pointv % Relative reversibility error of the force-measuring system of the testing machineairkg/m3Density of airmkg/m3Density of the dead weights5 General inspection
48、of the testing machineThe calibration of the testing machine shall only be carried out if the machine is in good working order. For this purpose, a general inspection of the machine shall be carried out before calibration of the force-measuring system of the machine (see Annex A).NOTE Good metrologi
49、cal practice requires a calibration run prior to any maintenance or adjustments to the testing machine to determine the “as found” condition of the machine.Information on the inspection of the loading platens is provided in Annex B. Uncertainty of the calibration results is discussed in Annex C.6 Calibration of the force-measuring system of the testing machine6.1 GeneralThis calibration shall be carried out for each of the force ranges used and with all force indicators in use. Any accessory devices (e.g. pointer, record
