1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Metallic materials Calibration and verification of static uniaxial testing machinesPart 1: Tension/compression testing machines Calibration and verification of the force-measuring system (ISO 7500-1:2018)BS EN ISO 7500-
2、1:2018National forewordThis British Standard is the UK implementation of EN ISO 7500-1:2018. It is identical to ISO 7500-1:2018. It supersedes BS EN ISO 7500-1:2015, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/101/1, Uniaxial testing.A list of
3、organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limite
4、d 2018ISBN 978 0 580 96330 8ICS 77.040.10Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text a
5、ffectedBRITISH STANDARDBS EN ISO 7500-1:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 75001March 2018ICS 77.040.10 Supersedes EN ISO 7500-1:2015EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCENCENELEC Management Centre: Avenue Marnix 17, B1
6、000 Brussels 2018 CEN Ref. No. EN 7500-1:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersMetallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and ve
7、rification of the force-measuring system (ISO 7500-1:2018)Matriaux mtalliques - talonnage 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 7500-1:2018)Metallische Werkstoffe -
8、Kalibrierung und berprfung von statischen einachsigen Prfmaschinen - Teil 1: Zug- und Druckprfmaschinen - Kalibrierung und berprfung der Kraftmesseinrichtung (ISO 7500-1:2018)This European Standard was approved by CEN on 8 March 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regu
9、lations which stipulate the conditions for giving this European Standard the status 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 memb
10、er.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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN
11、 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, P
12、ortugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 75001:2018 (E)European forewordThis document (EN ISO 7500-1:2018) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical C
13、ommittee ECISS/TC 101 “Test methods for steel (other than chemical 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 September 2018, and conflict
14、ing national standards shall be withdrawn at the latest by September 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN
15、ISO 7500-1:2015.According to the CEN-CENELEC Internal Regulations, 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 Macedo
16、nia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 7500-1:2018 has been approved
17、by CEN as EN ISO 7500-1:2018 without any modification.2BS EN ISO 7500-1:2018ISO 75001:2018Foreword iv1 Scope .12 Normative references 13 Terms and definitions .14 Symbols 25 General inspection of the testing machine 36 Calibration of the forcemeasuring system of the testing machine .36.1 General .36
18、.2 Determination of the resolution 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 compensa
19、tion .56.4.3 Conditioning of the testing machine and force-proving instrument 66.4.4 Procedure .66.4.5 Application of discrete forces .66.4.6 Verification of accessories .76.4.7 Verification of the effect of differences in piston positions .76.4.8 Determination of relative reversibility error 76.5 A
20、ssessment of the force indicator 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 information 108.2 Results of verification 109 Intervals between veri
21、fications .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 forcemeasuring system .14Bibliography .18 ISO 2018 All rights
22、 reserved iiiContents PageBS EN ISO 7500-1:2018ISO 75001:2018ForewordISO (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 commit
23、tees. 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 In
24、ternational 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 d
25、ifferent 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 s
26、hall 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
27、 is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organi
28、zation (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 1, Uniaxial testing.This fifth edition cancels and replaces the fourth edi
29、tion (ISO 7500-1:2015), of which it constitutes a minor revision. The changes compared to the previous edition are as follows: the definitions of F, m, g, E, E, U, and U in Table 1 have been editorially revised.A list of all parts in the ISO 7500 series can be found on the ISO website.iv ISO 2018 Al
30、l rights reservedBS EN ISO 7500-1:2018Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system (ISO 75001:2018)1 ScopeThis document specifies the calibration and verific
31、ation 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 machine; a confirmation that the performance properties of the test
32、ing machine achieve the limits given for a specified class.NOTE This document addresses the static calibration and verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed or dynamic testing applications. Further information regarding dynamic effec
33、ts is given in the Bibliography.CAUTION Some of the tests specified in this document involve the use of processes which can lead to a hazardous situation.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements
34、 of this document. 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 force-proving instruments used for the verification of uniaxial testing machine
35、s3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available
36、 at https:/www.iso.org/obp3.1calibrationoperation that establishes the relationship between the force values (with associated uncertainties) indicated by the testing machine and those measured by one or more force-proving instrumentsINTERNATIONAL STANDARD ISO 75001:2018 ISO 2018 All rights reserved
37、1BS EN ISO 7500-1:2018ISO 75001:20183.2verificationconfirmation, based on analysis of measurements in accordance with this document, that the performance properties of the testing machine achieve the limits given for a specified class4 SymbolsSymbols and their meanings are given in Table 1.Table 1 S
38、ymbols and their meaningsSymbol Unit Meaninga % relative resolution of the force indicator of the testing machineaF% relative resolution of the force indicator of the testing machine at the applied forceaz% relative resolution of the force indicator of the testing machine at zero forceb % relative r
39、epeatability error of the force-measuring system of the testing ma-chinebal% allowable value of b for a given classF N error of the forcem kg error of the massg m/s2error of the acceleration due to gravityE % estimated mean relative error of incremental forcesE % estimated mean relative error of dec
40、remental forcesf0% relative zero error of the force-measuring system of the testing machineF N reference force indicated by the force-proving instrument with increasing test forceF N reference force indicated by the force-proving instrument with decreasing test forceFcN reference force indicated by
41、the force-proving instrument with increasing test force, for the complementary series of measurements for the smallest range usedFiN force indicated by the force indicator of the testing machine to be verified, with increasing test forceFi N force indicated by the force indicator of the testing mach
42、ine 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 indicator of the testing machine to be verified, with increasing test force, for the complementary series of measurements for the smalles
43、t 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 force indicator of the testing machineg m/s2local acceleration due to gravityk coverage factor used to calculate the expanded uncer
44、tainty from the com-bined uncertaintym kg mass of dead weights used to generate a calibration forceq % mean relative indication error of the force-measuring system of the testing machine2 ISO 2018 All rights reservedBS EN ISO 7500-1:2018ISO 75001:2018Symbol Unit Meaningqi% the ithmeasurement of the
45、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 error determined at a crossover point using fo
46、rce-proving instrument 1qT2% relative indication error determined at a crossover point using force-proving instrument 2r N resolution of the force indicator of the testing machineuc% combined uncertaintyui% uncertainty componenturep% uncertainty component due to repeatabilityures% uncertainty compon
47、ent due to resolutionustd% uncertainty component due to the calibration standard usedU % expanded uncertainty of incremental forcesU % expanded uncertainty of decremental forcesUT1% expanded uncertainty using force-proving instrument 1 at a crossover pointUT2% expanded uncertainty using force-provin
48、g instrument 2 at a crossover pointv % relative reversibility error of the force-measuring system of the testing ma-chineairkg/m3density of airmkg/m3density of the dead weights5 General inspection of the testing machineThe calibration of the testing machine shall only be carried out if the machine i
49、s 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 as indicated in Annex A.NOTE Good metrological 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 Calibra
