1、July 2017 English price group 20No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.140.30!%h?“2692888www.din.deDIN
2、EN ISO 6789-2Assembly tools for screws and nuts Hand torque tools Part 2: Requirements for calibration and determination of measurement uncertainty (ISO 67892:2017);English version EN ISO 67892:2017,English translation of DIN EN ISO 6789-2:2017-07Schraubwerkzeuge Handbettigte DrehmomentSchraubwerkze
3、uge Teil 2: Anforderungen an die Kalibrierung und die Bestimmung der Messunsicherheit (ISO 67892:2017);Englische Fassung EN ISO 67892:2017,Englische bersetzung von DIN EN ISO 6789-2:2017-07Outils de manoeuvre pour vis et crous Outils dynamomtriques commande manuelle Partie 2: Exigences dtalonnage et
4、 dtermination de lincertitude de mesure (ISO 67892:2017);Version anglaise EN ISO 67892:2017,Traduction anglaise de DIN EN ISO 6789-2:2017-07Together withDIN EN ISO67891:201707,supersedesDIN EN ISO 6789:200310See start of applicationwww.beuth.deDocument comprises 48 pagesDTranslation by DIN-Sprachend
5、ienst.In case of doubt, the German-language original shall be considered authoritative.07.17 DIN EN ISO 6789-2:2017-07 2 A comma is used as the decimal marker. Start of application The start of application of this standard is 2017-07-01. For DIN EN ISO 6789:2003-10 there is a transition period endin
6、g on 2018-03-31. National foreword This document (ISO 6789-2:2017) has been prepared by Technical Committee ISO/TC 29 “Small tools”, Subcommittee SC 10 “Assembly tools for screws and nuts, pliers and nippers”. The responsible German body involved in its preparation was DIN-Normenausschuss Werkzeuge
7、und Spannzeuge (DIN Standards Committee Tools and Clamping Devices), Working Committee NA 121-05-01 AA “Assembly tools for screws and nuts, Fastening tools”. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 6789-1 DIN EN ISO 6789-1 DIN EN I
8、SO 6789 consists of the following parts, under the general title Assembly tools for screws and nuts Hand torque tools: Part 1: Requirements and methods for design conformance testing and quality conformance testing: minimum requirements for declaration of conformance; Part 2: Requirements for calibr
9、ation and determination of measurement uncertainty. This document includes national footnotes rendering it more precise and correcting mistakes. Amendments This standard differs from DIN EN ISO 6789:2003-10 as follows: a) ISO 6789:2003 has been subdivided into two parts. ISO 6789:2003 has become ISO
10、 6789-1 and specifies the requirements for design and manufacture including the content of a declaration of conformance. This document (ISO 6789-2) specifies the requirements for traceable certificates of calibration. It includes a method for calculation of uncertainties and provides a method for ca
11、libration of the torque measurement device used for calibrating hand torque tools. b) This document contains detailed methods for calculation of the uncertainty budget which shall be performed for each individual tool. c) This document includes example calculations that are provided for different ty
12、pes of torque tool. d) Annex C provides requirements for calibrating the torque measurement device where the calibration laboratory does not utilize a national standard giving such requirements. DIN EN ISO 6789-2:2017-07 3 Previous editions DIN ISO 6789: 1988-05, 1993-12 DIN 7454: 1988-05 DIN EN ISO
13、 6789: 2013-10 DIN EN ISO 6789-2:2017-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6789-2 March 2017 ICS 25.140.30 Supersedes EN ISO 6789:2003English Version Assembly tools for screws and nuts - Hand torque tools - Part 2: Requirements for calibratio
14、n and determination of measurement uncertainty (ISO 6789-2:2017) Outils de manoeuvre pour vis et crous - Outils dynamomtriques commande manuelle - Partie 2: Exigences dtalonnage et dtermination de lincertitude de mesure (ISO 6789-2:2017) Schraubwerkzeuge - Handbettigte Drehmoment-Werkzeuge - Teil 2:
15、 Anforderungen an die Kalibrierung und die Bestimmung der Messunsicherheit (ISO 6789-2:2017) This European Standard was approved by CEN on 14 January 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the s
16、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,
17、 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
18、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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tu
19、rkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
20、 Ref. No. EN ISO 6789-2:2017 EEuropean foreword .3Introduction 51 Scope . 62 Normative references 63 Terms, definitions and symbols 63.1 Terms and definitions . 73.2 Symbols, designations and units . 74 Requirements for calibration 94.1 Calibration during use 94.2 Calibration method 94.3 Calibration
21、 system . 95 Measurement error 105.1 Calculation of the relative measurement error 105.2 Exemplary calculations of the relative measurement error . 105.2.1 Example 1 105.2.2 Example 2 116 Sources of uncertainty . 126.1 General 126.2 Evaluation of Type B uncertainties due to the torque tool 136.2.1 S
22、cale, dial or display resolution, r .136.2.2 Variation due to the reproducibility of the torque tool, brep156.2.3 Variation due to the interface between the torque tool and the calibration system166.2.4 Variation due to the variation of the force loading point, bl.176.3 Evaluation of Type A uncertai
23、nty due to the torque tool 186.3.1 General. 186.3.2 Variation due to the repeatability of the torque tool, bre187 Determination of the calibration result 187.1 Determination of the relative standard measurement uncertainty, w.187.2 Determination of the relative expanded measurement uncertainty, W .1
24、97.3 Determination of the relative measurement uncertainty interval, W .198 Calibration certificate 20Annex A (informative) Calculation example for an indicating torque tool (Type I) .21Annex B (informative) Calculation example for a setting torque tool (Type II) .29Annex C (normative) Minimum requi
25、rements for the calibration of the torque measurement device and the estimation of its measurement uncertainty .37Bibliography .44Contents PageDIN EN ISO 6789-2:2017-07 EN ISO 6789-2:2017 (E) 2Foreword .4European foreword This document (EN ISO 6789-2:2017) has been prepared by Technical Committee IS
26、O/TC 29 “Small tools”. 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 2017, and conflicting national standards shall be withdrawn at the latest by March 2018. Attention is drawn to the
27、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 6789:2003. According to the CEN-CENELEC Internal Regulations, the national stand
28、ards 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, Italy, Latvia, Lithuania, Lu
29、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6789-2:2017 has been approved by CEN as EN ISO 6789-2:2017 without any modification. DIN EN ISO 6789-2:2017-07 EN
30、 ISO 6789-2:2017 (E)3 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. Each member body interested in a
31、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 International Electrotechnical Commission
32、 (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 different types of ISO documents should
33、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 not be held responsible for ide
34、ntifying 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 information given for the con
35、venience 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 Organization (WTO) principles in the Te
36、chnical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nippers.This first edition of ISO 6789-2, together with ISO 6789-1, c
37、ancels and replaces ISO 6789:2003 which has been technically revised with changes as follows.a) ISO 6789:2003 has been divided into two parts. ISO 6789:2003 has become ISO 6789-1 which specifies the requirements for design and manufacture including the content of a declaration of conformance. This d
38、ocument specifies the requirements for traceable certificates of calibration. It includes a method for calculation of uncertainties and provides a method for calibration of the torque measurement device used for calibrating hand torque tools.b) This document includes detailed methods for calculation
39、 of the uncertainty budget which shall be performed for each individual tool.c) This document includes example calculations that are provided for different types of torque tool.d) Annex C provides requirements for calibrating the torque measurement device where the calibration laboratory does not ut
40、ilize a national standard giving such requirements.A list of all parts in the ISO 6789 series can be found on the ISO website.DIN EN ISO 6789-2:2017-07 EN ISO 6789-2:2017 (E) 4 IntroductionThe revision of ISO 6789:2003 has been designed to achieve the following improvements.ISO 6789 has been split t
41、o provide two levels of documentation. It recognizes the different needs of different users of the standard.ISO 6789-1 continues to provide designers and manufacturers with relevant minimum requirements for the development, production and documentation of hand torque tools.This document provides det
42、ailed methods for calculation of uncertainties and requirements for calibrations. This will allow users of calibration services to more easily compare the calibrations from different laboratories. Additionally, minimum requirements for the calibration of torque measurement devices are described in A
43、nnex C.The purpose of this document is to define the requirements for a calibration in which the sources of uncertainty are evaluated and used to define the range of values within which the readings probably fall. Additional uncertainties may exist in the use of the torque tool. The evaluation of un
44、certainties for each individual tool is time-consuming and where there are sufficient data to estimate the Type B uncertainty components by statistical means, it is acceptable to use these values for a given model of torque tool, providing that the uncertainty components are subject to periodic revi
45、ew.DIN EN ISO 6789-2:2017-07 EN ISO 6789-2:2017 (E)5 1 ScopeThis document specifies the method for the calibration of hand torque tools and describes the method of calculation of measurement uncertainties for the calibration.This document specifies the minimum requirements for the calibration of the
46、 torque measurement device where the relative measurement uncertainty interval, Wmd, is not already provided by a traceable calibration certificate.ISO 6789 is applicable for the step by step (static) and continuous (quasi-static) calibration of torque measurement devices, the torque of which is def
47、ined by measuring of the elastic form change of a deformable body or a measured variable which is in proportion to the torque.This document applies to hand torque tools which are classified as indicating torque tools (Type I) and setting torque tools (Type II).NOTE Hand torque tools covered by this
48、document are the ones identified in ISO 1703:2005 by reference numbers 6 1 00 11 0, 6 1 00 11 1 and 6 1 00 12 0, 6 1 00 12 1 and 6 1 00 14 0, 6 1 00 15 0. ISO 1703 is currently under revision. In the next edition, torque tools will be moved to an own clause, and with this change the reference numbers will also change and additional reference numbers will be added.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this d
