NF EN ISO 6789-2

NF EN ISO 6789-2

May 2017
Standard Current

Assembly tools for screws and nuts - Hand torque tools - Part 2 : Requirements for calibration and determination of measurement uncertainly

ISO 6789-2:2017 specifies the method for the calibration of hand torque tools and describes the method of calculation of measurement uncertainties for the calibration. ISO 6789-2:2017 specifies the minimum requirements for the calibration of the torque measurement device where the relative measurement uncertainty interval, W´md, 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 defined by measuring of the elastic form change of a deformable body or a measured variable which is in proportion to the torque. ISO 6789-2:2017 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 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.

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Main informations

Collections

National standards and national normative documents

Publication date

May 2017

Number of pages

53 p.

Reference

NF EN ISO 6789-2

ICS Codes

25.140.30   Hand-operated tools

Classification index

E74-325-2

Print number

1

International kinship

European kinship

EN ISO 6789-2:2017
Sumary
Assembly tools for screws and nuts - Hand torque tools - Part 2 : Requirements for calibration and determination of measurement uncertainly

ISO 6789-2:2017 specifies the method for the calibration of hand torque tools and describes the method of calculation of measurement uncertainties for the calibration.

ISO 6789-2:2017 specifies the minimum requirements for the calibration of the torque measurement device where the relative measurement uncertainty interval, md, 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 defined by measuring of the elastic form change of a deformable body or a measured variable which is in proportion to the torque.

ISO 6789-2:2017 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 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.

Replaced standards (1)
NF EN ISO 6789
September 2003
Standard Cancelled
Assembly tools for screws and nuts - Hand torque tools - Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure

<p>ISO 6789:2003 specifies the requirements for, and describes the test methods and marking of, hand torque tools used for controlled tightening of bolted connections.</p> <p>It applies in particular to indicating and setting torque wrenches in accordance with numbers 258 and 259 of ISO 1703:1983.</p>

Table of contents
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  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes, définitions et symboles
  • 4 Exigences d'étalonnage
  • 5 Erreur de mesure
  • 6 Sources d'incertitude
  • 7 Détermination du résultat d'étalonnage
  • 8 Certificat d'étalonnage
  • Annexe A Exemple de calcul pour un outil dynamométrique à lecture directe (Type I)
  • Annexe B Exemple de calcul pour un outil dynamométrique à déclenchement (Type II)
  • Annexe C Exigences minimales applicables à l'étalonnage du dispositif de mesure du couple et à l'estimation de son incertitude de mesure
  • Bibliographie
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