标准摘要
[中文适用范围]： 本文件规定了校准手动力矩工具的方法，并描述了校准时测量不确定度的计算方法。本文件规定了校准扭矩测量装置的最低要求，其中相对测量不确定度区间W' md尚未由可追溯的校准证书提供。ISO 6789适用于分步（静态）和连续（准静态）校准，这些校准基于弹性变形体的弹性形式变化或与转矩成比例的测量变量来定义扭矩。本文件适用于按类型I和类型II分类的手动力矩工具。 [外文原描述]： 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.
英文名称Assembly tools for screws and nuts — Hand torque tools — Part 2: Requirements for calibration and determination of measurement uncertainty