1.1 本指南涵盖了用于测量静态应变的应变片的选择和应用，静态应变高达425℃（包括425℃） °C至650 摄氏度（800 °F至1200 °F）。本指南反映了高温应变测量中的一些最先进技术。 1.2 本指南假设用户熟悉中所述的粘结应变计和相关信号调节电路及仪器的使用 ( 1. ) 和 ( 2. ). 2. 所描述的应变计系统已被证明在感兴趣的温度范围内有效，并且在本指南发布时可用。本指南的目的不是将用户限制为所描述的应变仪类型之一，也不是指定用于特定应用的应变仪系统类型。然而，在使用任何应变计系统（包括所述应变计系统）时，提议人应能够证明所提议的应变计系统的能力，以满足第节中提供的选择标准 5. 以及特定应用的需要。 1.3 本指南中描述的设备和技术有时可适用于高于和低于所述范围的温度，并用于在采取适当预防措施的情况下在高温下进行动态应变测量。应向应变计制造商咨询此类应用的建议和细节。 1.4 在文本规定的范围内，参考文献是本指南的一部分。 1.5 以公制（SI）单位表示的数值应视为标准。括号中给出的值仅供参考。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 本指南的使用是自愿的，旨在作为高温装置特定类型应变片的选择和应用程序指南。没有试图限制由用户选择的应变计类型或概念的类型。可以在规范和程序中援引本指南的规定，具体说明为特定应用目的应被视为强制性的规范和程序。当被援引时，用户应在工作说明书中注明，出于相关规范或程序的目的，作为建议显示的本指南条款应被视为强制性的，并应包括对本指南受影响条款的任何例外情况或修改的说明。

1.1 This guide covers the selection and application of strain gages for the measurement of static strain up to and including the temperature range from 425 °C to 650 °C (800 °F to 1200 °F). This guide reflects some state-of-the-art techniques in high-temperature strain measurement. 1.2 This guide assumes that the user is familiar with the use of bonded strain gages and associated signal conditioning circuits and instrumentation as discussed in ( 1 ) and ( 2 ). 2 The strain gage systems described are those that have proven effective in the temperature range of interest and were available at the time of issue of this guide. It is not the intent of this guide to limit the user to one of the strain gage types described nor is it the intent to specify the type of strain gage system to be used for a specific application. However, in using any strain gage system including those described, the proposer shall be able to demonstrate the capability of the proposed strain gage system to meet the selection criteria provided in Section 5 and the needs of the specific application. 1.3 The devices and techniques described in this guide can sometimes be applicable at temperatures above and below the range noted, and for making dynamic strain measurements at high temperatures with proper precautions. The strain gage manufacturer should be consulted for recommendations and details of such applications. 1.4 The references are a part of this guide to the extent specified in the text. 1.5 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are for informational purposes only. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 The use of this guide is voluntary and is intended for use as a procedures guide for selection and application of specific types of strain gages for high-temperature installations. No attempt is made to restrict the type of strain gage types or concepts to be chosen by the user. The provisions of this guide may be invoked in specifications and procedures by specifying those that shall be considered mandatory for the purpose of the specific application. When so invoked, the user shall include in the work statement a notation that provisions of this guide shown as recommendation shall be considered mandatory for the purposes of the specification or procedure concerned, and shall include a statement of any exceptions to or modifications of the affected provisions of this guide.