1.1 This practice covers the selection and application of strain gages and associated instrumentation for the measurement of static strain up to and including the temperature range from 425 to 650°C (800 to 1200°F). This practice reflects some current state-of-the-art techniques in high temperature strain measurement, and will be expanded and updated as new technology develops.

1.2 This practice assumes that the user is familiar with the use of bonded strain gages and associated signal conditioning and instrumentation as discussed in Refs. (1) and (2). The strain measuring systems described are those that have proven effective in the temperature range of interest and were available at the time of issue of this practice. It is not the intent of this practice to limit the user to one of the gage types described nor is it the intent to specify the type of system to be used for a specific application. However, in using any strain measuring system including those described, the proposer must be able to demonstrate the capability of the proposed 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 practice may be applicable at temperatures above and below the range noted, and for making dynamic strain measurements at high temperatures with proper precautions. The gage manufacturer should be consulted for recommendations and details of such applications.

1.4 The references are a part of this practice to the extent specified in the text and Appendixes X1 through X5.

1.5 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are for information 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 and health practices and determine the applicability of regulatory limitations prior to use.