Description

This standard deals with the calibration at room temperature and grading of extensometers used in tension and compression testing. It defines the terms used and describes the standard method of calibration; the requirements for calibrating devices are stated. Extensometers are graded in terms of repeatability of gauge length, and readability, repeatability and accuracy of indicated extension.

Instructions for the issue of reports of calibration are included together with recommendations on certain constructional features of extensometers and the use of calibrating equipment.

Also included are comprehensive tables of grading requirements for a wide range of values of strain and extension for extensometers of nominal gauge lengths 25, 50, 100 and 200 mm.

Scope