This guide presents techniques on the use of thermocouples and associated equipment for measuring temperature in creep and stress-rupture testing in air at temperatures up to 1800°F (1000°C).

Since creep and stress-rupture properties are highly sensitive to temperature, users should make every effort practicable to make accurate temperature measurements and provide stable control of the test temperature. The goal of this guide is to provide users with good pyrometric practice and techniques for precise temperature control for creep and stress-rupture testing.

Techniques are given in this guide for maintaining a stable temperature throughout the period of test.

If the techniques of this guide are followed, the difference between "indicated"³ temperature and "true"⁴ temperature will be reduced to the lowest practical level.