ASTM International Standard Practice for Internal Temperature Measurements in Low-Conductivity Materials ASTM E377-96(2002)

1.1 This practice covers methods for instrumenting low-conductivity specimens for testing in an environment subject to rapid thermal changes such as produced by rocket motors, atmospheric re-entry, electric-arc plasma heaters, etc. Specifically, practices for bare-wire thermocouple instrumentation applicable to sheath-type thermocouples are discussed. 1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate. 1.3 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.