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ASTM E638

78th Edition, January 1, 1978

Complete Document

Standard Test Method for Calibration of Heat Transfer Rate Calorimeters Using a Narrow-Angle Blackbody Radiation Facility

Includes all amendments and changes through Reapproval Notice , 1992


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Product Details:

  • Revision: 78th Edition, January 1, 1978
  • Published Date: January 1992
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 5
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:



1. Scope

1.1 This test method covers employing the narrow beam of thermal energy emitted through the aperture of a blackbody to calibrate calorimetric devices. Although the calorimeter normally responds to incident heat which is predominantly convective, this method of calibration employs radiant energy. Use of radiant energy dictates that the absolute value of radiant flux at the surface of the calorimeter be determined to provide an accurate calibration. This method, applicable in place of the wide-angle source technique, is suited to relatively low values of irradiance (typically less than 106 W/m2)

1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibililty of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.