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ASTM E434-71(2002)

Historical Revision

Standard Test Method for Calorimetric Determination of Hemispherical Emittance and the Ratio of Solar Absorptance to Hemispherical Emittance Using Solar Simulation

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1.1 This test method covers measurement techniques for calorimetrically determining the ratio of solar absorptance to hemispherical emittance using a steady-state method, and for calorimetrically determining the total hemispherical emittance using a transient technique.

1.2 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.


This test method covers measurement techniques for calorimetrically determining the ratio of solar absorptance to hemispherical emittance using a steady-state method, and for calorimetrically determining the total hemispherical emittance using a transient technique. The main elements of the apparatus include a vacuum system, a cold shroud within the vacuum chamber, instrumentation for temperature measurement, and a solar simulator. Any type of coating may be tested by this test method provided its structure remains stable in vacuum over the temperature range of interest. The substrate shall be machined from flat stock and to a size proportioned to the working area of the chamber.


SDO ASTM: ASTM International
Document Number E434
Publication Date June 21, 1971
Language en - English
Page Count 6
Revision Level 71(2002)
Supercedes
Committee E21.04
Publish Date Document Id Type View
Nov. 1, 2010 E0434-10 Revision
June 21, 1971 E0434-71R02 Revision
Nov. 1, 2020 E0434-10R20 Reaffirmation
Oct. 1, 2015 E0434-10R15 Reaffirmation
June 21, 1971 E0434-71R96E01 Reaffirmation