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ASTM E 408 : 1971 : R2008

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

01-05-2008

1.1 These test methods cover determination of the total normal emittance (Note) of surfaces by means of portable, inspection-meter instruments.

Note 1—Total normal emittance (εN) is defined as the ratio of the normal radiance of a specimen to that of a blackbody radiator at the same temperature. The equation relating εN to wavelength and spectral normal emittance [εN (λ)] is


where:
L b(λ, T) = Planck's blackbody radiation function = c1π 1λ5(ec2/λT 1)1,
c1 = 3.7415 × 1016 W·m 2,
c2 = 1.4388 × 102 m·K,
T= absolute temperature, K,
λ= wavelength, m,
Lb(λ, T)dλ = Δπ 1T4, and
Δ = Stefan-Boltzmann constant = 5.66961 × 10 8 W·m2·K4

1.2 These test methods are intended for measurements on large surfaces when rapid measurements must be made and where a nondestructive test is desired. They are particularly useful for production control tests.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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.

Committee
E 21
DocumentType
Test Method
Pages
3
ProductNote
Reconfirmed 2008
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

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$108.03
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