Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation

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PDF

Language(s)

English

Published date

15-08-2011

Publisher

American Society for Testing and Materials

CONTAINED IN VOL. 12.02, 2015 Specifies the calculation of luminous (photometric) transmittance and reflectance of materials from spectral radiant transmittance and reflectance data obtained from Test Method E 903.

1.1 This practice describes the calculation of luminous (photometric) transmittance and reflectance of materials from spectral radiant transmittance and reflectance data obtained from Test Method E903.

1.2 Determination of luminous transmittance by this practice is preferred over measurement of photometric transmittance by methods using the sun as a source and a photometer as detector except for transmitting sheet materials that are inhomogeneous, patterned, or corrugated.

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 44
DocumentType	Redline
Pages	5
PublisherName	American Society for Testing and Materials
Status	Current

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ASTM E 971 : 2011 : REDLINE

Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation

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