ASTM E971-11(2019) PDF

Scope: 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E971-11(2019) Referenced Document

ASTM E1175 Standard Test Method for Determining Solar or Photopic Reflectance, Transmittance, and Absorptance of Materials Using a Large Diameter Integrating Sphere*， 2022-10-01 Update
ASTM E772 Standard Terminology Relating to Solar Energy Conversion
ASTM E903 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
ASTM E972 Standard Test Method for Solar Photometric Transmittance of Sheet Materials Using Sunlight*， 2021-01-01 Update
ASTM G173 Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface*， 2023-03-01 Update

2019 ASTM E971-11(2019) Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation
2011 ASTM E971-11 Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation
1988 ASTM E971-88(2003) Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation
1996 ASTM E971-88(1996)e1 Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation