ASTM E903-20
Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres

Standard No.

ASTM E903-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E903-20

Scope

1.1 This test method covers the measurement of spectral absorptance, reflectance, and transmittance of materials using spectrophotometers equipped with integrating spheres. 1.2 Methods of computing solar weighted properties from the measured spectral values are specified. 1.3 This test method is applicable to materials having both specular and diffuse optical properties. 1.4 This test method is applicable to material with applied optical coatings with special consideration for the impact on the textures of the material under test. 1.5 Transmitting sheet materials that are inhomogeneous, textured, patterned, or corrugated require special considerations with respect to the applicability of this test method. Test Method E1084 may be more appropriate to determine the bulk optical properties of textured or inhomogeneous materials. 1.6 For homogeneous materials this test method is preferred over Test Method E1084. 1.7 This test method refers to applications using standard reference solar spectral distributions but may be applied using alternative selected spectra as long as the source and details of the solar spectral distribution and weighting are reported. 1.8 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. 1.9 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 E903-20 Referenced Document

• ASTM E1084 Standard Test Method for Solar Transmittance (Terrestrial) of Sheet Materials Using Sunlight*， 2023-05-01 Update
• 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 E2554 Standard Practice for Estimating and Monitoring the Uncertainty of Test Results of a Test Method Using Control Chart Techniques
• ASTM E275 Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers
• ASTM E424 Standard Test Methods for Solar Energy Transmittance and Reflectance (Terrestrial) of Sheet Materials*， 2023-05-01 Update
• ASTM E490 Standard Solar Constant and Zero Air Mass Solar Spectral Irradiance Tables*， 2022-04-01 Update
• ASTM E772 Standard Terminology Relating to Solar Energy Conversion
• ASTM E971 Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation
• ASTM G173 Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface*， 2023-03-01 Update
• ASTM G197 Standard Table for Reference Solar Spectral Distributions: Direct and Diffuse on 20° Tilted and Vertical Surfaces*， 2021-07-01 Update

ASTM E903-20 history

• 2020 ASTM E903-20 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
• 2012 ASTM E903-12 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
• 1996 ASTM E903-96 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres