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ASTM E424 PDF
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Standard Test Methods for Solar Energy Transmittance and Reflectance (Terrestrial) of Sheet Materials
| Published by | Publication Date | Number of Pages |
| ASTM | 11/01/2015 | 5 |
ASTM E424 – Standard Test Methods forSolar Energy Transmittance and Reflectance (Terrestrial) ofSheet Materials
1.1 These test methods cover the measurement of solar energy transmittance and reflectance (terrestrial) of materials in sheet form. Method A, using a spectrophotometer, is applicable for both transmittance and reflectance and is the referee method. Method B is applicable only for measurement of transmittance using a pyranometer in an enclosure and the sun as the energy source. Specimens for Method A are limited in size by the geometry of the spectrophotometer while Method B requires a specimen 0.61 m² (2 ft²). For the materials studied by the drafting task group, both test methods give essentially equivalent results.
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