GSO ASTM C1549:2022
Gulf Standard
Current Edition
·
Approved on
12 May 2022
·
Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer
GSO ASTM C1549:2022 Files
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GSO ASTM C1549:2022 Scope
1.1 This test method covers a technique for determining the
solar reflectance of flat opaque materials in a laboratory or in
the field using a commercial portable solar reflectometer. The
purpose of the test method is to provide solar reflectance data
required to evaluate temperatures and heat flows across surfaces exposed to solar radiation.
1.2 This test method does not supplant Test Method E903
which measures solar reflectance over the wavelength range
250 to 2500 nm using integrating spheres. The portable solar
reflectometer is calibrated using specimens of known solar
reflectance to determine solar reflectance from measurements
at four wavelengths in the solar spectrum: 380 nm, 500 nm,
650 nm, and 1220 nm. This technique is supported by
comparison of reflectometer measurements with measurements
obtained using Test Method E903. This test method is applicable to specimens of materials having both specular and
diffuse optical properties. It is particularly suited to the
measurement of the solar reflectance of opaque materials.
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.
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