ASTM C1549测试方法为一个在实验室或现场使用便携式太阳光反射比测定仪测定不透明平面材料的太阳光反射比的测试标准。ASTM C1549测试标准的目的是提供太阳光反射比数据用来评估暴露于太阳辐射下的温度和热流。更多关于ASTM C1549太阳光反射比测试的具体内容，请咨询南京睿督公司 025-8658 3475。

太阳反射比(Solar Reflectance Index，简称SRI)表示
ASTM C1549 Standard test method for determination of solar reflectance Near Ambient Temperature using a portable solar reflectometer.
ASTM C1549 便携式反射率测定仪-常温下材料太阳光反射比的测定

ASTM C1549标准适用范围

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.

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.

3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

ASTM C1549太阳光反射比测试相关标准
ASTM E903反射率测试http://www.fire-test.com/teststandard/usa/7146.html   
ASTM E408发射率测试http://www.fire-test.com/teststandard/usa/7147.html   
ASTM E1980反射系数SRI测试http://www.fire-test.com/teststandard/usa/7148.html  

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