ASTM E662 由固体材料产生的烟雾的特定光密度标准试验方法
日期:2012-02-08 11:03
nsity of smoke generated by solid materials and assemblies mounted in the vertical position in thicknesses up to and including 1 in. (25.4 mm).
1.2 Measurement is made of the attenuation of a light beam by smoke (suspended solid or liquid particles) accumulating within a closed chamber due to nonflaming pyrolytic decomposition and flaming combustion.
1.3 Results are expressed in terms of specific optical density which is derived from a geometrical factor and the measured optical density, a measu
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