Evaluation of a commercial, portable, ambient‐temperature emissometer

摘要: The DevicesS an uncertainty of ±0.014 units was determined. These repeatability and accuracy values were confirmed by a round‐robin investigation using two working standards whose e’s measured three independent laboratories model AE emissometers four that used absolute methods. instrument shown to measure the total hemispherical e, not normal e. Experimental difficulties encountered during measurements on very anisotropic material in determinations materials with transparencies less than 0.1. Critical procedural steps are discussed.