BS PD CEN ISO/TR 17801:2017

BS PD CEN ISO/TR 17801:2017 provides a reference spectrum to the field of weathering degradation (see Table 1)in order to classify solar simulators in the UV, visible and infrared wavelength range.The photochemical ageing which occurs in practice is simulated with time compression in laboratoryweathering instruments by sequencing maximum stress climate episodes. To give a spectral irradiancetarget, the table specifies the spectral irradiance of global radiation (direct and diffuse radiation) witha cloudless sky, zenith position of the sun by day and night comparisons at the equator at sea level asdefined in Table 4 of CIE No. 85 .This is a realistic maximum exposure under representative clear skyconditions.The data contained in Table 1, Figure 2, and Figure 3 were generated using the SMARTS2 Version 2.9.2[2][3] to recalculate the CIE No. 85, Table 4.Table 2 contains the original data from CIE No. 85, Table 4. The numbers are shown in Figure 2 andFigure 3 as well.Cross References:CIE 85:1989Incorporates the following:Corrigendum, March 2017