Table A22-2 Artificial weathering test parameters Exposure parameters Air–cooled lamp lamp Light/dark/water spray cycle Continuous light without water Continuous light without spray water spray Black standard temperature (47 ± 3) °C using a black (47 ± 3) °C using a black during light only periods standard thermometer standard thermometer Relative humidity Approximately 40 % Approximately 40 % Filters Window glass filters Window glass filters requirements see requirements see paragraph paragraph 5.2. 5.2. Irradiance (W/m²) controlled at: Over 300nm to 400nm range 42±2 42±2 Over 300nm to 800nm range 550 630 Water used for the specimen spray should contain no more than 1 ppm silica. Higher levels Note 1: of silica can produce spotting on samples and variability in results. Water of the required purity can be obtained by distillation or by a combination of deionization and reverse osmosis. While irradiance levels should be set at the above levels, variations in filter ages and Note 2: transmissivity, and in calibration variations, will generally mean that irradiance error will be in the order of ± 10 per cent. 5.2. Light source The source shall consist of a xenon arc lamp of correlated colour temperature 5500 K to 6500 K, the size of which will depend on the type of apparatus used. The xenon-arc lamp shall use filters that provide a reasonable simulation of solar radiation filtered by typical window glass. Table 3 gives the relative spectral irradiance requirements for the filtered xenon-arc. It is the responsibility of the supplier of the exposure device to provide necessary certification that the filters that they supply for use in the exposure tests described in this standard meets the requirements of Table A22-3. Table A22-3 Relative spectral irradiance requirements for window glass filters a, b, c, d, e used for the devices used in this standard. Spectral Bandpass CIE No.85, Table 4 plus window Wavelength in nm Minimum % c glass % d, e Maximum % c λ l < 300 0.29 300 320 0.1 2.8 ≤ λ ≤ ≤1 320 < 360 23.8 33.1 35.5 λ ≤ 360 < 62.4 66.0 76.2 λ ≤400
Table A22-2 Artificial weathering test parameters Exposure parameters Air–cooled lamp lamp Light/dark/water spray cycle Continuous light without water spray Continuous light without water spray Black standard temperature during light only periods (47 ± 3) °C using a black standard thermometer (47 ± 3) °C using a black standard thermometer Relative humidity Approximately 40 % Approximately 40 % Filters Window glass filters requirements see paragraph 5.2. Window glass filters requirements see paragraph 5.2. Irradiance (W/m²) controlled at: Over 300nm to 400nm range 42±2 42±2 Over 300nm to 800nm range 550 630 Note 1: Water used for the specimen spray should contain no more than 1 ppm silica. Higher levels of silica can produce spotting on samples and variability in results. Water of the required purity can be obtained by distillation or by a combination of deionization and reverse osmosis. Note 2: While irradiance levels should be set at the above levels, variations in filter ages and transmissivity, and in calibration variations, will generally mean that irradiance error will be in the order of ± 10 per cent. 5.2. Light source The source shall consist of a xenon arc lamp of correlated colour temperature 5500 K to 6500 K, the size of which will depend on the type of apparatus used. The xenon-arc lamp shall use filters that provide a reasonable simulation of solar radiation filtered by typical window glass. Table 3 gives the relative spectral irradiance requirements for the filtered xenon-arc. It is the responsibility of the supplier of the exposure device to provide necessary certification that the filters that they supply for use in the exposure tests described in this standard meets the requirements of Table A22-3. Table A22-3 Relative spectral irradiance requirements for window glass filters a, b, c, d, e used for the devices used in this standard. Spectral Bandpass Wavelength λ in nm Minimum % c CIE No.85, Table 4 plus window glass % d, e Maximum % c l < 300 0.29 300 ≤ λ ≤ 320 0.1 ≤1 2.8 320 < λ ≤ 360 23.8 33.1 35.5 360 < λ ≤400 62.4 66.0 76.2
ECE-TRANS-WP29-2018-159e.docx