BS EN ISO 4892-3:2016 pdf free
/FREESPACE2ULSTANDARDSPDF/ISO/BS-EN-ISO-4892-3-2016.rar
Fluorescent UV lamps are fluorescent lamps in which radiant emission in the ultraviolet region of the spectrum, i.e. below 400 nm, makes up at least 80 % of the total light output. There are three types of fluorescent UV lamp used in this part of ISO 4892.
UVA-340 (type 1A) fluorescent UV lamp: these lamps have a radiant emission below 300 nm of less than 1 % of the total light output, have an emission peak at 343 nm, and are more commonly identified as UVA-340 for simulation of global solar radiation from 300 nm to 340 nm (see Table 1).Figure A.1 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-340 (type 1A) fluorescent lamp compared to global solar radiation.UVA-351 (type 1B) fluorescent UV lamp: these lamps have a radiant emission below 310 nm of less than 1 % of the total light output, have a peak emission at 353 nm, and are more commonly identified as UVA-351 for simulation of the UV portion of solar radiation behind window glass (see Table 2). Figure A.2 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-351 (type 1B) fluorescent UV lamp compared to global solar radiation filtered by window glass.
UVB-313 (type 2]) fluorescent UV lamp: these lamps are more commonly identified as UVB-313 and have a radiant emission below 300 nm that is more than 10 % of the total output and a peak emission at 313 nm (see Table 3). Figure A.3 is a graph of the spectral irradiance from 250 nm to 400 nm of two typical UVB-313 (type 2) fluorescent lamps compared to global solar radiation. UVB-313 (type 2) lamps may be used only by agreement between the parties concerned. Such agreement shall be stated in the test report.
Four different UV lamps used as one combination: these four different UV lamps are used together as one combination with a suited filter. See Figure A.4 in A.2.3.BS EN ISO 4892-3 pdf free download.
