JJG 879-2015 English PDF (JJG879-2015)

This Regulation applies to initial verification, subsequent verification and in-use inspection for standard-level, level-1 and level-2 ultraviolet radiometers that comply with the division of ultraviolet radiation UV-A, UV-B, UV-C, UV-A1, UV-365, UV-310, UV-254 bands. 2 Overview The International Commission on Illumination (CIE) divides ultraviolet radiation into three bands: UV-A (315nm~400nm), UV-B (280nm~315nm) and UV-C (100nm~280nm). Since ultraviolet radiation of 100nm~200nm is strongly absorbed in the air, for the UV-C band, this Regulation only considers the wavelength range of 200nm~280nm. Ultraviolet radiometer that complies with the ultraviolet radiation UV-A, UV-B, UV-C, UV-A1, UV-365, UV-310, and UV-254 band divisions is an instrument used to measure ultraviolet radiometer. It is widely used in fields such as medical treatment, epidemic prevention, optoelectronics, flaw detection, electric light sources, chemical industry, building materials, meteorology, material aging and aerospace. It mainly consists of detector, amplifier circuit and display instrument. The detector generally consists of a photodetector device, a filter (bandpass glass or interference filter) and a diffuser. Figure 1 is a schematic diagram of the general structure of an ultraviolet radiometer detector. Figure 1 -- Schematic diagram of the general structure of an ultraviolet radiometer detector Diffuser Light filter UV radiation Photodetector device JJG 879-2015 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 7 of 39 3 Metrology performance requirements 3.1 Spectral response and band division UV-A band: 315nm~400nm, peak wavelength ¦Ëp=365nm¡À5nm; UV-B band: 280nm~315nm, peak wavelength ¦Ëp=297nm¡À5nm; UV-C band: 200nm~280nm, peak wavelength ¦Ëp=254nm¡À5nm; UV-A1 band: 320nm~390nm, peak wavelength ¦Ëp=365nm¡À5nm; UV-365 band: peak wavelength ¦Ëp=365nm¡À2nm, peak half-height width ¦¤¦Ë ¡Ü10nm; UV-310 band: 290nm~320nm, peak wavelength ¦Ëp=310nm¡À5nm; UV-254 band: peak wavelength ¦Ëp=254...