The ultraviolet aging test chamber simulates the damage of natural sunlight and moisture to the material, and reproduces the damage caused by sunlight, rain and dew. By simulating the environment of ultraviolet radiation and moisture, the material is tested for weathering resistance to evaluate the light resistance and moisture resistance of the material. The ultraviolet aging test box light source uses 8 ultraviolet fluorescent lamps with a rated power of 40W as the light source. Ultraviolet fluorescent lamps are distributed on both sides of the machine, with four on each side. There are UVA-340 and UVB-313 light sources for users to choose and configure. The advantages of fluorescent lamps are: fast access to test results; simplified illumination control; stable spectrum; less maintenance; inexpensive and reasonable operating costs.
Since the energy output of the UV lamp will gradually decay with time, in order to reduce the impact of the test due to the attenuation of the light energy, this test box is used for every quarter of the life of the fluorescent lamp in the eight lamps (the lamp life is: 500 Hours), a new tube replaces an old tube, so the UV light source is always composed of new and old lamps, so as to get a constant output of light energy.
The main reason is that the fluorescent ultraviolet lamp used in the ultraviolet aging test box will gradually reduce its output power and the wavelength will drift during long-term use, so that the expected effect cannot be achieved. The fluorescent principle of fluorescent ultraviolet lamps is the same as that of fluorescent lamps in our lives. When used for a long time, the two ends of the lamp tube will appear black, the light becomes dark, and the light flickers. This shows the amount of radiation or sterilization of the lamp tube. The function is gradually decreasing, or even disappearing. When the light energy radiation of the fluorescent ultraviolet lamp is reduced outside the 70% range, the user needs to replace the eight fluorescent ultraviolet lamps in the box according to the relevant standards to ensure the performance of the equipment.
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