Structural characteristics of ultraviolet aging test box
In the natural environment, we often see ultraviolet light and ultraviolet rays. The damage to human skin can be experienced in the hot summer, not to mention the damage to the products we use in the natural environment. Below we give an introduction to the structure of the UV aging test box. I believe you will have a deeper understanding of its structure.
1. The structure of the test box is made of corrosion-resistant metal materials, including 8 fluorescent ultraviolet lamps, water tray, test sample holder and temperature and time control system and indicator.
2. Lamp power 40W, lamp length 1200㎜. The range of the uniform working area of ​​the test box is 900 × 210㎜.
3. The lamps are installed in a row of four, divided into two rows, the lamp tubes of each row of lamps are installed in parallel, and the center distance of the lamps is 70㎜.
4. The test sample is fixedly installed at a position 50 mm away from the nearest parallel surface of the lamp surface. The test sample and its bracket form the inner wall of the box, and their backs are exposed to the cooling air at room temperature. . To allow stable condensation conditions on the surface of the test sample during condensation, the test box should generate natural air convection from the bottom through the outer wall of the box and the channel of the test sample.
5. Water vapor is generated by the water tray with a low heating box, the water depth is not more than 25㎜, and there is an automatic water supply controller. The water tray should be cleaned regularly to prevent scale formation.
6. The temperature of the test box is measured by a sensor fixed on a width of 75㎜, height of 100㎜, and thickness of 2.5㎜. The black aluminum plate (blackboard) should be placed in the center area of ​​the exposure test. The measurement range of the thermometer is 30 ～ 80 ℃, tolerance is ± 1 ℃. The control of light and condensation stage should be carried out separately, the condensation stage is controlled by heating water temperature.
7. The test chamber should be placed in a test room with a temperature of 15 to 35 ° C, 300 mm away from the wall, and should be protected from the influence of other heat sources. The air in the test room should not circulate violently, so as not to affect the light and condensation conditions.
With a better understanding of the structure, we can conduct better tests when possible to achieve the best test results.
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