UV Weathering Chamber Temperature Control I. UV Cycles Photochemical reactions at one level are not sensitive to temperature changes. However, the subsequent rate of secondary reactions is closely related to temperature changes. In general, the reaction speed increases as the temperature increases. Therefore, during the UV exposure test, the temperature control is very important. It is more important to match the test temperature used in the accelerated test with the highest temperature encountered in the actual application. The UV temperature setting in the device can be anywhere from 50°C to 80°C, depending on the level of illuminance and the ambient ambient air temperature. The temperature adjustment of the device is accomplished through a series of systems such as an air heater, a water heater, and the like that are commanded by a controller having a microcomputer calculation function.
Second, the humidity cycle With the increase of temperature, the destructive power of wet materials will increase dramatically. Therefore, during the humidity exposure process, temperature control is the most basic requirement. Further, to produce an acceleration effect, it is required to maintain a high temperature environment during the humidity exposure. The condensation process temperature setting in the equipment can be anywhere from 40°C to 60°C.
Third, the heating system U-type titanium alloy high-speed heating electric heating tube;
Temperature control and lighting completely independent system;
The temperature control output power is calculated by the microcomputer to achieve the high-efficiency and high-efficiency electricity efficiency.
Anti-overheating function with heating system;
The temperature of the black aluminum plate is controlled by the intelligent Korean temperature controller. The output power is calculated by the microcomputer and the PID is self-tuned. Monitoring uses standard Pt-100 blackboard temperature sensor;
The temperature of the water tank is also controlled by the Korean temperature controller. The water tank is located in the lower part of the tank and has a built-in electric water heater. During the cycle test, there is a test section that is a dark condensation process that requires saturated steam that generates higher temperatures in the tank. When the water vapor encounters a relatively cold sample surface, dew condensation occurs on the surface of the sample.
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