Black standard thermometer for xenon lamp weather resistance test box

Xenon lamp weather resistance test chamber can reproduce the damage caused by sunlight, rain and dew in a few days or weeks. The equipment test sample holder rotates around the light source at a speed of 1r / min. A black standard thermometer is installed on the sample holder. The control black standard thermometer uses wireless transmission technology to effectively improve the control accuracy.

When the black standard thermometer and the sample are irradiated at the same position of the sample holder, the black standard temperature is similar to the temperature of the dark sample with poor thermal conductivity. This thermometer is made of flat stainless steel with a length of 70 mm, a width of 40 mm, and a thickness of 1 mm. The side of the flat panel facing the light source is coated with an anti-aging black flat coating. The coated blackboard absorbs at least 95% of the total incident light flux within 2500 nm. Use a platinum resistance sensor to measure the plate temperature. The sensor is installed on the side of the backlight and has good thermal contact with the center of the tablet. This side of the metal plate is fixed with a 5mm thick, grooved polyvinylidene fluoride (PVDF) base so that it only forms a space in the sensor range. The distance between the sensor and the groove of the PVDF plate is about 1mm. The length and width of the PVDF plate must be large enough to ensure that there is no metal contact between the metal plate and the sample holder when the black standard thermometer is installed on the sample holder. The metal support on the sample holder is at least 4 mm away from the edge of the metal plate.

In order to determine the temperature range of the sample surface and better control the irradiance and test conditions of the equipment, it is recommended to use a white standard thermometer in addition to a black standard thermometer. The white standard thermometer has the same design as the black standard thermometer. It replaces the black flat coating with an aging-resistant white coating. The absorption of the white coating is at least 90% lower than that of the black flat coating in the range of 300 ~ 1000nm, and at least 60% in the range of 1000 ~ 2500nm.

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