UV aging test chamber common faults and solutions

UV aging test chamber will appear this or that problem in the daily operation. The following Huakai Xiaobian specifically for everyone to introduce:

First, the UV lamp does not light up.

Ultraviolet test mainly depends on the UV lamp to irradiate the product, so the UV lamp source is very important. In order to ensure the stability and uniformity of the light source, our company chooses to use imported lamp sources, such as the US Q-Lab, or ATLAS, but it also cannot To ensure that there are no problems at all, we know that BMW cars are good, but there are also after sales, the same reason.

When the UV lamp is in use, sometimes the lamp does not light up, and sometimes the point is bright, which seriously affects the test. Mainly because the fluorescent ultraviolet aging test box is generally used electronic ballasts, the electronic ballast connection method for the jack type. Therefore, sometimes the processing of the details of the production process is not very good, which leads to the existence of weak points in the connection of the lamp corners to the electronic ballast. In the future use, of course, intermittent off-line, poor contact and other issues occur. Manufacturers should focus on improving the defects.

Second, the two black UV lamp hair.

Mainly because the lamp of the UV lamp is tungsten, its melting point is 3410°C. When we light the lamp, the temperature is between 2000 and 3000°C, the filament will not melt, sublimation will occur, then the sublimated tungsten vapor Tungsten is solidified in the tube wall and turns black, and the filament of the UV lamp is on both ends of the tube, so only two ends turn black. When the UV lamp starts to turn black, it needs to be replaced. Therefore, in order to better extend the life of the lamp, Kosaide Xiaobian recommends not to start and shut down the lamp frequently. According to the standard, the lamp does not turn off the lamp within 3 hours after the lamp is lit.

Third, the UV sink rust wear.

The sink of the UV aging chamber is used to hold water for heating, simulating a condensing environment of nature at night. Because the sink is made of stainless steel, when using the equipment, the user must add deionized water, ie, distilled water, according to the standard of use, because if tap water is used. The use of the equipment for about three years will cause the sink to corrode because of the quality of the water and the water being heated. This will cause the sink to rust, and it will rust through the sink and require major repairs.

On the other hand, we all know that the heating pipe is made of stainless steel pipe filled with magnesium powder. If the user uses tap water without using deionized water in order to save the small cost, the heating pipe will be soaked in tap water after long-term high temperature. The stainless steel that causes the surface of the heating tube is corroded and rust appears. It is not worthwhile because of small losses.

Fifth, the instrument failure rate is high.

The instrument of the UV aging tester is installed at the top of the device, so there is a problem: when the device is heated (sometimes a test will be done for several days or even several weeks, the temperature of the laboratory can reach 60°C). Some laboratories do not install air conditioners, and the heat rises again, so the instrument will suffer from high temperature for a long time. Under this high temperature environment, the instrument will be prone to failure.

Article Tags: UV aging box aging test chamber

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