Ultraviolet accelerated aging test chamber will appear this or that problem in the daily operation. The following Ai Si Xiao Xiaobian specifically introduces us:
1. 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 is no problem 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. The main reason for this is that electronic fluorescent ballasts are commonly used in fluorescent UV accelerated weathering test chambers. The connection of electronic ballasts is a 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 some defects.
Two. UV lamp black 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, which is solidified in the tube wall and decomposed, 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.
Three. UV sink rust wear.
The sink of the UV-accelerated aging chamber is used to hold water for heating, simulating a condensation environment in nature at night. Since the sink is made of stainless steel, when using the equipment, the user must add deionized water, ie, distilled water, according to the use standard, because if tap water is used. The use of the equipment for about three years will cause the sink to corrode due to the formation of water and water after it is heated, causing the sink to rust and rusting through to the sink, which requires extensive 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 in order to save the small cost of unauthorized use of tap water instead of the use of deionized water, the heating pipe after long-term high temperature soaked in tap water, will The stainless steel that causes the surface of the heating tube is corroded and rust appears. It is not worthwhile because of small losses.
Four. Instrument failure rate is high.
The instruments of the UV accelerated weathering tester are installed on the equipment, so there is a problem: when the equipment is heated (sometimes one test will last for several days or even several weeks, the temperature in 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. In this high temperature environment, the instrument is prone to failure.
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