There are six main reasons for the high temperature and low temperature test chamber not to cool down. Please check and repair one by one.
First, determine whether there is a voltage supply compressor
1. Is the AC contactor connected to the compressor unit sucked?
2. Is the wire connecting the compressor broken or not connected properly?
3. Determine whether the voltage meets the rated voltage requirements of the compressor.
Second, determine the current of the compressor group, the current must reach the rated current of the compressor. If the voltage is normal, the current does not meet the requirements, indicating the lack of refrigerant (refrigerant).
3. If the high and low temperature test chamber is a cascade unit, observe whether both units are running. If one unit is not working, it should be stopped immediately. Find out the cause of the compressor that is not working and analyze it.
4. Observe whether the cooling fan of the condenser is working. At work, is the steering of the cooling fan normal? When working normally [industrial electrical network-cnelc] , the wind direction should be blown outward.
5. Determine whether the compressor lacks refrigerant. Use a pressure gauge to observe whether the pressure of the compressor after the current working compressor is normal or the temperature of the high pressure exhaust pipe of the compressor. When normal, the temperature should be very high and hot. In the case of dual-unit refrigeration, it is necessary to determine which compressor lacks refrigerant.
6. Observe whether the circulating fan in the room is working normally. If the burnout does not work, the evaporator cannot evaporate normally, so that it cannot be cooled.
The physical structure of L. SYV is 100% polyethylene insulation; Sywv# for physical foam polyethylene insulated Cable, foaming rate of 70-80%; L. Due to the dielectric loss, the attenuation of SYV solid cable is significantly greater than that of SYWV physical foam cable; Among the commonly used engineering cables, the physical foam cable is still the best transmission performance, the lowest price of the cable, in video, radio frequency, microwave and other bands are so. The test data given by the manufacturer also shows this; L) Library coaxial cable can be used for DC, RF and microwave frequency bands. Differentiating cables by "RF"/" video "is not only insufficient, but also misleading: it seems that solid cables must or can only be selected for video transmission. ; From an engineering perspective, it is more practical to distinguish between "solid" and "foam" cable types; L The characteristic difference between high braided (128) and low braided (64) cables: Yi Aiyi laboratory experimental research shows that in the following frequency band of 200 KHZ, the "low resistance" of high braided cables plays an important role in the shielding layer, so the low frequency transmission attenuation is less than that of low braided cables. However, in the video, RF and microwave frequencies above 200-300 KHZ, the high braided cable has lost the advantage of "low resistance" due to the "high frequency skin effect", so the two high frequency attenuation cables are basically the same.
LRM200 RF Coaxial cables , LMR400 RF Coaxial Cable ,RG58 RF Coaxial Cables ,LMR240 Coaxial cables ,RG174 Cables
Yetnorson Antenna Co., Ltd. , https://www.xhlantenna.com