White Stablity Temperature Humidity Test Chamber High and Low Tempearture Storage c

Application

The chamber used to test the performance of materials in various environments and to test the heat, cold,

dry and moisture resistance of various materials. For electronic, electrical appliances, mobile phones,

communications, meters, vehicles, plastic products, metals, food, chemicals, building materials, medical,

aerospace and other products used for testing quality. Meet the standards: GB/T5170.5-2008,

GB/T10586-2006, GB/T2423.1-2008 Test A, GB/T2423.2-2008 Test B, GB/T2423.3-2006 Test Ca,

GB/T2423 .4-2008 Test Db

Other specification

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Control method

Balanced temperature and humidity control system (BTHC) controls SSR in a P.I.D. mode so that the

system's heating humidification amount is equal to the heat and moisture loss, so it can be used stably for

a long period of time.

Slow cooling and solutions

1. Analysis of Non-refrigeration of Constant Temperature and Humidity Chamber and Solution to

Temperature and Humidity Test Chamber Failure

First of all, look at whether the constant temperature and humidity test chamber is running at low

temperature for a long time. When the programmable constant temperature and humidity test chamber

finishes the low temperature operation, the evaporator freezes. It is better to perform drying at about 60°C

for about 30 minutes. Open the door, this time can solve the problem that the constant temperature and

humidity box does not cool.

2. Constant temperature and humidity box electrical appliances, circuits are operating normally. Since the

temperature of the constant temperature and humidity chamber cannot be maintained, it is observed

whether the refrigeration compressor can be started during the operation of the test chamber and the

compressor can be started during the operation of the environmental test equipment. Shanghai Hairui

Instrument Co., Ltd. explains that from the main power supply to each compression The electrical circuit of

the machine is normal, and there is no problem with the electrical system.

3. There is no problem with the electrical system and check the refrigeration system again. First of all, it is

checked that the exhaust and suction pressures of low-temperature (R23) compressors of the two sets of

refrigeration units are lower than normal and the suction pressure is in a pumped-out state, indicating that

the amount of refrigerant in the main refrigeration units is insufficient.