How to solve the slow temperature drop in the high and low temperature test chamber?

When the high and low temperature test chambers do not cool down, firstly reduce the ambient temperature to between 5 °C and 28 °C, and then check whether the air-cooled condenser is too thick and the accumulated dust is too thick. It is necessary to clean the dust on the condenser (purge with a compressed air air gun). If the surface of the condenser is very clean or a new machine, you should watch the reading of the refrigeration pressure gauge. The static pressure will generally be 6 kg (or 90psi, the innermost one of the pressure gauge is above. The pressure in the stop state is as specified in Figure 3. (The black line is marked on the pressure gauge when it is shipped from the factory.) If it is lower, there may be leakage of refrigerant, resulting in insufficient cooling capacity. The refrigeration system needs to be repaired.

How to solve the slow temperature drop in the high and low temperature test chamber?

High and low temperature test box slow cooling solution

1, the studio heat load is too large, the fan does not turn, the door is not closed (leakage)

2. Partial solid state relay breakdown (such as heating with 2 solid state relays and 1 breakdown) causes a part of the heating tube to heat up, which offsets part of the cooling capacity, resulting in a slow cooling artifact.

3. The test specimens in the test chamber are piled up too much (normally, they do not exceed one-third of the total volume of the inner tank), resulting in the wind not being able to circulate and the temperature fluctuating.

How to solve the slow temperature drop in the high and low temperature test chamber?

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