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Interpreting solutions to 4 common problems in constant temperature and humidity test chambers

Author:QINSUN Released in:2023-06 Click:125

1. When the constant temperature and humidity test chamber suddenly breaks down during the test operation, the corresponding fault display prompt will appear on the control instrument, and there will be a prompt audio alarm. The operator can quickly check which type of fault it belongs to in the troubleshooting chapter in the operation and use of the equipment, and then instruct the personnel to quickly troubleshoot the fault to ensure the normal progress of the test. There will be other phenomena in the use of other environmental testing equipment, so it is necessary to analyze and eliminate specific phenomena.

 2. During the high temperature test, if the temperature change does not reach the test temperature value, you can check the electrical system and eliminate the faults one by one. If the temperature of the constant temperature and humidity test chamber increases very slowly, it is nIt is necessary to check the air circulation system to see if the air circulation regulating louver is open normally, if not, check if the air circulation motor works normally. If the temperature overshoot is severe, then it is necessary to adjust the PID tuning parameters. If the temperature rises directly, the regulator is faulty and the control instrument must be replaced.

3. During the damp heat test in the constant temperature and humidity test chamber, the actual humidity will reach 100% or the actual humidity is very different from the target humidity, and the value is much lower. The first phenomenon: it may be the wet bulb sensor. If the gauze is dry, check for lack of water in the wet bulb sensor tank. The water level in the tank is automatically controlled by a water level controller. Check if the water supply system of thewater level controller is normal and whether the water level controller is working normally. Another possibility is that the wet ball gauze hardens the gauze due to the long use time or the purity of the water system, which may make the gauze unable to absorb water and dry out. You only need to replace or clean the gauze to eliminate the above phenomena. The latter phenomenon is mainly that the humidification system of the constant temperature and humidity test chamber does not work. Check the water supply system of the humidification system to see if there is a certain amount of water in the water supply system, whether the water level control to control the water level the humidification boiler is normal and if the water level in the humidification system the boiler is normal. . If all of the above is normal, check the electrical control system and ask service personnel.nance to revise it.

4. If the low temperature of the constant temperature and humidity test box does not reach the test index, you should observe the temperature change to distinguish whether the temperature drops very slowly or the temperature tends to rise after have reached a certain value. The first should be checked, if the studio is dried before the test at low temperature, so that the studio is kept dry, then the test samples are placed in the studio for the test, and if the test samples in the studio are placed too much, so that the wind cannot circulate completely. After eliminating the above reasons, it is necessary to determine whether it is a failure of the refrigeration system. In this way, it is necessary to ask the personnel of the manufacturer to carry out the maintenance. The latter phenomenon is caused by the poor operating environment of the test chamber equipment toconstant temperature and humidity. The ambient temperature and the location of the equipment (the distance between the back of the box and the wall) must meet the requirements (there are provisions in the instructions for use of the equipment) ).