Condenser for high-low temperature damp heat test chamber should be cleaned regularly
1, in the heat test, the actual humidity will reach 100% or the actual temperature and humidity and the target humidity is very different, the value is many, the former phenomenon: may be caused by dry gauze on the wet ball sensor, then check the wet Whether there is water shortage in the ball sensor water tank, the water level in the water tank is automatically controlled by a water level controller, check whether the water level controller water supply system is normally supplied, whether the water level controller works normally, and another possibility is that the wet ball gauze is used due to time Long, the reasons for the purity of the water supply water will make the gauze hard, so that the gauze can not absorb moisture and dry, as long as the gauze just change or clean the gauze can eliminate the above phenomenon, the latter phenomenon is mainly the humidification system does not work, view the humidification system Water supply system, whether there is a certain amount of water in the water supply system, whether the water level control of the humidifier boiler water level is normal, and whether the water level in the humidification boiler is normal, it is necessary to check the electrical control system, which requires professional maintenance personnel to perform maintenance.
2. When the equipment suddenly fails during the test operation, the control instrument displays a corresponding fault display prompt and there is a voice alarm prompt. The operator can quickly monitor the type of fault that belongs to the category in the troubleshooting chapter of the operation of the control equipment. Failure, you can ask professionals to quickly troubleshoot, to ensure the normal conduct of the test, other environmental testing equipment will have other phenomena in use, it is necessary to specific phenomena, specific analysis and exclusion.
The environmental testing equipment should also be regularly maintained. The condenser of the refrigeration system of the high-low temperature damp heat test chamber should be regularly cleaned, and the moving parts should be lubricated according to the instructions, and the electrical control system should be regularly maintained and checked. These tasks are indispensable.
3, in the high temperature test, if the temperature change does not reach the test temperature value, you can check the electrical system, remove the fault one by one, if the temperature rise is very slow, we must look at the air circulation system, look at the wind circulatory system adjustment baffle Whether it is normal or not, on the other hand, check whether the motor operation of the air circulation is normal. If the temperature overshoot is severe, then you need to set the PID setting parameters. If the temperature rises directly and over-temperature protection occurs, the controller fails and the control instrument must be replaced.
4, low temperature can not reach the test index, then you have to observe the temperature changes, is the temperature rises after a certain value of the temperature trend, the former must check, do low temperature test before the studio to dry, so that work After the chamber is kept dry, the test sample is put into the work chamber and tested again. The test sample in the work chamber is placed too much, so that the air in the work chamber cannot be sufficiently circulated. After excluding the above reasons, it is necessary to consider whether it is in the refrigeration system. The fault, this will require the factory's professionals to repair. The latter phenomenon is caused by the poor use of the environment. The ambient temperature of the equipment and the location of the equipment (the distance between the cabinet and the wall) must meet the requirements (as specified in the operating instructions of the equipment).
Common high and low temperature damp heat test box structure
In addition to the correct operation of the test personnel according to operating procedures, it should also understand its structure, high and low temperature damp heat test chamber from the cabinet, the air circulation system, refrigeration system, heating system and moisture control system, the air circulation system is generally adjustable The structure of the air supply direction, the humidification system has two kinds of surface evaporation using the humidified boiler; cooling, dehumidification system using heating fin heating and electric heating wire direct heating two structures, temperature and humidity testing methods using wet and dry ball testing methods, but also humidity Sensor direct measurement method, control and display operation interface using separate temperature and humidity and temperature and humidity combination controller and other methods.
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