1. During the high temperature test of the constant temperature and humidity test box, if the temperature change does not reach the test temperature value, you can check the electrical system and eliminate the fault one by one. If the temperature of the constant temperature and humidity test chamber rises very slowly, it is necessary to check the air circulation system to see if the adjustment baffle of the wind circulation is opened normally, otherwise, check whether the motor of the wind circulation is operating normally. If the temperature overshoot is severe, then the PID setting parameters need to be adjusted. If the temperature rises directly and the over-temperature protection, then the controller fails, the control instrument must be replaced.
2. When the low temperature of the constant temperature and humidity test chamber does not reach the test index, then you have to observe the temperature change, whether the temperature drops slowly, or the temperature has a tendency to rise after the temperature reaches a certain value, the former should check. Whether to dry the studio before doing the low temperature test, keep the studio dry, and then put the test samples into the work room for testing, whether the test samples in the work room are placed too much, so that the wind in the work room cannot be fully circulated. After eliminating the above reasons, it is necessary to consider whether it is a fault in the refrigeration system, so it is necessary to ask the manufacturer's professional personnel for maintenance. The latter phenomenon is caused by the bad use environment of the constant temperature and humidity test chamber equipment. The ambient temperature of the equipment and the location (the distance between the back of the box and the wall) must meet the requirements (there are provisions in the equipment operation instructions ).
3. 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 former phenomenon: it may be caused by the dry gauze on the wet ball sensor. It is necessary to check whether the water tank of the wet bulb sensor is short of water. The water level in the water tank is automatically controlled by a water level controller. Check whether the water supply system of the water level controller is normal and whether the water level controller is working properly. Another possibility is that the wet ball gauze will harden the gauze due to the long use time or the purity of the water supply, so that the gauze can not absorb the water and dry. Just replace or clean the gauze to eliminate the above phenomenon. 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, whether there is a certain amount of water in the water supply system, whether the water level control to control the water level of the humidification boiler is normal, and whether the water level in the humidification boiler is normal . If all of the above is normal, then check the electrical control system, which requires professional maintenance personnel to carry out maintenance.
4. When the constant temperature and humidity test chamber suddenly fails during the test operation, the corresponding fault display prompt will appear on the control instrument and there will be an audible alarm prompt. The operator can quickly check which type of fault belongs to the chapter of troubleshooting in the operation and use of the device, and then you can ask a professional to quickly troubleshoot to ensure that the test is carried out normally. There will be other phenomena in the use of other environmental test equipment, then specific phenomena, specific analysis and elimination are required.
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