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If the temperature of a constant temperature and humidity equipment does not meet the test's specifications, you must observe the change in temperature, whether it is a very slow temperature drop, or whether the temperature rises after the temperature reaches a certain value. The former must be checked before doing the low temperature test. Whether the studio is dried, the studio is kept dry, and then the test sample is placed in the working chamber and tested again. The test sample in the working chamber is placed too much, so that the air in the working chamber cannot be fully circulated, after eliminating the above reasons. , we must consider whether it is a fault in the refrigeration system, so we must ask the factory's professionals for maintenance. The latter phenomenon is caused by the poor use environment of the equipment. The ambient temperature of the equipment and the location of the equipment (the distance between the cabinet and the wall) must meet the requirements (both are specified in the equipment operating instructions).
In the constant temperature, humidity, humidity and heat test, the actual humidity will be reached or the actual humidity and the target humidity will differ greatly. The value is much lower. The former phenomenon may be caused by dry gauze on the wet ball sensor. Then check the wet bulb. Whether the water tank in the sensor is lack of water, the water level in the water tank is controlled automatically by a water level controller, check whether the water supply system of the water level controller is normal, and whether the water level controller works normally. Another possibility is that the wet ball gauze may cause the gauze to become hard due to the long use time or the purity of the water supply, so that the gauze cannot absorb moisture and dry, and the above phenomenon can be eliminated only by replacing or cleaning the gauze. The latter phenomenon is mainly because the humidification system is not working. Check the water supply system of the humidification system. Whether there is a certain amount of water in the water supply system. Control whether the water level of the humidifying boiler water level is normal and whether the water level in the humidifying boiler is normal. If all of the above is normal, then check the electrical control system, which requires professional maintenance personnel to perform maintenance.
When the constant temperature and humidity test equipment suddenly fails during the test operation, a corresponding fault display prompt appears on the control instrument and there is a voice alarm prompt. The operator can quickly check which type of fault belongs to in the troubleshooting chapter of the operation of the equipment, and then the professional can quickly eliminate the fault to ensure the normal operation of the test. Other environmental test equipment will have other phenomena in use, it must be specific phenomena, specific analysis and exclusion.
High-low temperature test chamber or constant temperature and humidity test chamber should also be regularly maintained. The condenser of the refrigeration system should be regularly cleaned. For the moving parts, lubrication should be done according to the instructions, and the electrical control system should be regularly maintained and checked. These tasks are indispensable. .
Constant temperature and humidity In the high temperature test, if the temperature does not reach the test temperature, the electrical system can be checked and the faults can be eliminated one by one. If the temperature rises very slowly, it is necessary to look at the air circulation system and see if the adjustment baffle of the air circulation is normally open. Conversely, check whether the motor operation of the air circulation is normal. If the temperature overshoots badly, then you need to set the PID setting parameters. If the temperature rises directly, over-temperature protection, then the controller fails and the control instrument must be replaced.