Temperature and humidity test chamber common faults and troubleshooting methods

Temperature and humidity test chamber common faults and troubleshooting methods

1. In the high temperature test, if the temperature change does not reach the test temperature value, the electrical system can be inspected and the faults can be eliminated one by one. If the temperature rises very slowly, it is necessary to check the air circulation system to see if the regulating baffle of the wind cycle is normal. On the contrary, check whether the motor of the wind cycle is running normally. If the temperature is too high, you need to set the PID setting parameters. If the temperature rises directly and the temperature is over-protected, then the controller fails and the control instrument must be replaced.

2. If the low temperature does not reach the test index, then observe the temperature change. It is the temperature drop is very slow, or the temperature has a tendency to rise after the temperature reaches a certain value. The former should check whether the studio is dried before the low temperature test, keep the studio dry and then put the test sample into the work room and then do the test. The test sample in the work room is placed too much, so that the wind in the work chamber Can not fully circulate, 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 professional staff of the factory for maintenance. The latter phenomenon is caused by the poor use of the equipment. The ambient temperature at which the equipment is placed and the location where it is placed (the distance between the back of the cabinet and the wall) must meet the requirements (as specified in the operating instructions for the equipment).

3. In the damp heat test, the actual humidity will reach 100% or the actual humidity will be very different from the target humidity. The value is much lower. The former phenomenon may be caused by the drying of the gauze on the wet bulb sensor. Whether the water in the water tank of the ball sensor is lacking, 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 the water level controller works normally. Another possibility is that the wet ball gauze will be hardened due to the long use time or the purity of the water supply, so that the gauze can not absorb moisture and be dry. The above phenomenon can be eliminated by replacing or cleaning the gauze. The latter phenomenon is mainly because the humidification system 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 of the humidification boiler water level is normal, and whether the water level in the humidification boiler is normal. If all of the above are normal, then you need to ask the professional maintenance personnel to check the electrical control system and carry out maintenance.

4. When the equipment suddenly fails during the test operation, the corresponding fault display prompt appears on the control meter and there is an audible alarm prompt. The operator can quickly check which type of fault belongs to the troubleshooting chapter in the operation of the equipment, and then ask the professional to quickly eliminate the fault to ensure the normal operation of the test. Other environmental testing equipment will have other phenomena in use, and it will be specific phenomena, specific analysis and elimination. The temperature and humidity test chamber should also be regularly maintained. The condenser of the refrigeration system needs to be cleaned regularly. The moving parts should be lubricated according to the instructions, and the electrical control system should be regularly maintained and checked. These tasks are essential.

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