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Your location: Home > Related Articles > interprets common troubleshooting methods for constant temperature and humidity machines –

interprets common troubleshooting methods for constant temperature and humidity machines –

Author:QINSUN Released in:2023-05 Click:100

1. If the low temperature does not reach the test index, you should observe the temperature change, whether the temperature drops very slowly or the temperature tends to rise after the temperature reaches a certain value , the first should be checked by doing a low temperature test whether to dry the working room before, keep the working room dry, then put the test samples in the working room, then do the test, if the test samples in the work room are placed too much, so that the wind in the work room cannot fully circulate, constant temperature and humidity machine After eliminating the above reasons, it is necessary to determine whether this is a failure of the refrigeration system, so the manufacturer\'s personnel should be advised to revise. The latter phenomenon is caused by the poor operating environment of the equipment. The ambient temperature et the location of the equipment (the distance between the back of the enclosure and the wall) must meet the requirements (this is stipulated in the instructions for use of the equipment).

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 rises very slowly, check the air circulation system to see if the air circulation control 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 overheating protection means that the regulator is faulty and the control instrument must be replaced.

3. In the damp heat test, the actual humidity of the temperature machineconstant temperature and humidity will reach 100% or the actual humidity is very different from the target humidity, and the value is much lower. The old phenomenon: it may be the wet bulb sensor If the gauze on the top is dry, then check if there is a lack of water in the sink of the wet bulb sensor. The water level in the sink is automatically controlled by a water level controller. Check whether the water supply system of the high and low temperature constant temperature and humidity testing machine water level controller is normal. , If the water level controller works normally. Another possibility is that the wet ball gauze hardens the gauze due to the long time of use 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. This last phenomenon is mainly that thehumidification system not working. 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 humidification boiler is normal and the water level in the humidification boiler is normal. If all of the above is normal, check the electrical control system and ask maintenance personnel to overhaul it.

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