Troubleshooting of constant temperature and humidity test box

1. If the low temperature of the constant temperature and humidity test chamber cannot meet the test indicators, then you need to observe the changes in temperature. Whether the temperature drops slowly or there is a trend of temperature rise after reaching a certain value, the former needs to check whether the chamber is dried before conducting the low temperature test. After keeping the chamber dry, the test sample is placed in the chamber before conducting the test, and whether there are too many test samples placed in the chamber, After eliminating the above reasons, it is necessary to consider whether it is a malfunction in the refrigeration system, as the air in the studio cannot be fully circulated. The latter phenomenon is caused by the poor operating environment of the equipment, and the temperature and location of the equipment should meet the requirements.

2. In the high-temperature test, if the temperature change cannot reach the test temperature value, the electrical system can be checked and faults can be eliminated one by one. If the temperature rises very slowly, check the air circulation system to see whether the regulating baffle of air circulation is opened normally. Otherwise, check whether the motor of air circulation is running normally. If the temperature overshoot is severe, it is necessary to adjust the PID setting parameters. If the temperature rises directly and there is over temperature protection, then if the controller malfunctions, the control instrument must be replaced.

3. During the humidity and heat test conducted in a constant temperature and humidity test chamber, the actual humidity may reach 100% or the actual humidity may differ significantly from the target humidity, with much lower values. The former phenomenon may be caused by the drying of the gauze on the wet bulb sensor. Therefore, it is necessary to check whether there is a shortage of water in the water tank of the wet bulb sensor. The water level in the water tank is automatically controlled by a water level controller, and check whether the water supply system of the water level controller is normal, Whether the water level controller works normally. Another possibility is that wet bulb gauze may become hard due to prolonged use or the purity of the water supply, making it unable to absorb moisture and dry. Simply replacing or cleaning the gauze can eliminate the above phenomenon. The latter phenomenon is mainly that 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 everything above is normal, then it is necessary to check the electrical control system, which requires professional maintenance personnel for maintenance.

4. When a sudden malfunction occurs during the operation of the constant temperature and humidity test chamber, the corresponding fault display prompt and sound alarm prompt appear on the control instrument. Operators can quickly check which type of fault belongs to in the chapter on troubleshooting during equipment operation and use, and then ask professional personnel to quickly troubleshoot to ensure the normal operation of the test. Other environmental testing equipment may have other phenomena during use, so it is necessary to analyze and eliminate specific phenomena.

The constant temperature and humidity test chamber - environmental testing equipment needs regular maintenance, the condenser of the refrigeration system needs to be cleaned regularly, moving parts should be lubricated according to the instructions, and the electrical control system needs to be regularly maintained and inspected. These tasks are essential.