How to Troubleshoot the Failure of a Constant Temperature and Humidity Chamber
If your constant temperature and humidity chamber is unable to reach the required test conditions, start by observing the temperature behavior. If the temperature drops very slowly or begins to rise after reaching a certain point, there could be several underlying causes. In the case of a slow temperature drop, check if the chamber was properly dried before the low-temperature test. Make sure the chamber is dry and that the test samples are not overfilled, as this can hinder airflow circulation. If these factors are ruled out, it may indicate an issue with the refrigeration system, which should be addressed by contacting the manufacturer's technical support for professional assistance.
If the temperature rises after reaching a certain value, this could be due to improper placement of the equipment. Ensure the ambient temperature is within acceptable limits and that there is enough space between the back of the unit and the wall, as specified in the user manual.
When humidity levels either reach 100% or deviate significantly from the target, it often points to issues with the wet bulb sensor. Check if the gauze on the sensor is dry, and confirm that the water tank has sufficient water. The water level controller should be functioning correctly, and the gauze might need cleaning or replacement if it has hardened due to long-term use or poor water quality. For cases where humidity is much lower than expected, the problem may lie in the humidification system. Verify that the water supply is adequate, the boiler’s water level is correct, and the control system is operating properly. If all checks are normal, contact a qualified technician for further diagnosis.
If the chamber suddenly fails during testing and displays an error message or emits an alarm, refer to the fault code section in the user manual to identify the issue. This will help you determine whether it’s a minor problem or one requiring professional repair. Each piece of environmental testing equipment may exhibit different symptoms, so it’s important to analyze each situation individually.
Regular maintenance is crucial for ensuring the long-term performance of high-temperature, low-temperature, or constant temperature and humidity chambers. Clean the condenser coils regularly, lubricate moving parts according to the manufacturer’s instructions, and perform routine inspections of the electrical systems. These steps are essential to prevent unexpected failures and maintain accurate test results.
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