Why Does a Constant Temperature and Humidity Test Chamber Fail to Maintain a Constant Temperature?

A constant temperature and humidity test chamber is designed to maintain stable temperature and humidity conditions. However, there are several reasons why it may fail to maintain a constant temperature. Here are three main causes and their corresponding solutions:

1. Sample Placement Issues
If too many samples are placed inside the chamber and they are too densely packed with minimal spacing, the air inside the chamber will not circulate properly. This can lead to significant temperature fluctuations and prevent the chamber from maintaining a constant temperature. To address this issue, reduce the number of samples and follow the principle of “fewer samples, multiple tests” to ensure proper air circulation.

2. Circulation Fan Issues
The circulation fan is a critical component for maintaining temperature uniformity. If the fan blades are damaged or jammed, the airflow will be irregular, leading to inconsistent temperature distribution. To resolve this, inspect the fan using tools like a screwdriver and multimeter to check for damage or blockage. If necessary, repair or replace the fan blades to restore normal operation.

3. Controller or Sensor Issues
Damage or poor contact with the ACU module (Area Control Unit) can cause temperature instability and fluctuations inside the chamber. If the ACU module is faulty, it is recommended to contact the manufacturer’s after-sales service for replacement.

Importance of Addressing Temperature Instability
Temperature instability during testing is a serious issue, as it directly affects the accuracy of the test results. Any test conducted under such conditions is essentially invalid. Therefore, it is crucial to address temperature instability immediately. Operators should troubleshoot and resolve the issue based on the above information. If further assistance is needed, contacting the manufacturer’s technical support is recommended.

Linpin Instruments, a leading environmental test equipment manufacturer, provides comprehensive technical services to customers. For inquiries about equipment parameters and technical issues, feel free to contact them.