Basic troubleshooting methods for high and low temperature test chambers:
1. When using high and low temperature test equipment, if the temperature does not reach the desired value during a high-temperature test, start by checking the electrical system to identify and resolve any faults. If the temperature rises very slowly, check the air circulation system. Ensure that the airflow control damper is functioning properly and that the fan motor is operating as expected. If the temperature exceeds the set point, adjust the PID parameters accordingly. In cases where the temperature rises rapidly and triggers an over-temperature protection, it may indicate a faulty controller, which should be replaced immediately.
2. If the high and low temperature test equipment fails suddenly during operation, the control panel will display an error message along with an audible alarm. The operator should refer to the fault diagnosis section in the user manual to determine the type of issue. Once identified, professional maintenance should be sought promptly to restore normal operation. Different environmental testing equipment may exhibit unique issues, so each case requires specific analysis and resolution. Regular maintenance is essential for all environmental test equipment. This includes cleaning the condenser of the refrigeration system, lubricating moving parts according to the manufacturer's guidelines, and conducting routine checks on the electrical control system. These steps ensure long-term reliability and performance.
3. If the low-temperature test chamber fails to reach the required test temperature, first observe the temperature behavior. If the temperature increases very slowly or begins to rise after reaching a certain point, check whether the test chamber was properly dried before the test. It is important to keep the chamber dry and avoid placing too many samples inside, as this can restrict airflow and reduce cooling efficiency. If the issue persists, it could indicate a problem with the refrigeration system, which should be addressed by a qualified technician. In some cases, the problem may stem from improper placement of the equipment—ensure that the ambient temperature and the distance between the back of the unit and the wall meet the manufacturer’s specifications.
4. During damp heat testing in a high and low temperature chamber, if the actual humidity reaches 100% or significantly differs from the target value, investigate the cause. A common issue is a dry wick on the wet bulb sensor. Check the water level in the sensor’s water tank, which is usually controlled automatically. Verify that the water supply system is functioning correctly and that the water level controller is working as intended. Another possible cause is a hardened or dirty wick due to prolonged use or poor water quality, which prevents proper moisture absorption. Cleaning or replacing the wick can resolve this issue. If the humidity is much lower than expected, the humidification system may be at fault. Check the water supply, the boiler water level control, and the overall functionality of the humidification system. If no issues are found, consult a professional technician to inspect the electrical control system.
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