How to solve the failure of the high and low temperature test chamber? -Huaqiang Electronic Network

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Basic troubleshooting methods for high and low temperature test chambers:

1. When operating a high and low temperature test chamber, if the temperature does not reach the desired set point during a high-temperature test, start by checking the electrical system to identify and resolve any issues. If the temperature rises too slowly, it may indicate a problem with the air circulation system. Ensure that the airflow control damper is functioning properly and check the fan motor for any faults. If the temperature exceeds the target value, adjust the PID settings on the controller. In cases where the temperature rises rapidly and triggers an over-temperature protection, it could indicate a faulty controller, which should be replaced immediately.

2. If the equipment fails suddenly during operation, the control panel will display a fault code and trigger an alarm. Operators should refer to the troubleshooting section in the user manual to identify the issue. For more complex problems, it's recommended to contact a qualified technician for assistance. Each environmental testing device may exhibit different behaviors, so it's important to analyze the specific situation and take appropriate action. Regular maintenance is essential for all such equipment. This includes cleaning the condenser of the refrigeration system, lubricating moving parts as specified, and inspecting the electrical control system periodically. These steps are crucial for ensuring long-term performance and reliability.

3. If the low-temperature test chamber fails to reach the required temperature, observe how the temperature changes. If it increases very slowly or starts rising after reaching a certain point, first verify whether the test chamber was properly dried before the test. The chamber must remain dry, and the samples should be placed correctly to allow full air circulation. Overloading the chamber can restrict airflow, leading to inefficient cooling. If the issue persists, it might be due to a fault in the refrigeration system, and professional service from Hongzhan Instrument Factory should be sought. If the temperature rises after reaching a certain level, it could be caused by improper placement of the equipment. Ensure that the ambient temperature and the distance between the back of the cabinet and the wall meet the manufacturer's specifications.

4. During a damp heat test in a Hongzhan high and low temperature chamber, if the actual humidity reaches 100% or significantly differs from the target humidity, it could be due to a dry gauze on the wet bulb sensor. Check the water tank of the sensor to ensure there is enough water. The water level is usually controlled automatically, so confirm that the water level controller is working properly and that the water supply system is functioning. Another possible cause is hardened gauze due to prolonged use or impure water, which reduces its ability to absorb moisture. Replacing or cleaning the gauze should resolve the issue. If the humidity is much lower than expected, the humidification system may not be working. Check the water supply, the water level control in the humidifier, and the overall condition of the system. If everything appears normal, the problem may lie in the electrical control system, which should be inspected by trained professionals.