Basic troubleshooting methods for high and low temperature test chambers:
1. When operating a high and low temperature test chamber, if the temperature fails to reach the desired test value during a high-temperature test, start by inspecting the electrical system and addressing any faults step by step. If the temperature rises slowly, check the air circulation system to ensure that the airflow control damper is functioning correctly. If the issue persists, inspect the circulation fan motor to confirm it's working properly. If the temperature becomes too high, adjust the PID settings on the controller. In cases where the temperature rises rapidly and triggers an over-temperature protection, the controller may have failed, and it should be replaced by a qualified technician.
2. If the high and low temperature test equipment suddenly malfunctions during testing, the control panel will display a fault code, and an alarm will sound. The operator should refer to the troubleshooting section in the user manual to identify the issue and contact a professional technician for assistance. Different environmental testing equipment may exhibit unique issues, so each problem should be analyzed individually. Regular maintenance is essential for all environmental test equipment. This includes cleaning the condenser of the refrigeration system, lubricating moving parts as specified, and regularly checking the electrical control system. These steps are crucial for ensuring reliable performance and extending the equipment’s lifespan.
3. If the low-temperature test chamber fails to reach the required test temperature, observe the temperature behavior. If the temperature increases very slowly or starts rising after reaching a certain point, first verify whether the test chamber was properly dried before the test. Ensure that the chamber remains dry and that samples are placed in the working area without blocking airflow. Overloading the chamber can restrict air circulation, leading to inaccurate results. If the issue continues, it may indicate a problem with the refrigeration system, which should be addressed by a trained service engineer from Hongzhan Instrument Factory. If the temperature rises after reaching a certain level, it could be due to improper placement of the equipment. Check that the ambient temperature and the space around the unit (such as the distance between the back of the cabinet and the wall) meet the manufacturer’s specifications.
4. During damp heat testing with the Hongzhan high and low temperature chamber, if the actual humidity reaches 100% or deviates significantly from the target humidity, there are several possible causes. If the humidity is at 100%, it may be due to the drying of the wet bulb gauze. Check the water tank of the wet bulb sensor for sufficient water. The water level is controlled automatically by a level controller, so ensure the water supply system is functioning properly. Another possibility is that the gauze has become hard due to long-term use or poor water quality, preventing it from absorbing moisture. Replacing or cleaning the gauze can resolve this issue. If the humidity is much lower than expected, the humidification system might not be working. Check the water supply in the humidification system, the water level control, and the boiler’s water level. If all systems appear normal, the issue may lie within the electrical control system, which should be inspected and repaired by a qualified technician.
Proper maintenance and timely troubleshooting are key to ensuring accurate and consistent performance of high and low temperature test chambers. Always follow the manufacturer’s guidelines and consult professionals when necessary to avoid further damage or safety risks.
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