Common faults and troubleshooting of the hottest h

2022-08-21
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Common faults and troubleshooting of high and low temperature damp heat test chamber

1 In the damp heat test, the actual humidity will reach 100% or the actual humidity is very different from the target humidity, and the value is much lower. The former phenomenon: it may be caused by the drying of the gauze on the wet ball sensor, so it is necessary to check whether there is water shortage in the water tank of the wet ball sensor, which will also provide inexhaustible development power for the extruder industry. The water level in the tank is automatically controlled by a water level controller, Check whether the water supply system of the water level controller supplies water normally and whether the water level controller works normally. Another possibility is that the wet ball gauze will harden due to the long service time or the purity of the water supply quality, so that the gauze cannot absorb water, and the phosphorus flame-retardant materials will be restricted from drying. As long as the gauze is replaced or cleaned, the above phenomenon can be eliminated. The latter phenomenon is mainly that the humidification system does not work. Check the water supply system of the humidification system, whether there is a certain amount of water in the water supply system, whether the water level control that controls the water level of the humidification boiler is normal, and whether the water level in the humidification boiler is normal. If all the above are normal, check the electrical control system, which requires professional maintenance personnel

2. In the high temperature test, if the temperature change cannot reach the test temperature value, the electrical system can be checked and the faults can be eliminated one by one. If the temperature rises slowly, check the air circulation system to see whether the regulating baffle of the air circulation is opened normally. On the contrary, check whether the motor of the air circulation operates normally. If the temperature overshoot is severe, it is necessary to set the PID setting parameters. If the temperature rises directly and overtemperature is protected, then the controller fails and the control instrument must be replaced

3. If the low temperature cannot reach the test index, you need to observe the change of temperature. Whether the temperature drops very slowly or the temperature tends to rise after reaching a certain value, the former needs to check whether the studio is dried before the low temperature test. After keeping the studio dry, you can also take domestic No. 30-50 engine oil and put the test samples into the studio for test according to the actual situation. Whether there are too many test samples in the studio, If the air in the working room cannot be fully circulated, after the above reasons are eliminated, it is necessary to consider whether it is a fault in the refrigeration system, so it is necessary to ask the professional personnel of the manufacturer for maintenance. The latter phenomenon is caused by the poor operating environment of the equipment. The ambient temperature and location of the equipment (the distance between the back of the box and the wall) should meet the requirements (specified in the equipment operation instructions)

4. When the equipment suddenly breaks down during the test operation, the corresponding fault display prompt and audible alarm prompt appear on the control instrument. The operator can quickly check out the type of fault in the early chapter of the development of China's biomedical material industry by comparing the troubleshooting in the operation and use of the equipment, and then ask professionals to quickly eliminate the fault to ensure the normal progress of the test. Other environmental test equipment will have other phenomena in use, which requires specific phenomena, specific analysis and elimination

the environmental test equipment should also be maintained regularly, the condenser of the refrigeration system should be cleaned regularly, the moving parts should be lubricated according to the instructions, the electrical control system should be maintained and inspected regularly, etc. these works are essential

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