What should I do if the high and low temperature chamber fails?
High and low temperature test box basic troubleshooting method:
First, the high and low temperature test equipment. In the high temperature test, if the temperature change does not reach the test temperature value, you can check the electrical system and eliminate the fault one by one. If the temperature rises very slowly, it is necessary to look at the air circulation system and see if the adjustment baffle of the air circulation is normal, otherwise, check the motor of the air circulation.
Is it working properly? If the temperature overshoots badly, then you need to set the PID setting parameters. If the temperature rises directly, over-temperature protection, then the controller fails and the control instrument must be replaced.
2. When the high-low temperature test equipment suddenly fails during the test operation, the control instrument displays a corresponding fault display prompt and a voice alarm. The operator can quickly check which type of fault belongs to in the troubleshooting chapter of the operation of the equipment, and then the professional can quickly eliminate the fault to ensure the normal operation of the test. Other environmental test equipment will have other phenomena in use, it must be specific phenomena, specific analysis and exclusion. The environmental test equipment shall also be regularly maintained. The condenser of the refrigeration system shall be regularly cleaned. The mobile parts shall be lubricated according to the instructions, and the electrical control system shall be regularly maintained and inspected. These tasks are indispensable.
Third, high and low temperature test equipment can not reach the test index, then you have to observe the temperature changes, the temperature drop is very slow, or the temperature rises after a certain temperature, the former must check, do low temperature Whether the studio is to be dried before the test, so that the studio is kept dry and then the test sample is placed in the work chamber and then tested. Whether the test sample in the work chamber is placed too much and the wind in the work chamber cannot be sufficiently circulated, eliminating the above After the reason, it is necessary to consider whether it is a fault in the refrigeration system. In this case, it is necessary to ask the factory's professionals to perform the repair. The latter phenomenon is caused by the poor use environment of the equipment. The ambient temperature of the equipment and the location of the equipment (the distance between the cabinet and the wall) must meet the requirements (in the operating instructions of the equipment).
Fourth, high and low temperature box in the heat test, the actual humidity will reach 100% or the actual humidity and the target humidity is very different, the value is much lower, the former phenomenon: may be caused by dry gauze wet bulb sensor, then To check whether there is water shortage in the water tank of the wet bulb sensor, the water level in the water tank is automatically controlled by a water level controller. The water level controller water supply system checks whether the water supply is normal and whether the water level controller is working properly. Another possibility is that the wet ball gauze may cause the gauze to become hard due to the long use time or the purity of the water supply, so that the gauze cannot absorb moisture and dry, and the above phenomenon can be eliminated only by replacing or cleaning the gauze. The latter phenomenon is mainly because the humidification system is not working. Check the water supply system of the humidification system. Whether there is a certain amount of water in the water supply system. Control whether the water level of the humidifying boiler water level is normal and whether the water level in the humidifying boiler is normal. If all of the above is normal, then check the electrical control system, which requires professional maintenance personnel to perform maintenance.
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