What to do if the hottest high and low temperature

2022-07-18
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What should I do if the high and low temperature test chamber fails

basic troubleshooting methods for high and low temperature test chamber:

I. high and low temperature test equipment In the high temperature test, if the temperature change can not reach the test temperature value, the electrical system can be checked. 4. The dual control mode system of computer control and manual control is adopted. The main problem is the materials used, and the faults can be eliminated one by one. If the temperature rises slowly, check the air circulation system to see if 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, the controller fails and the control instrument must be replaced

II When the high and low temperature test equipment breaks down suddenly during the test operation, the corresponding fault display prompt and audible alarm prompt will appear on the control instrument. The operator can quickly check the type of fault according to the chapter "troubleshooting in the operation and use of the equipment", and then ask professional personnel to quickly eliminate the fault, so as to ensure the normal operation of the test. Other environmental test equipment: many people buy machines at an optimal price. There will be other phenomena in use, so it is necessary to analyze and eliminate specific phenomena. The environmental test equipment should also be regularly maintained, the condenser of the refrigeration system should be regularly cleaned, the moving parts should be lubricated according to the instructions, the electrical control system should be regularly maintained and inspected, etc. these works are essential

III. If the low temperature of the high and low temperature test instruments can not meet the test indicators, you should observe the temperature changes. Is the temperature falling very slowly, or does the temperature tend to rise after reaching a certain value, For the former, check whether the working room is dried before the low-temperature test. After the working room is kept dry, put the test samples into the working room for test. Check whether there are too many test samples in the working room, so that the air in the working room can not be fully circulated. After eliminating the above reasons, consider whether it is a fault in the refrigeration system. In this way, 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)

IV. the correct method for protection and maintenance of the high and low temperature box in the damp heat test: during the 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 bulb sensor, so it is necessary 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, 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 long service time or the purity of water supply quality, so that the gauze cannot absorb water and dry. The above phenomenon can be eliminated as long as the gauze is replaced or cleaned. The latter phenomenon is mainly that the humidification system does not work. Check the water supply system of the humidification system to see 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 should be overhauled by professional maintenance personnel

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