Common fault analysis - constant temperature and humidity test chamber
Constant temperature and humidity test chamber: mainly used for high temperature, low temperature, humidity testing, testing of electrical and electronic, LED optoelectronics, chemical, plastic and other products of the reliability of energy, improve product quality. However, in the course of operation, if we encounter temperature and humidity test chamber temperature does not meet the temperature index, low temperature cooling is slow, humidity can not be in accordance with the scheduled operation of the three major faults, our company combined many years of R & D production experience, this made the following detailed analysis, For reference to the user of the constant temperature and humidity test box. Hope to effectively help everyone maintain! Fault two: Fault 3: Constant temperature and humidity test chamber, because of the use of time limit, so long running time constant temperature and humidity chamber, it is inevitable that there will be a variety of minor faults, usually pay attention to regular maintenance and maintenance, generally can be largely avoided. If you encounter a major technical problem, you can contact our company and seek solutions. Cleaning Brush,Washing Brush,Wheel Cleaning Brush,Truck Wash Brush Ningbo Yonghai Auto Products Co., Ltd. , https://www.yonghaistarter.com
Fault one:
When the constant temperature and humidity test box can not reach the test index, how to solve?
The constant temperature and humidity test chamber can not reach the target at low temperature. If the temperature drop is slow, you must observe the temperature change. It is the temperature drop is very slow, or the temperature has a tendency to rebound after the temperature reaches a certain value. The former must check and do the 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 fully circulated, and the above is excluded. After the reasons, 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 constant temperature and humidity chamber 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 equipment operation and use instructions) ).
During the operation of the constant temperature and humidity test chamber, the temperature change cannot reach the test temperature value. How to solve it?
In the high temperature test, if the temperature change does not reach the test temperature value, the electrical system can be checked and the faults can be eliminated one by one. If the temperature of the constant temperature and humidity test chamber rises very slowly, it is necessary to check the wind circulation system to see if the adjustment baffle of the wind circulation is normally open, and conversely, check whether the motor operation of the wind circulation is normal. If the temperature overshoots badly, then you need to set the PID setting parameters. If the temperature rises directly and over-temperature protection occurs, the controller fails and the control instrument must be replaced.
Temperature and humidity test chamber in the humidity test process, humidity does not meet the specified requirements, where is the problem?
In the humidity-heat test chamber, the actual humidity will reach 100% or the actual humidity and the target humidity will differ greatly. The value is much lower. The former phenomenon may be caused by the dry gauze on the wet-bulb sensor. 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, and whether the water level controller water supply system 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 due to the fact that the humidifying system of the constant temperature and humidity test box is not working, the water supply system of the humidifying system is checked, whether there is a certain amount of water in the water supply system, whether the water level control 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 and ask professional service personnel for overhaul.