Because the constant temperature and humidity machine is a high-precision instrument, and it is bulky, we are inconvenienced when moving, and the circuit system is complicated. When it fails, we often don't know where to start, in order not to affect the user's test. And I can judge the cause of the fault in time and make a corresponding solution, the following small class opens.
1. The temperature and humidity controller of the constant temperature and humidity machine shows that the temperature is abnormal. At this time, we must first check the ultra-humidity protector of the control room to see if it is still at 150 °C.
2. Secondly, check whether the pipeline in the laboratory has not been cleaned for too long, so that the water flow is not smooth. Check whether there is water in the water tank. If there is no water, check whether the water tank has water.
3. Finally, check whether the solid state relay of the humidity is short-circuited. If there is no problem with the heater, then we can use the meter's AC voltage file for detection.
In addition, the total power supply of the constant temperature and humidity machine can be turned off, and the drain valve under the heating barrel is opened to a position parallel to the pipeline, the water inside is discharged, the internal dirt is cleaned, and then the silicone tube is removed. Wash in the water, after the maintenance is completed, according to the way of dismantling, put it back in the opposite direction. After the device is finished, close the drain valve under the humidifying bucket to the position perpendicular to the pipeline, and then turn on the main power supply behind the machine.
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