Why does the constant temperature and humidity test chamber show abnormal temperature and humidity?

Question

Accepted Answer

The constant temperature and humidity test chamber is a relatively common environmental test chamber, which is used to test the heat resistance, cold resistance, dry resistance and humidity resistance of various materials. It is suitable for testing the quality of electronic, electrical, communication, instrument, vehicle, plastic products, metal, food, chemical, building materials, medical, aerospace and other products.

Why does the constant temperature and humidity test chamber show abnormal temperature and humidity?

HUDA reminds you that there may be the following reasons.

1. The humidity display of the temperature and humidity controller of the constant temperature and humidity chamber is abnormal. At this time, we must first check the over-temperature protector that controls the humidifier to see if it is still at the position of 130 °C to ensure that it is not because the water temperature protection has been set. Low causes humidification abnormality.

2. Secondly, check whether the pipelines in the laboratory have not been cleaned for too long, resulting in poor drainage, and then check whether there is water in the wet cloth sink, whether the water inlet pipeline is unobstructed, and whether there is air in the pipeline.

3. Finally, check whether the solid state relay of the humidity has been broken down, resulting in constant humidification. We can use a clamp-on ammeter to detect whether the humidifier is working normally, whether the power is normal, etc.

4. Turn off the main power supply of the constant temperature and humidity chamber, open the drain valve under the humidification bucket to a position parallel to the pipeline, drain all the water inside, clean the internal dirt, then remove the silicone pipeline and scrub in water , After the maintenance is completed, install it back in the opposite direction according to the way of dismantling. After the installation is completed, it is necessary to close the drain valve under the humidification barrel to a position perpendicular to the pipeline, and then turn on the main power supply behind the machine to conduct a humidity test.

The above are several reasons that may cause the abnormal temperature and humidity display of the constant temperature and humidity test chamber.