Summary of common problems in experimental constant temperature and humidity Test Chamber

Question 1: Users who use the constant temperature and humidity Test Chamber for the first time may encounter this situation. During the test, the humidity suddenly shows 100%, but I don't know what is causing it?

Step 1: Check whether the wet ball gauze is hung on the humidity sensor. The sensor near the sink is a humidity sensor. Hang gauze over the humidity sensor and wrap the temperature-sensitive part of the sensor. A small number of customers often hang the gauze in the wrong position and hang it on the temperature sensor, causing machine failure. Therefore, please carefully confirm that the upper part is the temperature probe and the lower part is the humidity probe.

Step 2: If the hanging method is correct and the humidity is still 100%, please check whether the wet ball gauze has yellowing phenomenon, or if it has been used for too long, too much minerals have accumulated on the gauze, which will reduce the water absorption performance of the wet ball gauze If you want to replace the wet ball gauze, if you don't change the wet ball gauze, you need to check whether there is water in the wet ball tank or the water level is low, and the gauze cannot absorb water. The following sections:

a. Check whether there is water in the water level tank next to the sink. Otherwise, the float may be damaged.

b. The electromagnetic pump is damaged. Measure its resistance with the voltage range of your multimeter. If it is open, it will be damaged.

c. The intermittent replenishment timer is damaged and cannot replenish water normally.

Step 3: There is still a problem with the settings of the controller. A small number of customers have misunderstood the use of constant temperature and humidity Test Chambers. They usually set the humidity at low temperature and set the humidity at 120 degrees Celsius. Unit is misaligned and unstable. The low-temperature machine cannot control the humidity, and it is easy to freeze; the high-temperature evaporation is too fast, and it is difficult for the machine to set the humidity. Therefore, users are requested to read the instructions carefully to standardize the operation of the machine and prolong the service life of the equipment.

Question 2: What should I do if the constant temperature and humidity Test Chamber is not used for a long time?

If it is necessary to stop the constant temperature and humidity Test Chamber for a period of time due to special circumstances, some protective measures should be taken. The specific methods are as follows:

(1) When the constant temperature and humidity Chamber is out of service, the items in the constant temperature and humidity Chamber should be taken out, the power plug should be unplugged, and the inside and outside of the test box should be cleaned.

(2) Use a strip of paper between the door seal and the box to prevent the door seal from sticking to the box; if you plan to not use it for a long time, you can also apply some talcum powder on the door seal.

(3) The constant temperature and humidity Test Chamber after deactivation also needs to be placed in a dry and ventilated place to avoid direct sunlight. After the position is moved, the Test Chamber shall remain stable.

(4) The indoor air has a certain humidity, so do not cover the Test Chamber with a plastic bag. Moisture is not easy to lose, which will cause corrosion of metal parts and damage the performance of original electrical parts.

(5) In the constant temperature and humidity Test Chamber, the freezing temperature of Freon is very low, so there is no need to worry about it freezing, and the Test Chamber should be placed in a place with a higher temperature.

(6) If conditions permit, it is better to turn on the power once a month, and the compressor will run normally for half an hour to one hour before turning off.

Certain specifications and steps need to be followed in the release and maintenance process:

1 Take the wet ball gauze out of the packaging box and cut about 10cm;

2 Put the lower end of the wet ball gauze into the sink to soak (it is easier to sense the humidity), hang it in the air or put it on the humidity sensor.

Maintenance and inspection of wet ball gauze in constant temperature and humidity Test Chamber: wet ball gauze needs to be hung on the wet ball sensor at the upper end, and placed in the wet ball gauze sink at the lower end, so as to absorb the water in the sink and get damp. If the wet ball gauze is installed in other places, the humidity sensor will not be able to sense the humidity, resulting in the illusion that the humidity is 100%, the humidity cannot drop, or the humidity cannot be controlled at all. When doing the humidity test, it is necessary to check whether the wet ball gauze is hung properly. If it hangs, check to see if the gauze is wet. In case of baking or poor water absorption, please replace the wet ball gauze in time.