The inside of the thermal shock box is divided into two areas, a part of high temperature, a part of low temperature, and generally high and low temperature conversion within 15 seconds.

At the same time, this is not controlled by humidity. The constant temperature and humidity box index is mainly temperature and humidity. The temperature change rate of different boxes is different. The temperature change in this test is for a while.

The test limit of the box can be judged by the temperature and humidity graph of the box.