In the natural environment, temperature and humidity are inseparable from the two natural factors, different regions due to different geographical locations, the resulting temperature and humidity effects are also different. For example, winter in northern China is a low temperature and low humidity environment, while the summer in the south is high temperature and humidity environment. This test is used to confirm the product in the temperature and humidity climate and environmental conditions, storage, transportation, use of adaptability. The severity of the test depends on the high / low temperature, humidity and exposure duration.

Reference standard: GB / T 2423.3, IEC 60068-2-78, GB / T 2423.4, IEC 60068-2-30, EIA 364, MIL-STD-810F and so on.