Digital communication equipment alternating damp and heat test

In electronic communications, the high and low temperature and humidity alternating test is used to test the degree of hazards and stability in electronic communications. Its role is particularly significant in test layer testing. It is suitable for determining the adaptability of components, equipment or other products to use, transportation and storage under conditions where high humidity and temperature cycle changes are combined and condensation is usually generated on the surface of the test sample.
The alternating hot and humid test of digital communication equipment can determine the adaptability of digital communication equipment under hot and humid environmental conditions.
Zhongke Testing Reliability Experiment Center has the reliability performance of various digital communication equipment and provides professional alternating heat and humidity test services for digital communication equipment.

1. Divided according to business type: telegraph, telephone, video conference, fax, data communication, etc.
2. According to the transmission medium, it is divided into: wireless communication and wired communication
3. According to signal type, it is divided into: analog communication and digital communication
4. According to the signal multiplexing method, it is divided into: frequency division multiplexing, time division multiplexing and code division multiplexing
5. According to whether the communicator is moving, it is divided into: fixed communication and mobile communication

This test takes 24 hours as a cycle, and each cycle is divided into four stages: warming, high temperature and high humidity, cooling and low temperature and high humidity.
1. Heating stage
Within 2 hours, raise the temperature in the test chamber (room) from low temperature (20/30℃) to high temperature (40/60℃), and the relative humidity to 95%. The temperature and humidity should be controlled to ensure that there is no condensation on the surface of the test sample.
2. High temperature and high humidity stage
Keep for 6 hours at 40/60℃ and relative humidity 95%.
3. Cooling stage
Reduce the temperature in the test chamber (room) to 20/30°C within 8 hours, and the relative humidity during this period should be maintained above 85%.
4. Low temperature and high humidity stage: When the temperature of the test chamber (room) reaches 20/30°C, the relative humidity should be 95% and maintained under this condition for 8 hours.

GB/T 13543-1992 Environmental test method for digital communication equipment