Method 1: This test involves a cyclic process within a high-low temperature and damp heat chamber. First, the unpackaged sample is placed in the chamber at an initial temperature of 30°C. Over a period of 2 hours, the temperature is gradually increased to 60°C, while the relative humidity is raised to 95% and maintained for 6 hours. Next, the temperature is slowly decreased back to 30°C over 8 hours, with humidity kept above 85%. Once the temperature reaches 30°C, the humidity is increased to 95% again and held for another 8 hours. This entire cycle is repeated a total of 5 or 10 times to ensure thorough evaluation of the device's resilience.

After completing the cycles, the sample is removed from the chamber. The specified tests outlined in the product’s detailed specifications must be conducted within 5 minutes of removal and after a 2-hour recovery period. All results must meet the requirements stated in the product specification.

Method 2: In this approach, the unpackaged test sample is first placed into the chamber at room temperature. The temperature is then increased at a rate of less than 10°C per minute to reach 40°C, and the humidity is adjusted to 95%. The sample remains at this stable condition for 96 hours to simulate long-term exposure to humid and warm environments.

Once the test is complete, the sample is taken out, and the required tests are performed within 5 minutes of removal and after a 2-hour recovery period. All test outcomes must conform to the standards set by the product’s detailed specifications.

These hygrothermal test methods are defined in the SJ 20128-1992 standard titled "Environmental Test Method for Communication Electroacoustic Devices." This standard provides a reliable framework for assessing the durability and reliability of electroacoustic components under challenging environmental conditions.

Pdo Thread

Plla Thread,Eye Thread,Fishbone Thread,3D 4D Cog Thread,Nose Thread

WEIYE TECHNOLOGY CO.,LTD , https://www.radiassero.com