Hygrothermal test method for environmental test methods for communication electroacoustic devices:
1. The unpackaged test sample was placed in a high-low temperature damp heat test chamber at a temperature of 30 ° C. The temperature of the box was raised to 60 ° C in 2 h, the relative humidity was raised to 95%, and maintained under this condition for 6 h.
2. The temperature of the box is lowered to 30 ° C within 8 h, during which the relative humidity is maintained above 85%.
3. When the temperature of the box reaches 30 °C, the relative humidity rises to 95%, and is maintained for 8 hours under this condition.
4. Repeat the above three tests for a total of 5 or 10 cycles.
5. Remove the test sample in a high and low temperature damp heat test chamber. The test items specified in the detailed product specification shall be completed within 5 min after the test sample is taken out and after 2 h of recovery, and the results shall comply with the requirements of the detailed product specifications.
Hygrothermal test method for environmental test methods for communication electroacoustic devices:
1. Put the unpackaged test sample into the high and low temperature damp heat test chamber with room temperature, increase the box temperature to 40 °C at an average rate of less than 10 °C/min, and adjust the humidity inside the box to 95%. The sample was kept at a temperature stable for 96 h.
2. Take out the test sample and complete the test of the items specified in the detailed product specification within 5 minutes after the removal and after 2 hours of recovery, and the results should meet the requirements of the detailed product specifications.
The above damp heat test method is specified in the SJ 20128-1992 [Communication Electroacoustic Device Environmental Test Method] standard.
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