Brand standard high-low temperature alternating humidity test box operation five

Application Description: Used to assess and determine the suitability of electrical and electronic products or materials for storage and use under conditions of temperature cycling and condensation on the surface of the product in a hot and humid environment.

The equipment should be put into use. Before the test, you should read the operating instructions in detail to standardize the operation. The correct operation we set as five steps: pretreatment, initial detection, test, recovery, final detection, detailed process content:

1. Pretreatment: Place the test sample under normal test atmospheric conditions until the temperature is stable.

2 Initial inspection: Compare the sample to be tested with the standard requirements, and put it directly into the box after meeting the requirements.

3, test:

(1) The test sample shall be placed in the test box according to the standard requirements, and the temperature in the test box (chamber) shall be raised to a specified point and maintained for a certain time until the test sample reaches a stable temperature, whichever is longer.

(2) After the high temperature period is over, the test sample shall be switched to a low temperature test chamber (chamber) that has been adjusted to -55°C within 5 minutes, and held for 1 hour or until the test sample reaches a stable temperature, whichever is longer.

(3) After the low-temperature period is over, the test sample shall be switched to a high-temperature test chamber (chamber) that has been adjusted to 70°C within 5 minutes, and held for 1 hour or until the test sample reaches a stable temperature, whichever is longer.

(4) Repeat the above experimental method to complete three cycles. Depending on the sample size and the size of the space, the time may be slightly wrong.

4. Recovery: After the test sample is taken out of the test chamber, it shall be restored under normal test atmospheric conditions until the test sample reaches a stable temperature.

5, the final test: the degree of damage in the control standard and other methods to assess the test results.

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