GJB150.3A-2009 "High Temperature Test for Environmental Test Methods in Military Equipment Laboratory" has detailed requirements for the test procedure for constant temperature operation of high temperature test chamber. The test procedures are as follows:
1. Install the test piece according to the working technology state.
2. Adjust the air temperature in the high temperature test chamber to the required constant temperature (and humidity when applicable).
3. Continue to maintain the conditions in the high temperature test chamber for at least 2 hours after the temperature of the test piece has stabilized. If the temperature of the internal element cannot be measured, additional hot dip time should be determined based on thermal analysis to ensure that the temperature of the entire test piece is stable.
4. Visually inspect the test piece as much as possible, record the test result, and compare it with the data before the test.
5. Make the test piece work and stabilize its temperature. The test piece was tested for performance according to the requirements of the technical documents, and the test results were recorded and compared with the data before the test.
6. Stop the test piece, adjust the air temperature in the high temperature test chamber to the standard atmospheric conditions, and maintain the condition until the test piece temperature reaches a stable level.
7. Perform a comprehensive visual inspection and performance test on the test piece according to the requirements of the technical documents, record the inspection and test results, and compare with the pre-test data.
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