Constant temperature work of GJB high temperature test chamber test procedure
According to GJB150.3A-2009, "High Temperature Test for Environmental Test Methods in Military Equipment Laboratory," there are detailed procedures for conducting a constant temperature operation test using a high-temperature test chamber. The following steps outline the standard process:
1. Place the test item in the chamber according to its operational configuration. Ensure that it is positioned properly and secured if necessary.
2. Adjust the air temperature inside the high-temperature test chamber to the required constant temperature. If humidity control is specified, it should also be set accordingly.
3. Maintain the environmental conditions within the chamber for at least two hours after the test item's temperature stabilizes. If internal components cannot be directly monitored, additional time may be needed based on thermal analysis to ensure the entire unit reaches a stable state.
4. Conduct a visual inspection of the test item as thoroughly as possible. Document all observations and compare them with pre-test data to identify any changes or anomalies.
5. Operate the test item under the specified conditions and allow it to reach a stable temperature. Perform performance tests according to the technical specifications, and record the results for comparison with the initial data.
6. Stop the operation of the test item and gradually return the chamber’s air temperature to standard atmospheric conditions. Keep the chamber at this condition until the test item cools down to a stable temperature.
7. Finally, perform a full visual inspection and functional test of the test item based on the technical documentation. Record all findings and compare them with the data collected before the test to evaluate any impact caused by the high-temperature exposure.
This procedure ensures that military equipment is tested under controlled and realistic high-temperature environments, helping to assess its reliability and performance under extreme conditions. Following these steps carefully is essential to obtain accurate and repeatable test results.
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