After the test of the high and low temperature test chamber, a series of follow-up work should be carried out. The first is the recovery procedure. The recovery test uses standard atmospheric conditions (5.3 in GB / T 2421-1999) or controlled recovery conditions (GB / T 2421-1999 The recovery treatment is carried out under 5.4.1) of the test. If the recovery treatment is required under controlled recovery conditions, the test sample can be transferred to another test box or carried out in the original high and low temperature test box. If two test box methods are used The transfer time of the test sample should be as short as possible. If a single test box is used, the conditions in the test box should be adjusted to 73% -77% within 0.5H, and then adjusted to 0.5H The temperature of the test box has an error of plus or minus 1 degree. For large test samples, the relevant specifications may allow a longer adjustment time. The recovery time is calculated from the time when the specified recovery conditions are reached, generally 1-2H.
The recovery time of the test sample with a large thermal time constant should be sufficient to allow it to reach temperature stability. If the standard conditions provided above are not suitable for the test sample, the relevant specifications can separately specify the recovery conditions. Visual inspection and electrical and mechanical performance testing.
The relevant specifications of the high and low temperature test chamber should be given:
1. Necessary special installation structure
2. Severity of test: temperature, relative humidity, test time
3. Initial detection
4. Conditional test
5. Intermediate detection
6. Recovery conditions
7. Final inspection
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