The experimental procedures of the high and low temperature impact test chamber are initially determined as: pretreatment, initial detection, test, recovery, and final detection. Below we will take a look at the operation of each step:
Pretreatment: Place the test sample under normal test atmospheric conditions until it reaches temperature stability.
Initial testing: The requirements of 3.5.2 in GJB150.1-89 will be carried out.
The high and low temperature impact test box test is:
1. The test sample should be placed in the test box according to the requirements of 3.5.3 in GJB150.1-86, and the temperature in the test box (chamber) should be raised to 70 â„ƒ, maintained for 1h or until the test sample reaches temperature stability, with time Both are subject to change.
2. After the high temperature period is over, switch the test sample to a low temperature test chamber (chamber) that has been adjusted to -55 Â° C within 5 minutes, hold it for 1 hour or until the test sample reaches temperature stability, whichever is longer.
3. After the low temperature stage is over, switch the test sample to a high temperature test chamber (chamber) that has been adjusted to 70 Â° C within 5 minutes and keep it for 1 hour or until the test sample reaches temperature stability, whichever is longer.
4. Repeat the above experimental method to complete three cycles. (Note: For large or heavy test samples, the conversion time from one test box to another test box can be based on the minimum time actually required by the relevant standards or technical documents).
After the test, the tested sample is restored: after the test sample is taken out of the test box, it should be restored under normal test atmospheric conditions until the test sample reaches temperature stability.
The final step of the high and low temperature impact test box is the detection: according to the requirements of 3.5.7 in GJB150.1-86.
This is the experimental procedure stipulated in the standard. The operation of the equipment uses Shanghai Linpin. There will be a professional commissioning engineer to install and explain. Free training for 1 to 15 operators to operate independently. The training content includes: operation guidance, simple troubleshooting and maintenance.
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