Downloaded from https://www.everyspec.com MIL-STD-81OC Step 10 - Repeat steps 2 through 9 three more times. Step 11 - Return to standard ambient conditions. Step 12 - Reduce the chamber temperature to -54° C (-65”F) within 2 hours. Step 13 - the chamber pressure at a rate of 1,000 to 1,500 ft/min to 50,000 feet altitude while maintaining the specified -54° C Reduce (-65”F) temperature. The time from the start to the completion of step 13 shall be 2-1/2 hours. ,, Step 14 - Within 30 minutes, return the chamber to standard ambient conditions.
(Do not add humidity.) Step 15 - After stabilizationof the test item, operate and inspect the item and obtain results in accordance with General Requirements, 3.2. During.this period, special attention shall be given to electrical and electronic test items for operation or malfunc- tion resulting from arcing or corona effects. The following details shall ,beas specified in the equipment 4. SUMMARY. spec-n: a. Pretest data required (see General Requirements, 3.2). b. Failure criteria. MSTHOD 518.1 518.1-2