Downloaded from https://www.everyspec.com MIL-STD-81OC Step 8 - adjust the chamber test step 8 of table S04.1-11 the fourth operating time period. After th~ test item temperature”has st~bi- lized, the test item shall be operated at the highest specified input voltage (see note (d)) for four time periods each of the duration specified in step 8 of table 504.1-11. The first three time periods of operation With the test item de-energized, conditions to those specified in and maintain until completion of shall be followed by a 15-minute period with the test item de-energized. The test item shal1 be checked for satisfactoryoperation during each operating time period and the results recorded.
Thermal sensor readings of the test item temperature shall be recorded every 10 minutes of test item operation. Step 9 - With the test item de-energized, adjust the chamber test conditions to those specified in step,,.9 of table S04.1-II and maintain until completion of the fourth operating time period. After the test item temperature has stabilized, the test item shall be operated at the highest specified input voltage (see note (d)) for four time periods each of the duration specified in step 9 of table 504.l-II. The first three periods of operation shall be followed by a 15-minute period with the test item de-energized.
The test item shall be checked for satisfactory operation during each operating time period and the results recorded. Thermal sensor readings of the test item temperature shal1 be record- ed at the beginning and end of each operating time period. ,., With the test item de-energized, adjust the chamber temperature to,that specified in step 10 of table 504.l-II. The test item temperature shall be stabilized. The test Step 10 - item shall be operated at the highest specified input voltage (see note (d)) and the chamber pressure adjusted to simulate the altitude specified in step 10 of table 504.l-II. Maintain these test conditions for the length of time specified in step 10 of table 504.1-11.
Thermal sensor readings of the test item temperature shall be recorded every 30 minutes. At the end of the time period specified in step 10 of table 504.l-II, and while “maintaining the test conditions, the test item shall be checked for satisfactory operation and the results recorded. 504.1-5 METHOO 504.1