MS27650G
(c) Thermal shock per MIL-STD-202, Method 107, test condition B, modified as follows:
Test conditions:
1. The meter shall be operated at 29V, 380 Hz during Step 1.
2. The meter shall be operated at 23V, 420 Hz during Step 3.
MEASUREMENTS DURING CYCLING
1. The meter shall show no evidence of damage and shall not malfunction.
(d) Operation at room ambient temperature (approximately 25° C) and 26 V, 400 Hz for
20 ± 1 hours.
(e) Hermetic seal.
(f) Insulation resistance.
(g) Sea level dielectric stress (600V RMS, 2 to 5 seconds)
(h) All meters failing one or more of these conformance tests shall be rejected.
12. In addition to the above tests, three sample meters total (any part number) shall be subjected to the following tests every two years.
(a) Salt spray. (b) Vibration. (c) Shock.
(d) Life.
(1) High voltage at high temperature (100 Hours) (2) Low voltage at high temperature (100 Hours) (3) High voltage at low temperature (100 Hours) (4) Low voltage at low temperature (100 Hours) (5) 26 Volts at room ambient.
(approximately +25° C) (100 Hours)
500 Hours
At the conclusion of these tests, meter readings shall be within the specified accuracy. Qualification test.
The qualification tests are to be conducted in accordance with MIL-DTL-7793, except that four (4) sample meters (designated 1, 2, 3 and 4) shall be submitted to Group 1 tests per table III of this specification sheet. Samples designated 1 and 2 shall be submitted to Group 2 tests and samples designated 3 and 4 shall be submitted to Group 3 tests.
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