MIL-DTL-28837C
4.7.5 Thermal shock (see 3.8). Mixers shall be tested in accordance with method 107 of MIL-STD-202. The
following detail shall apply:
Test condition letter: B, unless otherwise specified (see 3.1).
4.7.6 Vibration (see 3.9). Unless otherwise specified (see 3.1), mixers shall be tested as specified in 4.7.6.1.
4.7.6.1 High frequency. Mixers shall be tested in accordance with method 204 of MIL-STD-202. The following
detail shall apply:
Test condition letter: D, unless otherwise specified (see 3.1).
4.7.6.2 Random nature. Mixers shall be tested in accordance with method 214 of MIL-STD-202. The following
detail shall apply:
Test condition: IIF and 15 minutes duration, unless otherwise specified (see 3.1).
4.7.7 Shock (see 3.10). Mixers shall be tested in accordance with method 213 of MIL-STD-202. The following
shall apply:
Test condition letter: A, unless otherwise specified (see 3.1).
4.7.8 Seal (see 3.11). Mixers shall be tested as specified in 4.7.8.1, 4.7.8.2, or 4.7.8.3, as applicable (see 3.1).
4.7.8.1 Hermetic seal. Hermetically sealed mixers shall be tested in accordance with method 112 of MIL-STD-202.
The following details shall apply:
a.
Test condition letter: C, unless otherwise specified.
b.
Procedure: IIIA or IIIC.
c.
Degree of leakage rate sensitivity:
-6
3
10 atm cm /s for mixers whose volume is greater than 2 cubic inches.
(1)
-8
3
10 atm cm /s for mixers whose volume is 2 cubic inches or less.
(2)
4.7.8.2 O-ring seal, solder seal, or encapsulated seal. O-ring sealed, solder sealed, or encapsulated sealed
mixers shall be tested in accordance with method 104 of MIL-STD-202. The following detail shall apply:
Test condition letter: B.
4.7.8.3 Dust-cover seal. When specified (see 3.1), dust cover sealed mixers shall be tested in accordance with
method 103 of MIL-STD-202. The following detail shall apply:
Test condition letter: B.
4.7.9 Barometric pressure (when specified (see 3.1) (see 3.12)). Mixers shall be tested in accordance with method
105 of MIL-STD-202. The following details shall apply:
a.
Method of mounting: Normal mounting means.
b.
Test condition letter: C, unless otherwise specified (see 3.1).
c.
Measurements after test. Electrical characteristics, as applicable (see 3.1).
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