MIL-PRF-83860D
4.4.2 Temperature. Unless otherwise specified, the tests shall be conducted at room
ambient temperature.
4.4.3 Immersion. After performing the initial bubble point test and prior to performing
the qualification tests (see table II), filter elements shall be immersed in 275°F test fluid for 72
hours and then in -65°F test fluid for another 72 hours. All internal parts shall be in contact with
the test fluid during this period. After immersion, the filter elements shall remain in the test fluid
at room temperature until further tests are conducted.
4.4.4 Test air. The air used to pressurize a test setup shall be filtered through a
membrane filter (0.45 micron absolute) (see 6.4).
4.4.5 Elimination of static electricity. A device to eliminate static electricity shall be in
proximity to the filter membrane, or to the pan on which it rests, whenever any object or material
is being weighed to a precision of ±0.1 gram or finer.
4.4.6 Flow cycle. A flow cycle consists of increasing the differential pressure across the
filter element from 0 to the operating pressure in table I and then decreasing to 0 psi.
4.4.7 Fatigue cycle. A fatigue cycle consists of increasing the differential pressure
across the filter element (loaded with AC dust) from 0 to the element pressure drop in the flow
fatigue part of the table I and decreasing to 0 psi.
4.5 Requirements cross-reference matrix. Table III provides a cross-reference matrix of
the section 3 requirements tested or verified in the paragraphs below.
TABLE III. Requirements cross-reference matrix.
Requirement
Verification
Requirement
Verification
3.1
4.2
3.6.2
4.6
3.3
4.6.1
3.6.3
4.6.8.3
3.4.1
4.6.9
3.6.4
4.6.2
3.4.2
4.6.1
3.6.5
4.6.4
3.5.1
4.6.1
3.6.6
4.6.3
3.5.2
4.6.1
3.7
4.6.1
3.6.1
4.6.10
3.8
4.6.1
4.6 Tests.
4.6.1 Examination. The filter element shall be examined for compliance with
requirements for materials, dimensions, markings, and workmanship.
4.6.2 Bubble point.
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