MIL-F-18327F
4.7.18 Acceleration (when specified, see 3.1) (see 3.21). Filters shall be tested in accordance with method 212,
MIL-STD-202. The following detailed requirements shall be as specified (see 3.1).
a.
Special mounting, if applicable.
b.
Electrical loading, if applicable.
c.
Test condition letter (see 3.1):
If test condition A is specified, the value of "g" (see 3.1).
(1)
(2)
If test condition B is specified, the directions of application of acceleration and value of "g" (see 3.1).
If test condition C is specified, the value of acceleration (see 3.1).
(3)
d.
Measurements during and after test shall be as specified (see 3.1).
4.7.19 Flammability (external flame) (grades 5, 7, and 9 only) (see 3.22). Filters whose displaced volume is
greater than 0.3 cubic inch, shall be tested in accordance with method 111, MIL-STD-202. The following details shall
apply:
a.
Point of impingement of applied flame: One of the lower free corners of the filter, so that the flame is just in
contact with the filter. The free corners of the filter are those corners which are the greatest distance from
the mounting studs or brackets.
b.
Allowable time for burning of visible flame on specimen: 3 minutes.
c.
Measurements during and after test: Filters shall be observed for explosion, violent burning which results in
an explosive type flame, or dripping of flaming material.
4.7.20 Resistance to solvents (see 3.23). Filters shall be tested in accordance with method 215, MIL-STD-202.
The following details shall apply:
a.
The marked portion of the filter shall be brushed.
b.
Filters shall be examined for mechanical damage.
4.7.21 Fungus (see 3.24). Unless certification is provided, filters shall be tested in accordance with method 508 of
MIL-STD-810. Filters shall be examined for evidence of fungus.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of material is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. The filters covered by this general specification are intended for use as passive frequency-
selective networks such as low pass, high pass, band pass, band suppression, dual functioning (or any combination
thereof) in military systems operating under separate or a combination of demanding environments.
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