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MIL-R-9345 (USAF)
-10-
4.3.3.3 Contaminated air:
4.3.3.3.1 Dust and oil contamination. - The regulator shall be mounted in
test setup No. 2 and subjected to contamination by dust for a period of 24 hours
and by oil for 1 hour in every 6 hours of the 24-hour dust contamination period.
Cabin pressure shall be maintained at a level which will permit flaw of air at
a value equivalent to rated regulator capacity.
4.3.3.3.2 Smoke contamination. - The regulator shall be mounted in test
setup No. 2 and shall be subjected to contamination by smoke for 6 hours at
1 ambient altitude in each range of regulator operation while controlling
cabin pressure. The flow of air shall be sufficient to burn tabacco at the
specified rate.
4.3.3.3.3 Operation. - After contamination, the regulator shall be mounted
in test setup No. 1 and shall be subjected to the sampling tests. Limit
tolerances shall be increased 100 percent over limits specified herein for
the applicable ranges.
4.3.3.3.4 Inspection. - After operation, the regulator shall be disassembled
to determine the extent of contamination.
4.3.3.4 Environmental. - The regulator shall be subjected to the following
tests conducted in accordance with the specified procedures of Specification
MIL-E-5272. After exposure, the regulator shall be inspected and no harmful
or unduo corrosion shall result.
4.3.3.4.1 Salt spray. - The duration of the test period shall be 50 hours.
The regulator shall than be subjected to the sampling tests. Limit tolerances
shall be increased 100 percent over limits specified herein for the applicable
ranges.
4.3.3.4.2 Humidity. - Procedure I.
4.3.3.4.3 Fungus resistance. - Procedure I. After being exposed to these
conditions, the regulator shall be examined for harmful fungus growth, which
if present, shall constitute failure under this test.
4.3.3.4.4 Explosion-proof. - Procedure I. This test shall be conducted
on regulators with electrical mechanisms. The electrical maechanism shall not
cause an explosion of the combustible mixture; or if an explosion does occur,
it shall not cause any explosion or fire outside of the equipment.
4.3.3.5 Electric motors. - When direct current electric motors are
incorporated in the combat changeover mechanism, the motors shall be subjected
to and shall meet the requirements of Specification MIL-M-8609.
4.4 Inspection tests:
4.4.1 Individual tests. - Each regulator shall be subjected to the
following tests:
4.4.1.1 Examination of product. - Each regulator shall be inspected to
determine compliance with this specification with respect to material,
workmanship, design, and construction.

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