MIL-D-21523A(WEP)
Temperature and Humidity Tests
4.6.1.5
4.6.1.5.1 High Temperature - One diaphragm assembly
shall be subjected to continuous exposure to air tempera-
ture of +110 degrees Fahrenheit, with a relative humidity
of 100 percent, for a period of 24 hours, to meet the
requirements
Of
3.4.5.l.a
Low Temperature - One diaphragm assembly shall
4.6.1.5.2
be subjected to air temperature of -20 degrees Fahrenheit
for a period of 24 hours, to meet the requirements of
3.4.5.2.
Thermal Shock - One diaphragm assembly shall
4.6.1.5.3
be subjected to temperature change from +80 + 3 degrees
to +28 degrees Fahrenheit, within.5 seconds, to meet the
requirement Of 3.4.5.3.
Periodic Tests
4.6.2
Static Pressure Test - One diaphragm assembly
4.6.2.1
selected from each inspection sublet of 20, as specified
in 4.2.3.1, shall be covered with 6 inches of water and
subjected to 30 psig air pressure above the membrane for
15 minutes to meet the requirements of 3.3.3.
Bilateral Flexure Test - Five diaphragm assemb-
4.6.2.2
lies shall be selected from the combined three sublets as
specified in 4.2.3.1. Each of these diaphragm assemblies
mounted in a suitable test fixtures shall be simultaneou~ly
pressurized above and below the membrane with 30 psig air
pressure. The air pressure above the membrane shall be
varied from 25 to 40 psig at the rate of 1 cycle-per-minute
for 50 cycles to meet the requirements of 3.3.4
Rupture Test - Five diaphragm assemblies, after
4.6.2.3
being subjected to the test of 4.6.2.2, shall have the mem-
brane explosively ruptured by the actuation of a single
detonator to meet the requirements of 3.3.5.
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