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|  MIL-R-25410G
4.8.11 Lighting circuit. A lamp in accordance with MS25237-327 shall
be installed in the regulator. The regulator shall be connected to the
appropriate power source and visually examined to determine its color and if
the lamp is illuminated. A lamp in accordance with MS25237-328 shall be
installed in the regulator. The regulator shall be connected to the
appropriate power source and visually examined to determine its color and if
the lamp is illuminated. In both cases, the regulator shall pass the
requirements specified in 3.6.10.
4.8.12 Emergency and test pressures. The regulator shall be
connected to a source of pressure to provide the inlet pressure to the
regulator as indicated in 4.7.5, and the oxygen supply valve shall be placed
in the "on" position. With the diluter lever in the "Normal Oxygen" position,
a flow of 10 lpm shall be drawn from the outlet of the regulator. The
pressure control lever shall then be placed in the "Emergency" position, at
which time the outlet pressure of the regulator shall increase to 3.5, plus
or minus 0.5 inches of water. The outlet flow from the regulator shall then
be increased to 80 lpm, and the diluter lever shall be placed in the "100%
Oxygen" position. Under these conditions, the outlet pressure of the
regulator shall be not less than 2.0 inches of water. The outlet flow from the
regulator shall then be reduced to zero, at which time the outlet pressure of
the regulator shall not exceed 5.5 inches of water when in the "Emergency"
position. The outlet flow from the regulator shall be adjusted to 10 lpm with
the pressure control lever placed in the "Normal" position, and the diluter
lever in the "Normal Oxygen" position. The pressure control lever shall then
be placed in the "Test Msk" position. Under these conditions, the regulator
outlet pressure shall be 11, plus or minus 5 inches of water. The outlet flow
from the regulator shall then be reduced to zero, at which time the outlet
pressure of the regulator shall not exceed 17.5 inches of water, when in the
Test Mask" position. The regulator shall pass the requirements specified in
3.6,11.
4.8.13 Flow indicator. The regulator shall be connected to a source
of Pressure to provide the inlet pressure to the regulator as indicated in
4.7.5. The oxygen supply valve shall then be placed in the "on" position
and the regulator placed in an altitude chamber. The regulator shall be
checked under the followlng conditions and shall pass the requirements
specified in 3.6.12.
a. At ground level, with diluter lever in "100% Oxygen" position,
and an ambient flow of 8 lpm.
b. At ground level, with diluter lever in "Normal Oxygen" position,
and an ambient flow of 15 lpm.
c. At an altitude sufficient to give 17 inches of outlet water
pressure, with the diluter lever in the "100% Oxygen" position, and an
ambient flow of 12 lpm. Upon completion of these test procedures, the
oxygen supply valve shall be placed in the "off" position and the diluter
lever placed in the "Normal Oxygen" position. The regulator shall pass the
requirements specified in 3.6.12.
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