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|  MIL-R-2541OG
4.8.14 Overload. With the oxygen supply valve in the "off" position
the diluter lever in the "100% Oxygen" position and the relief valve capped,
a pressure of 27 inches of water shall be applied to the outlet of the
regulator for a period of 2 minutes. The regulator shall pass the
requirements specified in 3.6.13. The regulator shall then be subjected
to and pass the flow characteristics, oxygen-ratio and pressure breathing
characteristics tests.
4.8.15 Low temperature operation. The regulator shall be connected
to a source of pressure to provide an inlet pressure to the regulator as
indicated in 4.7.5, and shall be placed in a cold chamber maintained at a
temperature of minus 65 5F, for a period of 3 hours. At the end
of this time, and while the regulator is maintained at this temperature,
the regulator shall be subjected to cyclic operation for a minimum period
of 2 minutes. A cyclic operation shall consist of alternate outlet flows
from the regulator, of 0 and 70 lpm at a rate of 10 cycles per minute.
The regulator shall pass the requirements specified in 3.6.14. While at
this temperature, the regulator shall then be subjected to and pass the
flow characteristics, oxygen-ratio, and pressure-breathing characteristics
tests.
4.8.16 High temperature operation. The regulator shall be connected
to a source of pressure to provide an inlet pressure to the regulator as
indicated in 4.7.5, and shall be placed in an oven maintained at a
temperature of plus 160 5F, for 3 hours. At the end of this time
and while the regulator iS maintained at this temperature, the regulator
shall be subjected to cyclic operation for a minimum period of 2 minutes.
This cyclic operation shall consist of alternate outlet flows, from the
regulator, of O and 70 lpm at a rate of 10 cycles per minute. The regulator
shall pass the requirements specified in 3.6.15. While at this temperature,
the regulator shall then be subjected to and pass the flow characterktics,
oxygen-ratio, and pressure-breathing characteristics test.
4.8.17 Supply valve cycling. The regulator shall be connected to a
source of pressure to provide the maximum inlet pressure to the regulator
as indicated in 4.7.5, and the oxygen supply valve shall be cycled back and
forth between the "on" and "off" positions for at least 1000 cycles, at the
rate of 10 cycles per minute. A cycle shall constst of one full operation
from "off" to "on" and back to "off". Each time the supply valve is cycled
to the "off" position, the diluter assembly shall automatically move to the
100% position. The regulator shall pass the requirements specified in
3.6.16. The regulator shall then be subjected to and pass the supply valve
leakage, emergency and test pressures, and toggle operating forces tests.
The regulator shall be connected
4.8.18 Toggle operating forces.
to a pressure source to provide the inlet pressure to the regulator as
indicated in 4.7.5, and the forces required to actuate the oxygen supply
valve, the diluter lever, and the pressure control lever shall be measured
at a point not more than 1/8 inch from the tip of each toggle, in the
direction of intended movement, and parallel to the panel of the regulator.
The regulator shall pass the requirements specified in 3.6.17.
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