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|  MIL-V-85830(AS)
4.8.2,5.2 Battery power on ground. The nominal battery voltage shall be
applied across the ventilator battery terminals. With the motor switch in the
`ON' position, the pressure at the outlet of the delivery hose shall be
recorded at air flows of O, 25, 50, 75, 100, and 125 lpm. and shall be as
specified in 3.9.5.2.
4.8.2.5.3 External power at 10,000 feet. The ventilator shall be placed
in an altitude chamber and the pressure shall be reduced to .7 standard
atmospheres over a period of 15' minutes. The ventilator shall be switched on
with 28 volts d.c. applied to the external connector. The pressure at the
outlet of the air supply hose shall be as specified in 3.9.5.3.
4.8.2.6 Electromagnetic compatability. The ventilator shall be tested in
accordance with MIL-STD-462 and shall meet the requirements as specified in
3.9.6.
4.8.2.7 Delivery hose noise. The noise in the frequency range of 200-5000
Hz. generated at the outlet of the air supply hose under air flow conditions
shall be measured. Characteristics shall be plotted for air flows of
25, 50, 100, and 150 lpm. through the air supply hose with the ventilator "
operating from an external supply of 28 volts d-c. The ventilator shall meet
the requirements specified in 3.9.7.
4.8.2.8 Chemical agent permeation. Rubber seals, o-rings, gaskets, hose,
and hose connectors from the ventilator, shall be tested for chemical agent
Test slabs made of the same formulation, thickness, cure time and
permeation.
cure temperature shall be used in lieu of ventilator materials.
4,8.2 .8.1 Mustard. Resistance to permeation by mustard shall be tested as
specified in MIL-STD-282, Method T-209. The material shall meet the
requirements as specified in 3.9.8.
4.8.2 .8.2 Vx. Resistance to permeation by Vx shall be tested as specified
in MIL-STD-282, Method T-208. The material shall meet the requirements as
specified in 3.9.8.
4.8.2.8.3 Thickened soman. Resistance to permeation by thickened soman
shall be tested as specified in MIL-STD-282, Method T-208. The material shall
meet the requirements as specified in 3.9.8.
4.8.3 Endurance.
4.8.3,1 Electrical. With the ventilator operating from an external supply
of 28 volts d-c., and using a suitable test rig for creating a typical airflow
pattern of the mask, the ventilator motor shall operate for four hours
switched `ON' followed by one hour switched `OFF'. This cycle shall be
repeated 200 times. At the conclusion of the motor endurance test, the
ventilator shall be tested in accordance with 4.8.2.1, 4.8.2.2, 4.8.2.3,
4,8.2.4 and 4.8.2.5 and shall meet the requirements of 3.9.1, 3.9.2, 3.9.3,
3.9.4, and 3.9.5 as specified in 3.9.9.1.
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