Figure 1-2. Control Panel Assembly

TO 33D2-10-10-41

TM 55-6695-217-13

Hose assembly (13) connects the MS22001 mask,

a. Case Assembly. The case assembly consists of

an aluminum cover and base joined by two hinges and

similar oxygen masks and the P-series helmet to the

tester.

two latches. Split hinges permit the cover to be

completely separated from, the base if desired. The

c. Communication Equipment. A power supply

case assembly also includes four rubber feet and a

carrying handle. The latches provide sufficient seal

changes 115 volt 60 Hz alternating current into 28 volt

pressure to result in a weather resistant. rain proof

direct current. The power supply consists of an ON-OFF

case. The case assembly is finished in a weather

toggle switch (8). a 1 amp cartridge type replaceable

resistant black epoxy paint. Testers can be stacked

fuse (6). a power indicator light (7) that illuminates

during storage.

when there is power in the test set. a power cable

assembly (1). power transformer assembly . and filters

b. Oxygen Supply and Control Equipment. A tee

for the direct current to prevent noticeable alternating

current ripple from being heard in the communication

fitting (9) provides two inlet connections between the

equipment. An audio frequency amplifier amplifies

oxygen supply cylinder and the tester. Oxygen inlets

microphone signals for the "talk out" check of the

are protected by caps. Oxygen pressure gauge (11)

headset and microphone. Suitable connecting cables

measures oxygen cylinder pressure from0 to 500 psi.

allow Headset-Microphone H-78/ AIC, Headset HS-33-

Visual indication of oxygen flow is provided by a blinker

A, Microphone M-15/UR or similar communication

type oxygen flow regulator (10). A type A-14 diluter

equipment to be connected to the tester. EEU-2P Flash

demand, pressure breathing type of oxygen regulator

Protection Goggles are provided regulated 28 vdc

(12) regulates the flow of oxygen and mixes oxygen with

electrical power through suitable connection cables.

ambient air to a specified ratio. The operating pressure

range of the oxygen regulator is from 50 to 500 psi.

LEGEND

POWER CABLE

TEE INLET FITTING

MICROPHONE INDICATOR LIGHT

10.

OXYGEN FLOW INDICATOR

CABLE ASSY, U92A/U

11.

OXYGEN PRESSURE GAUGE

CABLE ASSY, U61/U

12.

OXYGEN REGULATOR

CONNECTOR, JJ-033

13.

HOSE ASSY

FUSE

14.

CABLE ASSY, S-830

POWER INDICATOR LIGHT - RED

ON-OFF SWITCH

Figure 1-2. Control Panel Assembly

1-2