
PMC PROCEDURE (continued)
NM2B
6.14.6
Helium O.F.P.D. - if applicable
6.14.6.1
Set the gas selector switch to ALL GASES.
6.14.6.2
Open the helium cylinder valve.
6.14.6.3
Open one (1) oxygen cylinder valve.
6.14.6.4
Set the helium flow to 4 l/min; set the oxygen flow to 4 l/min.
6.14.6.5
Close the oxygen cylinder valve.
( )
6.14.6.6
Does the flow of helium cease when the oxygen pressure is
depleted? ___ (Y)
6.14.6.7
Close the helium flow control valve.
6.14.6.8
Set the gas selector switch to O
2
+ N
2
O.
6.14.6.9
Close the oxygen flow control valve.
6.14.7
Oxygen Supply Pressure Alarm
6.14.7.1
If not already connected, connect a dedicated O
2
test gauge to the
TEE fitting in the O
2
regulator output line.
6.14.7.2
Open and close an oxygen cylinder.
6.14.7.3
Set the oxygen flow to 2 l/min.
( )
6.14.7.4
What is the pressure on the dedicated O
2
test gauge when the "O2
SUPPLY PRESSURE" LED turns on? ___ PSI (34 - 40)
6.14.7.5
Does the O2 SUPPLY LOW message appear in the Caution
display? ___ (Y)
6.14.7.6
Bleed the remaining O
2
pressure from the system, then close the
flow control valve.
6.14.7.7
Remove the test gauge from the TEE fitting in the O
2
regulator
output line and replace the plug.
Rev. Y
6-34
Summary of Contents for Narkomed 2B
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