Dräger Narkomed 2B - Helium O.F.P.D. - if Applicable; Oxygen Supply Pressure Alarm

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
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