Dräger Narkomed 2B, Service Manual, Page: 223 / 308

NM2B PMC PROCEDURE (continued)
6.19B OXYGEN RATIO MONITOR CONTROLLER
6.19B.1 Depress the O
2
FLUSH for 15 seconds.
6.19B.2 Turn the N
2
O flow control valve counter-clockwise to its stop position.
6.19B.3 Slowly increase the oxygen flow until nitrous oxide begins to flow.
6.19B.4 What is the oxygen flow rate? ___(200-400 ml/min.)
( ) 6.19B.5 Slowly increase the oxygen flow until the "O
2
/N
2
O FLOW RATIO" LED
on the alarm panel is lighted.
6.19B.6 What is the nitrous oxide flow rate? ___(150-300 ml/min.)
6.19B.7 Set the oxygen flow to 1000 ml/min.
6.19B.8 Adjust the nitrous oxide flow until the ORMc controls the nitrous oxide.
( ) 6.19B.9 What is the oxygen concentration after the value stabilizes? ___% (21-
29)
6.19B.10 Does the "O
2
/N
2
O FLOW RATIO" LED turn "ON" on the ALARM
PANEL? ___ (Y)
6.19B.11 Does the "O
2
/N
2
O LOW" message appear in the ADVISORY column? ___
(Y)
6.19B.12 Open the nitrous oxide flow control valve to the stop position.
6.19B.13 Adjust the oxygen flow to 1.5 l/min.
( ) 6.19B.14 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19B.15 Adjust the oxygen flow to 2 l/min.
( ) 6.19B.16 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19B.17 Adjust the oxygen flow to 4 l/min.
( ) 6.19B.18 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
* 6.19B.19 Set the Gas Selector switch to ALL GASES.
* Does not apply to 2-gas machines.
Rev. Y
6-45
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