PMS PROCEDURE (continued) NM2C
6.19A OXYGEN RATIO CONTROLLER
* 6.19A.1 Set the Gas Selector switch to O
2
+N
2
O.
6.19A.2 Depress the O
2
FLUSH for 5 seconds.
6.19A.3 Set the oxygen flow to 1000 ml/min.
6.19A.4 Open the nitrous oxide flow control valve to the stop position.
( ) 6.19A.5 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19A.6 Adjust the oxygen flow to 1.5 l/min.
( ) 6.19A.7 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19A.8 Adjust the oxygen flow to 2 l/min.
( ) 6.19A.9 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19A.10 Adjust the oxygen flow to 4 l/min.
( ) 6.19A.11 What is the oxygen concentration after the value stabilizes? ___ % (21-
29)
6.19A.12 Reduce the O
2
flow to 500 ml/min. Verify that the N
2
O flow is greater
than or equal to 600 ml/min.
6.19A.13 Close the oxygen flow control valve.
( ) 6.19A.14 What is the flow of nitrous oxide? ___ ml/min. (0) or 375-750 ml/min on
machines with later design ORC (P/N 4113329-001)
6.19A.15 What is the oxygen concentration with the O
2
flow control valve
closed?___% (>21)
6.19A.16 Close the nitrous oxide flow control valve.
* These items do not apply to machines with later design (P/N 4113329-001) ORC.
Rev. K
6-42
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