ADJUSTMENT AND CALIBRATION PROCEDURES (continued) NM2C
5.3.18A The nitrous oxide flow should stop when the flow of oxygen is
between 250 and 400 ml per minute.
5.3.19A Un-pinch the N
2
O bypass line on the ORC.
5.3.20A Close the O
2
flow control valve, and fully open the N
2
O flow control
valve. Verify that the O
2
concentration is 22 - 31%.
5.3.21A Close the N
2
O flow control valve and turn the System Power switch
to STANDBY.
5.3.22A Reconnect the pipeline hoses.
5.3.23A Replace the flowmeter housing rear cover.
5.3.24A Perform the PMS Procedure given in Section 6.
ADJUSTING
SCREW
SV49042
LOCKNUT
LOW FLOW
ORC ASSEMBLY
N2O BYPASS
LINE
Figure 5-3A: LOW FLOW OXYGEN RATIO CONTROLLER
5-10B Rev. D
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