NM2C REPLACEMENT PROCEDURES (continued)
4.8.32 Open an oxygen cylinder valve and turn the System Power switch to
ON.
4.8.33 Set the oxygen flow to five liters per minute.
4.8.34 Close the oxygen cylinder valve.
4.8.35 As the pressure drops, the O
2
SUPPLY alarm should activate when
the pressure is between 40 and 34 psi as shown on the test gauge.
4.8.36 If the alarm activates when the pressure is below 34 psi or above
above 40 psi, turn the adjustment wheel (see illustration), repeat the
test and adjust as necessary to bring the set point into the correct
range.
4.8.37 Turn the System Power switch to STANDBY.
4.8.38 Disconnect the test gauge and replace the plug in the regulator line
tee fitting.
4.8.39 Replace the table top and its retaining screws.
4.8.40 Replace the flowmeter housing rear cover and its retaining screws.
4.8.41 Connect the pipeline hoses.
4.8.42 Perform the PMS Procedure given in Section 6.
4-29
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