
NM2B
ADJUSTMENT AND CALIBRATION PROCEDURES (continued)
5.4
Oxygen Ratio Monitor/Controller (ORMC) Adjustment
5.4.1
Remove the rear cover of the vapor box.
5.4.2
Connect a calibrated oxygen monitor to the Freshgas Outlet.
5.4.3
Disconnect the pipeline hoses.
5.4.4
Open the oxygen and nitrous oxide cylinder valves.
5.4.5
Set the System Power switch to
ON
.
5.4.6
Close the O
2
flow control valve.
5.4.7
Open the N
2
O flow control valve to its counter-clockwise stop.
5.4.8
If there is no nitrous oxide flow, proceed to Step 5.4.10.
5.4.9
If there is nitrous oxide flow, loosen setscrew E and move the cam
mounting bracket to the right until the nitrous oxide flow stops.
Tighten setscrew E.
5.4.10
Slowly open the O
2
flow control valve.
5.4.11
If the nitrous oxide starts to flow when the oxygen flow is between
200 and 300 ml per minute, proceed to Step 5.4.14.
5.4.12
If the nitrous oxide does not start to flow when the oxygen flow is
between 200 and 300 ml per minute, loosen setscrew E and move the
cam mounting bracket to the left until nitrous oxide flow starts.
Tighten setscrew E.
5.4.13
Repeat steps 5.4.6 thru 5.4.12 until no further adjustment of the cam
mounting bracket is needed.
5.4.14
Adjust the oxygen flow to a point where the nitrous oxide flowmeter
indicates 10 liters per minute.
NOTE:
Steps marked with an asterisk (*) do not apply to later model
machines that do not have the O
2
/N
2
O ratio lamp on the alarm
channel.
5-11
Содержание Narkomed 2B
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