
ADJUSTMENT AND CALIBRATION PROCEDURES (continued)
NM2B
5.3
Oxygen Supply Pressure Alarm Switch Adjustment
(later machines with switch on alarm channel)
5.3.1
Disconnect all pipeline hoses and set the System Power switch to
ON
.
5.3.2
Close all cylinder valves except the O
2
valve.
5.3.3
Set the oxygen flow to 5 liters per min.
5.3.4
Open the other gas flow control valves to drain pressure from the
system.
5.3.5
Close the O
2
cylinder valve, and close the flow control valves. Press
the O
2
Flush valve to drain oxygen pressure from the system.
5.3.6
Set the System Power switch to
STANDBY
.
5.3.7
Remove the rear cover from the flowmeter housing. Remove the table
top and pull the writing or keyboard tray out to its fully extended
position.
5.3.8
Locate the TEE fitting in the ¼ in. diameter O
2
regulator output line,
and remove the plug from the TEE fitting.
5.3.9
Connect a dedicated O
2
test gauge to the TEE fitting.
5.3.10
Open the O
2
cylinder valve and set the System Power switch to
ON
.
5.3.11
Set the oxygen flow to 5 liters per min.
5.2.12
Close the oxygen cylinder valve.
5.3.12
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.
5.3.13
If the alarm activates when the pressure is below 34 psi or 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.
5.3.14
Turn the System Power switch to
STANDBY
.
5.3.15
Disconnect the test gauge and replace the plug in the regulator line
TEE fitting.
Rev. A
5-8
Содержание Narkomed 2B
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