6-7
NOTE
z When O
2
supply is disconnected, alarms for [O2 Supply Failure] and [Drive Gas
Pressure Low] occur as O
2
pressure decreases.
9. Set the system switch to the position.
6.6.2 With O2 Sensor
Do as described in 6.9.2 Test the O2 Concentration Monitoring and Alarms before testing.
To do the flow control system tests:
1. Connect the pipeline supplies or slowly open the cylinder valves.
2. Turn all flow controls fully clockwise (minimum flow).
3. Set the system switch to the position.
4. Do not use the system if low battery or other ventilator failure alarms occur.
5. Adjust all gas flows to minimum.
Steps 6 and 7 are only for systems with N
2
O.
WARNING
z During steps 6 and 7, the O
2
sensor used must be correctly calibrated and the Link
system should be kept engaged.
z Adjust only the test control (N
2
O in step 6 and O
2
in step 7).
z Test the flows in sequence (N
2
O then O
2
).
6. Test the O
2
-N
2
O Link system with flow increasing:
îš‹ Turn the N
2
O and O
2
flow controls fully clockwise (minimum flow).
îš‹ Slowly turn the N
2
O flow control counterclockwise.
îš‹ Make sure that the O
2
flow increases. The measured O
2
concentration must be
≥21% through the full range.
7. Test the O
2
-N
2
O Link system with flow decreasing:
îš‹ Turn the N
2
O flow control and set the N
2
O flow to 9.0 L/min.
îš‹ Turn the O
2
flow control and set the O
2
flow to 3 L/min or higher.
îš‹ Slowly turn the O
2
flow control clockwise.
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