6-6
NOTE
z After doing the cylinder tests, close all cylinder valves if cylinder supplies are not
used.
z Turn the flow controls slowly. Do not turn further when the flow indicated on the
flowmeter is outside of the range to avoid damaging the control valve. When the
flow control is turned to the minimum, the reading indicated on the flowmeter
should be zero.
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.
6. Test the O
2
-N
2
O Link system with flow increasing:
Turn the N
2
O and O
2
flow controls fully clockwise (minimum flow). Then turn the N
2
O
flow control counterclockwise and set the N
2
O flow control to the rates shown in the
table. The O
2
flow must meet the requirement listed in the following table.
Step N2O flow (L/min) O2 flow (L/min)
1 0.6 ≥0.2
2 1.5 ≥0.5
3 3.0 ≥1.0
4 7.5 ≥2.5
7. Test the O
2
-N
2
O Link system with flow decreasing:
Turn the N
2
O and O
2
flow controls and set the N
2
O flow to 9.0 L/min and the O
2
flow to
above 3 L/min respectively. Then slowly turn the O
2
flow control clockwise and set the
N
2
O flow control to the rates shown in the table. The O
2
flow must meet the requirement
listed in the following table.
Step N2O flow (L/min) O2 flow (L/min)
1 7.5 ≥2.5
2 3.0 ≥1.0
3 1.5 ≥0.5
4 0.6 ≥0.2
8. Disconnect the O
2
pipeline supply or close the O
2
cylinder valve.
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