3-13
3.7.4 APL Valve Test
1. Make sure that the system is Standby. If not, press the key and select [Ok] from the
pop-up menu to enter Standby.
2. Set the bag/mechanical ventilation switch to the bag position.
3. Connect the manual bag to the manual bag port.
4. Connect the Y piece on the breathing tube to the leak test plug on the manual bag port.
5. Turn the APL valve control to let the pressure of APL valve stay at 30 cmH
2
O.
6. Push the O2 flush button to inflate the manual bag.
7. Make sure that the reading on the airway pressure gauge is with the range of 20 to 40
cmH
2
O.
8. Turn the APL valve control to the MIN position.
9. Set the O
2
flow to 3 L/min. Turn any other gases off.
10. Make sure that the reading on the airway pressure gauge is less than 5 cmH
2
O.
11. Push the O
2
flush button. Make sure that the reading on the airway pressure gauge does
not exceed 10 cmH2O.
12. Turn the O
2
flow control to set the O
2
flow to minimum. Make sure that the reading on
the airway pressure gauge does not decrease below 0 cmH
2
O.
NOTE
z If the accuracy of the APL valve exceeds the range, refer to 4.6Adjust the APL
Valve.
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