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8.8.5 O
2
Blender Alarm
Set Blender to 60%. Disconnect air supply from wall outlet, an audible alarm should
be heard from blender. Reconnect air supply, alarm should self cancel. Disconnect
O
2
supply, an audible alarm should be heard from blender. Reconnect O
2
supply,
alarm should self cancel.
8.9 Condition of O
2
Cell.
Set blender to 100% and observe that displayed FIO
2
is 100%.
Set blender to 21% and observe that displayed FIO
2
is 21%.
If the reading does not reach 100% then the cell requires adjustment.
To adjust the O
2
cell reading , set blender control to 100%.
Disconnect air supply hose from the wall socket and allow 3 minutes before adjusting
control on rear panel. See “Rear Panel” on page 43. for position of control).
If unable to set 100%, O
2
Cell must be replaced.
Ignore any blender alarms during this adjustment.
8.10 Completing Functional Testing
Return all the pressure regulators to minimum.
Set the Pressure display switch to
MIN.
Set the
CPAP alarm
control to
-5 cm
2
O
and the
PIP alarm
control to
60 cmH
2
O.
Turn the mode switch to OFF
Functional testing is now complete.
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