GE iVent 201 Series User's Reference Manual page 123

4. If you select the Pressure graph, the choices are 80, 60, 40 cmH2O and Auto
(the default). Move the dial to choose the required value, and press the dial
to accept the new range.
If you select the Flow graph, the choices are 210, 150, 120, 90, 60 L/minute and
Auto (the default). Turn the dial to select the required value, and press to accept
the new range.
If you select the Flow graph, the choices are 210, 150, 120, 90, 60 L/minute and
Auto (the default) (Figure 101). Turn the knob to select the required value, and
press to accept the new range.
5. Turn the dial until Close is selected on the Graph Choice bar, and press the
dial to return to the Main screen.
NOTE The Select option on the bar is not active
Figure 100: Pressure Ranges
Figure 101: Flow Ranges
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4 The Main Menu