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6.3 Push and turn knob (3)
The push and turn knob is the sole method of selection and adjustment of driver
parameters.
6.3.1 Operation
To select a parameter rotate the knob in either direction (clockwise or anti
clockwise). Once the user has started to rotate the % Oxygen parameter will start
to flash, continue to rotate the knob and the user will cycle through the adjustable
parameters or selectable displays (dependent on mode the user has selected).
Each display will start to flash when selected. To adjust the parameter or display
press the knob to activate and rotate to change the setting or message. When the
required setting has been set, press the knob to confirm.
Note: The selection will time-out after 8 seconds if the confirm button is not
pressed. There is also a 2 second delay between button pushes.
6.4 Audio paused and boost buttons (4)
6.4.1 Audio paused
When an alarm threshold has been crossed an alarm signal is
triggered. This consist of two components, visual and audible.
Pressing the audio paused button, mutes the audible
component of the alarm for 120 seconds.
Pressing the audio paused when no alarms are active, mutes
the unit for a period of 120 seconds. For any alarms generated within this period
only the visual component will activate.
The unit will display the text “Audio Paused” and will alternate this message with
any alarm message in an alarm condition.
Pressing the button for a second time in audio paused mode will revert the unit to
normal operation.
Note: Any latching alarms active during audio paused mode are reset on the
second press of the button. See “Latching and non latching alarms” on
page 98.
6.4.1.1 Audio paused alarm setting
In the flow mode if the button is held down for 4 seconds it sets the High leak and
Exhaust Impeded alarm thresholds ±2mbar around the delivered CPAP pressure.
6.4.2 Boost button
This delivers an up to 3 mbar of gas as long as the user holds
the button down for a maximum of 30 seconds. After 30
seconds the unit stops the boost, but the user can re-apply the
boost by repressing the boost button.
6.5 Light bar (5)
The light bar illuminates in an alarm condition. Red for high priority alarms, Yellow
for medium priority alarms and Blue for low priority and technical alarms.
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