Chapter 3
Theory of Operation
REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-9
Alarm Settings
Options
Apnea
The length of time without a
spontaneous breath that triggers the
Apnea alarm
Range: 20, 40, 60 sec or OFF
Default setting: 20 sec
#Apnea
The number of periods (10-seconds or
more) in the previous hour where the
patient has not initiated a
spontaneous breath.
NOTE: For the first hour, this value is
an estimate only.
Range: 5, 10, 20, or OFF
Default setting: OFF
Display Units
Unit of pressure: centimeters of water
(cmH
2
O), hectoPascals (hPa), or
millibars (mbar).
Range: cmH
2
O, hPa, or mbar
Alarm Volume
Audible alarm volume
Range: OFF, or minimum volume, to
maximum volume, in 5 discrete
settings.
Contrast
Screen contrast
Range: 20% to 100%
Brightness
Screen brightness
Range: 10% to 100%
Reverse Video
Toggles reverse video
Range: ON or OFF
Screen Lock Timer Range: ON or OFF