DeVilbiss 9001 Series Instruction Manual page 10

18
Pressure sensor – purpose, type, sensing position, range, conditions of measurement
The pressure sensor in Model 9001 measures the CPAP pressure inside the CPAP
during operation. This measurement is used by the blower control circuit to cor-
rect the output pressure for mask leaks and altitude changes. The measured pres-
sure is viewable by the PDA Remote. The pressure sensor is a silicon diaphragm
type sensor with an input range of 0 to 25.4 cmH2O. The measurement type of
the sensor is "gauge" (relative to atmospheric pressure, ATPD).
General Info
Filters
Standard filter is designed to filter particles larger than 3 microns in size. The CPAP
unit must have the standard filter in place during operation. This filter should
be replaced if every 6 months or if it is damaged.
Optional Fine Particle Filter is designed to filter particles larger than 0.3 microns in
size. The fine particle filter is placed in the filter area of the CPAP air intake
with the standard filter placed over the fine particle filter. The optional fine par-
ticle filter should be replaced every 30 days or if it appears damaged.
Interdependence of Controls – (settings that affect one another) The following
settings on Model 9000 affect each other and must be set in the order listed to
obtain the correct CPAP pressure:
• Set Pressure
• Altitude
• Fine Adjust
The CPAP Pressure Setting (Set Pres) determines the pressure for normal opera-
tion. The Set Pres value does not change when adjustments are made to Altitude
or Fine Adjust settings.
The Manual Altitude Adjustment in Model 9000 allows a patient to adjust the
pressure output of the CPAP to compensate for altitude changes when travelling.
Changing the Altitude setting changes the CPAP pressure by up to 15% of the
CPAP setting to correct for changes in barometric pressure at different altitudes.
The Fine Adjustment Control, available only during setup of the 9000 CPAP, adds
or subtracts from the CPAP setting to obtain the desired pressure as measured by
an external manometer.
The Delay Time and Delay Pressure operate the CPAP at a lower pressure for a
preset period of time before reaching the prescribed CPAP pressure. The Altitude
and Fine Adjust settings affect the Delay Pressure in the same way they affect
the CPAP pressure.
Accuracy and range of displayed values and calibrated controls Model 9001
Pressure sensor – max zero error = ± 1 cmH2O
Sensitivity = ± 2% FSO+4% reading
SE-900
S p e c i f i c a t i o n s S p e c i f i c a t i o n s
9000/9001 Series CPAP operation after interruption and restart of power supply
The CPAP will turn off if power is turned off or disconnected. When power is
restored, the CPAP will return to the prescribed pressure setting within 2 seconds.
9000 Series CPAP responds to the following conditions:
Meets Spec:
Amb Temperature +5°C to +40°C
Amb Humidity 10% to 95% RH
Atmos. Pressure 700 mbar to 1060 mbar
AC supply voltage range -15% to +10% of declared nominal (100-240V)
DC supply voltage range -15% to +25% of declared nominal (12 VDC)
19
9000 9001
SE-900