Service and utility functions
4-18
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
NOTE:
To display atmospheric pressure (P
a
), enter the Service menu, then press ACCEPT to
select each of the following functions:
Sensor data
Pressure sensors
P
a
Caution
To help avoid triggering
LOW O
2
SUPPLY
or
O
2
% LOW
alarms, perform the Reg
altitude calib using the lowest oxygen supply pressure and most restrictive oxygen hose
and adapters that will be used during normal ventilation.
To avoid the possibility of entering a ventilator inoperative condition or damaging the
regulator, do not power down the ventilator during this adjustment. However, in case
of power loss to the ventilator during adjustment, follow these steps:
• Use a pressure gauge to ensure regulator pressure is below 38 psi (the ventilator will
not pass POST if regulator pressure is above 38 psi).
• At power-up, support the oxygen regulator to prevent the piston rack from hitting
the regulator.
• Once ventilator power is restored, perform the entire Reg altitude calib.
• Replace the inspiratory access panel at the end of the adjustment to support the
oxygen regulator.
You need a 3/16-in. open or box-end wrench, a 3/8-in. open or box-end wrench, and #1 and
#2 POZIDRIV™* screwdrivers to perform this adjustment.
Message window display
Description
Reg altitude calib
Press ACCEPT to begin this adjustment.
Reg altitude calib
Is P
O
calibrated?
CLEAR (N) ACCEPT (Y)
Press ACCEPT if you performed an O
2
pressure calib during this service session, or
press CLEAR if you have not yet performed an O
2
pressure calib. If you press
ACCEPT, there is a one-second burst from the high-flow solenoid.
Reg altitude calib
Perform P
O
calib
ACCEPT to proceed
If you pressed CLEAR at the previous prompt to indicate you have not yet
performed an O
2
pressure calib during this service session, this message appears to
tell you to perform that adjustment first. Press ACCEPT to exit the Reg altitude
calib, then turn the knob to select
O
2
pressure calib
.
Reg altitude calib
Excessive P
O
droop
ACCEPT to proceed
This prompt appears following the one-second high-flow solenoid burst if there is
an oxygen supply problem (oxygen regulator pressure dropped below 4 psi during
the burst), such as a disconnected or restricted supply or inadequate supply
pressure. Press ACCEPT to exit the Reg altitude calib, then resolve the oxygen
supply problem.
High Flow=xxx L/min
Calib not required
P
O
=xx.x psi
This prompt appears if the Reg altitude calib is not required, and indicates the flow
from the high-flow solenoid already set properly, and the adjustment is not
required. (
High Flow
is the measured flow during the test burst, and P
O
is the
oxygen regulator pressure.) Press ACCEPT to exit the Reg altitude calib.
High Flow=xxx L/min
Remove insp panel
ACCEPT to proceed
This prompt appears following the one-second high-flow solenoid burst if the Reg
altitude calib is required. Remove the inspiration access panel and air intake
manifold assembly (Section 8.6.6) to access the oxygen regulator. (Leave the
oxygen regulator in place, supported by the nozzles.) Press ACCEPT to continue or
CLEAR to abort the adjustment.
Summary of Contents for Puritan Bennett 700 Series
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