Covidien Puritan Bennett 700 Series, Service Manual

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Service and utility functions
Puritan Bennett™ 700 Series Ventilator System Service Manual 10070389 Rev. A 4-19
Figure 4-5. Adjusting oxygen regulator pressure
High Flow=xxx L/min
Calibration aborted If you pressed CLEAR at the previous prompt to indicate you want to abort the Reg
altitude calib, this message appears. Press ACCEPT to exit the adjustment.
High Flow=xxx L/min
Adjust to xx.x psi
P
O
=xx.x psi
When you see this message, turn the 3/8-in. wrench counterclockwise to loosen the
lock nut at the top of the oxygen regulator, then use the 3/16-in. wrench to turn
the adjustment screw at the top of the regulator and adjust regulator pressure to
the displayed value as shown in Figure 4-5 (turning the screw counterclockwise
reduces pressure).
The message P
O
=xx.x psi shows the real-time regulator presure as you make this
adjustment. Press ACCEPT once you have adjusted regulator pressure.
High Flow=xxx L/min
Reg pres unchanged
ACCEPT to proceed This message indicates oxygen regulator pressure remained within 0.2 psi of the
initial pressure (that is, regulator pressure was not adjusted). Use the 3/8-in. wrench
to re-tighten the lock nut at the top of the oxygen regulator. Press ACCEPT to exit
the adjustment.
High Flow=xxx L/min
Default pressure set
Replace insp panel This message indicates regulator pressure has been reset to the factory default
value of 33 ± 2 psi. Use the 3/8-in. wrench to re-tighten the lock nut at the top of
the oxygen regulator. Replace the inspiratory access panel, then press ACCEPT to
exit the adjustment.
High Flow=xxx L/min
Calibration passed
Replace insp panel This message indicates the Reg altitude calib was successful. Use the
3/8-in. wrench to re-tighten the lock nut at the top of the oxygen regulator.
Replace the inspiratory access panel, then press ACCEPT to exit the adjustment.
If the calibration passes, press ACCEPT to return to the
Calibration tests menu. If
you do not intend to perform any other calibration functions, turn the knob to
access
Exit testing ; otherwise, turn the knob to access another calibration function.
Message window display Description
7-00257
Use 3/8-in. wrench
to loosen/tighten
lock nut
Bleed port
Use 3/16-in. wrench
to loosen/tighten
adjustment screw
Adjustment
screw
Lock nut
Top of regulator