LTV 1200 Operator's Manual - CareFusion Emergency Preparedness

Transducer Autozero
Use the Transducer Autozero menu to manually schedule transducer autozeros and to view previous
autozero results. Autozeros are automatically scheduled at appropriate intervals during ventilator
operation, so manual scheduling of autozeros is not commonly performed, but may occasionally be
done.
The menu is set up as follows:
XDCR ZERO
AP xxxx P
FDb xxxx P
FDw xxxx P
FDn xxxx P
Airway Pressure Transducer Autozero
Use this item to view the Airway Pressure Transducer Autozero results and schedule the Airway
Pressure Transducer Autozero to be run.
To view the Airway Pressure Transducer Autozero results:
1) The previous results, AP xxxx P, are displayed. The final P indicates the previous zero results
were within the required tolerance and the previous autozero passed. If a final F is displayed, the
previous zero results were outside the required tolerance and the autozero failed. An asterisk
indicates that an autozero is scheduled for the next breath.
2) Turn the Set Value knob to display the EXIT option.
3) Push the Select button.
To schedule the Airway Pressure Transducer Autozero:
1) The previous results, AP xxxx P, are displayed.
2) Push the Select button. An asterisk appears, the pass / fail indicator is removed from the display
and the test is scheduled for the next breath.
3) After the autozero is run on the next breath, the new autozero value and the pass / fail indicator
are displayed.
If an autozero fails, it will be automatically rescheduled for the next breath.
Page 10-28 LTV ® 1200 Ventilator Operator’s Manual
p/n 18247-001, Rev. G