Page 6-6 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Vent Maintenance Entry Alarm
When you power the ventilator on in Vent Maintenance mode, REMOVE PTNT is displayed
and the audible alarm sounds to remind you to remove the patient from the ventilator and
use an alternate method of ventilation.
To clear the REMOVE PTNT alarm:
1) Press the Silence Reset button.
2) The first Ventilator Maintenance menu, VENT MTNCE
, is displayed.
Calibration
The Calibration menu is used to calibrate the pressure transducers and flow valve motor
speed for the ventilator. A Calibration Worksheet for recording calibration results is provided
at the end of this section.
To Enter the Calibration Menus
1) Rotate the Set Value knob until VENT OP is displayed. Press Select.
2) Rotate the Set Value knob until COM SETTING is displayed, then press Select.
3) Rotate the Set Value knob until DATA is displayed, then press Select.
12
4) Press Control Lock, then turn the Set Value knob until VENT MTNCE displays.
5) Press Select then select CALIBRATION.
The calibration menu is set up as follows:
CALIBRATION
AIRWAY
FLOW DIFF
VALVE DIFF
PPP
O2 INLET (LTV
®
1200 only)
MOTOR DRIVE
CAL EXIT
An asterisk (*) displayed in front of a menu item, for example:
*
FLOW DIFF indicates
that item has not been calibrated.
NOTE
When calibrating a transducer always continue uninterrupted to the completion of that
transducer. If several minutes of inactivity occur during a calibration, repeat the calibration of
that transducer as the transducer may drift over time.
For best results, run the ventilator for at least 20 minutes to warm it up prior to calibration.
If CAL FAIL appears at any time during a calibration, press Select to exit, then reenter the
calibration menu and perform the complete process again. Calibrations may fail because the
calibration pressure is unstable or outside the expected range.
12
The ventilator should be calibrated in DATA mode, to leverage the unique code and timers that make test results more
consistent.
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