LTV 1150 - Calibrate the Airway Pressure Transducers

p/n 18603-001, Rev. C LTV
®
1200/1150 Ventilator Service Manual Page 6-9
Calibrate the Airway Pressure Transducers
1) Press the Select button while AIRWAY is displayed.
AP 50
C
M
H
2
O is displayed.
2) If necessary, disconnect the High and Low pressure sense lines from the side of the
ventilator:
3) Connect the male Luer fitting from the calibration syringe assembly to the high pressure
female Luer fitting on the ventilator. Pinch the clamp on the low pressure side between
the calibration syringe assembly and the female Luer fitting. Increase to and maintain
the pressure at 50.0 cmH
2
O ± 0.2 cmH
2
O pinch the clamp near the syringe to hold the
pressure steady.
4) Observe the numbers displayed in the Tidal Volume window. When the displayed
value is stable, press Select.
Record that value on the Calibration Worksheet.
AP 0
C
M
H
2
O is displayed.
5) With the high and low pressure sense lines disconnected from the side of the ventilator
so that the connection(s) are open to ambient room air, observe the numbers displayed
in the Tidal Volume setting window. When the displayed value is stable, press Select.
Record that value on the calibration worksheet.
FLOW DIFF is displayed if the calibration was successful.
6) If CAL FAIL appears at any time, press Select to exit the calibration. When AIRWAY is
displayed, press Select and perform the calibration again.