LTV 1150 - Page 274

Page 9-18 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
6) Perform a Real-time Transducer test. Turn the ventilator off. Turn the ventilator on while
holding the Select button. Clear the REMOVE PTNT alarm, and then turn to the RT
XDCR DATA menu and press Select. Turn the Set Value knob to display the required
data.
Airway Pressure Transducer
A) Open all connections to ambient air
to apply 0 cmH
2
O to high flow
XDCR port.
• AP display must read 0 ± 0.5 cmH
2
O.
B) Apply 50 cmH
2
O ± 2 cmH
2
O to high
flow XDCR port.
• AP display must read the applied
pressure ± 2 cmH
2
O.
Flow Transducer Wide
C) Open all connections to ambient air
to apply 0 cmH
2
O to both flow
XDCR ports.
• FDw display must read 0 ± 0.5
cmH
2
O
D) Apply 15 cmH
2
O ± 0.5 cmH
2
O to
high flow XDCR port.
• FDw display must read the applied
pressure ± 0.5 cmH
2
O
E) Apply 15 cmH
2
O to high and low
flow XDCR port. Record the FDw
value. Open all connections to
ambient air.
• FDw display must read 0 ± 0.5
cmH
2
O
Flow Valve Differential Transducer
F) Turn the ventilator off. Turn the ventilator on while holding the Select, Control
Lock, and Manual Breath buttons (3-finger mode
73
). Clear the REMOVE PTNT
alarm, then turn to the VENT MTNCE menu and press Select.
G) Press Select to enter the Servo
menu, use the Set Value knob to
select ON, and press Select. Set
step position (listed under Tidal
Volume) to 500 and turbine speed
(listed under High Press alarm) to
10. Return to the RT XDCR DATA
menu and view FVd.
• FVd display must read 0 ± 0.5 cmH
2
O
H) Set step position to 100 and turbine
speed to 4000. Return to the RT
XDCR DATA menu and view FVd.
• FVd display must read ≥ 14 cmH
2
O
O
2
Transducer (LTV
®
1200 only)
I) Open O
2
connections to ambient.
View the O
2
reading under the RT
XDCR DATA menu.
• O
2
display must read 0 ± 0.5 PSIG
J) Apply 50 ± 2 PSIG to O
2
inlet port.
• O
2
display must read the applied
pressure ± 2 PSIG
73
Using the 3-finger technique enables a modified mode of VENT MTNCE in which testing may be performed,
but Calibration procedures and changing Configuration settings can not.