LTV 1150 - Page 276

Page 9-20 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
8) Perform a Servo test.
Connect the ventilator to a high pressure oxygen source. Connect an oxygen sensor to
the 22 mm outlet port on the right side of the ventilator (for fastest response), or to the
Patient Circuit Wye.
NOTE
Oxygen source and tested O
2
% only apply to the LTV
®
1200 model. When testing the
LTV
®
1150 model, set turbine speed and flow only.
A) Set flow (listed under Insp. Time) to 10,
turbine speed (listed under High Press
alarm) to 4000, and % O
2
to 30, O
2
Inlet
to 40 PSI.
Press Manual Breath.
• Flow (BTPD) must be 10 ± 0.5 Lpm
74
• % O
2
must be 30 ± 3%.
B) Set flow to 10, turbine speed to 5000,
and % O
2
to 90, O
2
Inlet to 50 PSI.
Press Manual Breath.
• Flow (BTPD) must be 10 ± 0.5 Lpm
74
• % O
2
must be 90 ± 5%.
C) Set flow to 50, turbine speed to 4000,
and % O
2
to 60, O
2
Inlet to 60 PSI.
Press Manual Breath.
• Flow (BTPD) must be 50 ± 7.5 Lpm
• % O
2
must be 60 ± 5%.
D) Set flow to 90, turbine speed to 7000,
and % O
2
to 90, O
2
Inlet to 50 PSI.
Press Manual Breath.
• Flow (BTPD) must be 90 ± 13.5 Lpm
• % O
2
must be 90 ± 5%.
E) Return flow setting to 10 Lpm.
9) Perform a Solenoids test.
A) Set the step position to100,
turbine speed to 4000, and turn
on only the ExhPilot solenoid.
After reading, turn the ExhPilot
solenoid off.
• Pressure at the exhalation drive port must
be 0 ± 0.1 cmH
2
O before and ≥ 14 cmH
2
O
after activating the solenoid.
B) Set the step position to 100,
turbine speed to 4000, and turn
only the Purge solenoid on.
After reading, turn the Purge
solenoid off.
• Pressure at the High and Low flow XDCR
ports must be 0 ± 0.1 cmH
2
O before and ≥
14 cmH
2
O after activating the solenoid.
C) Turn the PPin and PPout
solenoids on.
• Pressure at the exhalation drive port must
be ≥ 14 cmH
2
O.
D) Turn the PPin solenoid off. Set
the turbine speed to 10 and
monitor the PPP transducer
reading.
• The PPP pressure displayed must be ± 0.5
cmH
2
O of the applied pressure
• Leakage rate must be ≤ 1 cmH
2
O within
one minute
74
If Flow is not within the specified limits, recalibrate the Flow Valve (see page 6-25) and repeat the
Performance Checkout tests.