LTV 1150 - Page 278

Page 9-22 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
11) Perform an LTM Compatibility test.
A) Set the COM setting in Extended
Features to MONITOR
B) Connect the LTM serial
communication cable to the UUT
COMM PORT on the left side of
the UUT.
Connect patient circuit and test
lung or test lungs.
Observe the icon and red
exclamation mark for at least 30
seconds.
• Display of small LTV icon appears on the
LTM. If the
LTV
®
icon is not observed, or
shown only intermittently, then this
condition constitutes a FAIL for the LTM
compatibility test.
• (LTM with software 1.17 or earlier) A red
exclamation mark is displayed to the
right of the
LTV
®
icon. The exclamation
mark may be flashing.
C) Press the Wave button on the
LTM.
Select the Wave screen.
• Waveforms are displayed in all three
waveform charts.
• The Vte value displayed to the left of the
lower waveform chart on the LTM must
be equal to the value shown in the LTV
®
status monitor window.
D) Set the Low Minute Volume
alarm to 99 Lpm.
• LOW MIN VOL alarm will occur.
,
• LTM status bar is flashing red with the
text “Low Minute Volume” displayed.
E) Reset the Low Minute Volume
alarm by returning the
Low Min
Vol
to its previous value and then
pressing the Silence Reset button
twice on the LTV
®
.
• Verify the red “Low Minute Volume”
status bar is removed from the LTM.
F) Disconnect the LTM serial
communication cable from the
LTV
®
COMM PORT.
12) Perform a Flow Valve Leak for I/E Hold.
A) Power up ventilator in VENT
MTNCE mode (i.e.: using the
“three finger mode
77
” hold down
Control Lock,
Manual Breath
and
Select while powering up the
ventilator) enter VENT MNTCE.
B) Turn on SERVO mode.
C) Set the step position to 0 (in the
Tidal Volume window)
D) Measure the flow at the OUTLET
port of the ventilator.
• Flow must be less than 1 Lpm.
77
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.