36
Certifier
®
FA Plus Test System
Symptom
Possible Cause
Corrective Action
Volume, minute
volume, peak flow,
peak pressure, PEEP,
respiratory rate, or I:E
ratio measurements
are not updated or
incorrect.
Less than two
consecutive full breaths
have been supplied to
flow module, or flow is not
supplied as a breathing
waveform.
Wait for at least two consecutive
full breaths to be supplied to the
flow module.
Auto-trigger not optimized
for current waveform.
Ensure that flow is supplied as a
breathing waveform.
Manually set flow trigger level.
Airway restrictor causing
flow disturbance next to
flow module.
Use the TSI Airway pressure
fitting which contains the screen
between the flow module and
the test lung (see Figure 12).
Flow condition causing
oscillations in the
waveform.
Minimize length of tubing
between the test lung and the
airway pressure fitting.
I:E ratio or I time
readings do not
appear correct.
It is possible the
inspiratory pause function
is turned on inside the
ventilator.
Select the I time parameter T
I+P
and ratio parameter I:E
IP
to be
on the display when the
inspiratory pause feature is
activated on the ventilator. See
the difference between T
I
and
T
I+p
.
Another option is to turn off the
inspiratory pause feature on the
ventilator.
Cannot zero low-
pressure or high
pressure transducer.
Transducer is connected
to a pressure source.
Disconnect pressure tubing from
flow module and then zero low-
pressure transducer.
Cannot zero
barometric pressure
transducer.
Barometric pressure
transducer does not
require a zero calibration.
Resume normal system
operation.
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