Symptom Possible cause Suggested action
Values are too high (consistently) Pressure connection is partially
obstructed
Remove any foreign substance from the
flow transducer or pressure tubing.
Predictive values are blank The selected norm does not support
certain values, and composite norm
values are disabled
Re-enter age/birth date, height,
gender, race. (Fill in the fields. All
mandatory fields must be filled in
before you can proceed.)
Enable composite norm values. See
View or change the spirometry settings
in the spirometry manual entitled CP
150 spirometry option, Directions for
use (English-only).
The flow sensor has been dropped. Accident Recalibrate. See Perform a calibration
in the spirometry manual entitled CP
150 spirometry option, Directions for
use (English-only).
Report does not print parameters or
graphs.
Improper parameter settings Check print settings. See View or
change the spirometry settings in the
spirometry manual entitled CP 150
spirometry option, Directions for use
(English-only).
Patient test values differ from values
expected by physician.
Various If the transducer is contaminated with
sputum or secretions, replace it.
Verify that proper barometric pressure
has been entered. See Perform a
calibration in the spirometry manual
entitledCP 150 spirometry option,
Directions for use (English-only).
Verify the patient data.
Eliminate any leaks in the pressure
tubing.
Retest using a nose clip.
Replace the sensor if damaged.
Recalibrate.
Replace the transducer and retest.
68 Troubleshooting CP 150 12-lead resting electrocardiograph
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