TruSat User’s Guide
3–4
Situation Cause Recommendation
Pulse rate and/or pleth bar
vary significantly from the
palpated pulse rate.
Incorrect sensor placement, motion
at the sensor site, low signal
strength, or electrical interference. A
cough or other hemodynamic
pressure disturbance can also
disrupt the signal.
• Apply the sensor as directed in the
instructions for the sensor.
• Restrict motion at the sensor site,
choose a site where motion is less likely,
or use an adhesive sensor.
• Remove sources of electrical
interference, such as electrosurgical and
electronic devices.
Displayed values and/or
pleth bar do not correlate
to the physiological
condition of the patient.
Electromagnetic interference.
Remove the source of electromagnetic
interference. Use the monitor within its
intended electromagnetic environment.
Tones did not sound during
startup.
Alarm system failure or internal
malfunction.
Power OFF, then ON again. If the tones do
not sound, DO NOT use the monitor.
Contact authorized service personnel.
Display is blank.
Continuous tone may
sound.
Internal malfunction.
Power OFF, then ON again. If the problem
persists, contact authorized service
personnel.
Monitor will not power ON. Battery is completely depleted or
has failed.
Connect the monitor to external power and
charge the battery for up to 30 minutes
before attempting to power ON.
NOTE: After recharging a battery that was
completely depleted, it may be necessary
to cycle power ON/OFF several times.
If the problem persists, contact authorized
service personnel.
Power button or Alarm
Silence button is not
working.
Button is stuck due to debris (lint, for
example), button is damaged, or a
circuit board is faulty.
Contact authorized service personnel.
Power supply cable
disconnects easily from the
power jack.
Worn or damaged power jack
assembly.
Contact authorized service personnel.
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