GE TruTrak+ 3900 User Manual page 51

Message
INSUFFICIENT LIGHT
INTERFERENCE DETECTED
LIMITS SAVED
LOW SpO 2 = XXX
LOW BATTERY
LOW QUALITY SIGNAL
(appears only in serial
communication output)
NO SENSOR
(also see
CHECK SENSOR SITE)
Possible cause(s)
Dirt on the sensor emitter or
detector. Sensor detector failure.
Test site dirty. Misaligned or
poorly positioned sensor.
Insufficient light penetrating the
tissue site. Dark pigmentation.
Fingernail polish present.
Appears when the signal is too
erratic to be processed due to
proximity of other electrical
equipment generating high-
frequency electromagnetic noise.
Appears during power-up
sequence if low SpO limit saved
2
is below 80%. XXX represents the
numerical limit or OFF.
Appears when 5 to 15 minutes of
battery operation remain.
Sensor off patient.
Perfusion insufficient for valid
readings. Motion at sensor site,
electrical noise, or incorrect
sensor placement.
Sensor not connected or not fully
inserted into the sensor connector.
May be an incorrect sensor.
3/Messages and Troubleshooting
Recommended action(s)
Clean the sensor (if reusable) or
replace it.
Clean the test site. Reposition the
sensor or select another test site.
Reposition the sensor or select
another test site.
Remove polish or select another
test site.
No action required. May be
caused by strong radio frequency
(RF) interference possibly
generated by electrosurgery.
SpO and PR readings do not
2
change during detected inter-
ference (or become dashes if
interference persists). When
interference ceases, signal
processing resumes.
No action required. This is an
operator alert message. Make sure
to change a limit that may be too
low.
Plug the oximeter into the AC
power supply to recharge the
battery and continue monitoring.
Important: To prevent permanent
damage to the battery, recharge a
discharged battery within eight
hours after the LOW BATTERY
message is displayed.
Reattach the sensor.
Check patient and oximeter setup.
Insert sensor cable into the
connector.
Refer to the instructions for the
sensor you are using.
3-3