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Troubleshooting
Troubleshooting
Problem
Possible Cause
Possible Solution
Model 7500FO will not
activate.
The unit has no power.
Plug in the AC adapter.
Model 7500FO does not
beep during initialization
sequence.
The speaker may not be
functioning properly.
Contact Nonin Technical Service for
repair or replacement.
Model 7500FO will not
operate on batteries.
The battery pack is not charged.
Plug in the Model 7500FO AC Adapter to
charge the battery pack.
The battery pack is inoperable.
Contact Nonin Technical Service for
repair or replacement.
Unable to obtain a green
pulse display on the
bargraph.
NOTE:
In some instances,
patient perfusion may be
inadequate for pulse
detection.
The patient pulse strength is
indiscernible or perfused poorly.
Reposition the finger or insert a different
finger, and keep the sensor motionless
for at least 10 seconds.
Warm the patient’s finger by rubbing or
covering with a blanket.
Position the sensor at a different site.
Circulation is reduced because of
excess pressure on the sensor
(between the sensor and a hard
surface) after inserting finger.
Allow the hand to rest comfortably
without squeezing or pressing the sensor
on a hard surface.
The finger is cold.
Warm the patient’s finger by rubbing or
covering with a blanket.
Position the sensor at a different site.
The sensor is applied incorrectly.
Apply the sensor correctly.
There is possible interference
from one of the following sources:
• arterial catheter
• blood pressure cuff
• electrosurgical procedure
• infusion line
Reduce or eliminate any interference.
Make sure that the sensor is not placed
on the same arm being used for other
patient therapies or diagnostics (e.g.,
blood pressure cuff).
The red LED is not lit in the
sensor’s finger insertion area.
Ensure the sensor is securely attached to
the Model 7500FO.
Check the sensor for any visible signs of
deterioration.
Contact Nonin Technical Service.