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Troubleshooting
Problems
Possible Cause
Display blank
Nothing appears on
the display.
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Possible Solutions
Reposition finger to activate
the device.
Verify battery is correctly
inserted. Note: If battery is
installed backwards, the unit
will not function.
Dead battery. Replace battery.
May be too cold. Allow device
to sit at room temperature for
at least 30 minutes.
If the problem persists contact
Nonin Technical Service.
Troubleshooting
Problems
Possible Cause
Missing segments
Faulty display.
on LCD display.
Low pulse quality
No readings
(no reading).
Possible Solutions
Contact Nonin Technical
Service.
If the
indicator is visible and
the pulse quality bar graph does
not show more than 2 bars, try
the following:
1. Reposition finger.
2. Warm finger by rubbing.
3. Select a different finger.
For more information, please
see Reading Your Results.
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