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Masimo
Chapter 6: Troubleshooting
Troubleshooting
The following chart describes what to do if Pronto system does not operate properly or fails.
Symptom
Possible Cause
Recommendation
Difficulty or no SpHb
reading
Low battery
Interference from line
frequency induced noise
Inappropriate sensor or
sensor size
Excessive motion
Minimize or eliminate interference from
surgical or fluorescent lighting.
Verify/set 50/60hz menu setting. See
Initial Setup.
Verify use of a SpHb capable sensor.
Minimize or eliminate motion at the
measurement site.
Excessive ambient or
strobing light
Shield the sensor from excessive light.
See
Safety Information, Warnings, and Cautions
on page 9 and the
sensor
Directions for Use (DFU)
.
Unit does not power
on
Low battery
Check/replace batteries. See
Battery
Replacement
on page 57.
Continuous speaker
tone
Internal failure
Unit requires service. If audible tone
continues to sound, power down unit
and/or remove batteries. See
Return
Procedure
on page 59
Buttons don’t work
when pressed
Internal failure
Return for service. See
Return Procedure
on page 59.
Low battery alert
sounds. Battery Level
Indicator shows low
battery capacity less
than expected
capacity.
Effective spot check uses
will be reduced when
operating the device
below 5ºF (-15ºC) due to
alkaline battery
technology
Remove the batteries and allow them to
warm up to room temperature, re-install
them, and then check the battery
indicator level. If the battery capacity
remains low, replace batteries. See
Battery Replacement
on page 57.
