Salter Labs PRO2 Check Operation Manual page 8

Trouble Shooting Checklist (Continued)
Complaint
Display shows "err"
during calibration
Display shows "err"
during use
"LO BATT"
appears in display
screen when unit is
turned on
Display shows "err"
or a reading other
than 100% ± 2% after
full calibration
Probable Cause
Calibration was
performed incorrectly
or wrong calibration
gas was used.
Unit has made a reading
outside normal ranges.
Battery is low.
Unit may have been
used to check a
concentrator with a
humidifier bottle in line
or water has gotten
inside of unit.
PRO
Ultrasonic Oxygen Indicator
Suggested
Corrective Action
Ensure U.S.P. oxygen
(> 99.0%) is being
used and re-perform
procedure according to
directions in the
Operation Manual.
Check calibration.
Make sure gas being
measured is from
oxygen concentrator.
Change battery.
Call Salter Labs'
Customer Service
Department at
(800) 235-4203 for
authorization to return
unit for repair.
®
check
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