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13. TROUBLESHOOTING
SYMPTOMS
Slow response /
excessive drift
Reading fluctuates
up and down (noise)
Full scale value
displayed blinking
mV scale out of range
°C or °F displayed blinking
Meter does not work with
temperature probe
Meter fails to calibrate or
gives faulty readings
"WRONG CAL" is displayed
during pH calibration
"Internal Er X"
"CAL ERROR"
PROBLEM
Dirty pH electrode
Clogged/Dirty junction.
Low electrolyte level
(refillable electrodes only)
Reading out of range
Dry membrane or dry junction
Out of order temperature probe
Broken temperature probe
Broken pH electrode
Wrong or contaminated buffer
Internal error
Loaded default
pH calibration values
TROUBLESHOOTING 41
SOLUTION
Soak the electrode tip in
MA9016 for 30 minutes, then
follow the cleaning procedure
Clean the electrode.
Refill with fresh electrolyte
MA9012
Check if the sample is
within measurable range;
check electrolyte level and
general electrode status
Soak electrode in MA9015
storage solution for at least
30 minutes
Replace temperature probe
Replace temperature probe
Replace electrode
Check that buffer solution is
correct and fresh
Restart the meter.
If error persists, contact
Milwaukee Technical Service.
Perform pH calibration
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