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Note: For field applications, it is always recommended to keep a conditioned spare
electrode handy. When anomalies cannot be resolved with simple maintenance,
change the electrode and recalibrate the meter.
TROUBLESHOOTING
Symptom Problem Solution
Slow response or
excessive drift
Dirty pH electrode Soak the electrode tip
in HI7061 solution for
30 minutes
Reading fluctuates up
and down (noise)
Clogged/dirty junction
or low electrolyte level
(refillable electrodes)
Soak the electrode tip
in warm HI7082
solution for one hour,
then rinse it with
distilled water (refill
with fresh electrolyte if
necessary)
Blinking full scale value Reading is out of range
Blinking “°C” (or “°F”) Temperature probe is not connected or broken
“WRONG” & blinking
dashes
Calibration error Check buffer solution or
replace pH electrode
Blinking battery symbol Low battery level Replace battery
Meter shuts off Auto-off enabled or
dead battery
Replace battery
“Clr” message Loaded default pH
calibration values
Perform pH calibration
“Er1” and “Er2”
messages
EPROM error Contact your local
Hanna Instruments
Office
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