19
SYMPTOMS
PROBLEM
SOLUTION
Slow response/
excessive drift.
Dirty pH electrode.
Clean the electrode and
then soak the tip in
HI7061
or
HI8061
for
30 minutes.
Readings fluctuate
up and down
(noise).
Clogged/dirty junction.
Low electrolyte level
(refillable electrodes
only).
Clean the electrode. Refill
with fresh solution (for
refillable electrodes only).
Check cable and connector.
The meter does
not accept the
buffer solution for
calibration.
Dirty electrode or
contaminated buffer.
Follow the cleaning
procedure. If still no results,
replace the electrode.
Replace Buffer.
If the display shows
“pH”
and
“-2.00”
or
“16.00”
blinking.
Out of range in the pH
scale.
a) Verify that the electrode
is connected.
b) Verify that the shipping
cap has been removed.
c) Recalibrate the meter.
d) Make sure the pH sample
is in the specified range.
e) Check the electrolyte level
and the general state of the
electrode.
The display
shows
“mV”
and
“-2000”
or
“2000”
blinking.
Out of range in the mV
scale.
Verify that the electrode is
connected.
The meter does
not work with the
temperature probe.
Broken temperature
probe.
Wrong temperature
probe used.
Replace the temperature
probe.
The meter fails to
calibrate or gives
faulty readings.
Broken pH electrode.
Replace the electrode.
At startup the me-
ter displays all LCD
tags permanently.
One of the keys is stuck. Check the keyboard or
contact the vendor.
“
Err xx
” error
message displayed.
Internal error.
Power off the meter and
then power it on. If the
error persists, contact the
vendor.
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