NAVI D-25 Instruction Manual page 169

6 Maintenance and Troubleshooting
6.5 Troubleshooting
● ERR No.03 Electrode stability error
158
Explanation
The electric potential did not stabilize within three
minutes.
Cause
This is caused by
the sample
solution (when
the sample
solution is pure
water or another
solution with low
conductivity or the
pH concentration
or temperature
change).
The electrode is
dirty.
The electrode is
cracked.
The responsive
glass membrane
of the electrode
has been dry for a
long time.
The temperature
of the sample
solution is
fluctuating.
How to solve problem
Press the MEAS key again while
"HOLD" is either brinking or steadily
lit in the display, to measure the
sample using instantaneous value
measurement.
Wash the electrode.
Replace the electrode.
Soak the membrane (on the
electrode) in pure (de-ionized)
water for 24 hours.
Measure after the sample solution
temperature stabilizes.
HORIBA