Chapter 6 Maintenance and Troubleshooting
6.2 Troubleshooting
80
HORIBA
●
ERR 04 Asymmetric potential error
Explanation
The asymmetric potential of the electrode is 45 mV or more.
●
ERR 05 Electrode sensitivity error (pH)
Explanation
The electrode sensitivity is either 105% or more or 85% or less than the
theoretical sensitivity.
Cause
How to solve problem
The electrode is dirty.
Wash the electrode.
The electrode is
cracked.
Replace the electrode.
The reference solution
concentration is
fluctuating.
Replace the internal solution in the reference
electrode.
The electrode is not
connected correctly.
Connect the electrode correctly.
The electrode is not
submerged deeply
enough to cover the
liquid junction (tip).
Immerse the electrode in the sample at least
three centimeters deep.
There is problem with
the standard solution.
Prepare new standard solution.
Cause
How to solve problem
The electrode is dirty.
Wash the electrode.
The electrode is
cracked.
Replace the electrode.
Calibration was not
performed correctly.
Redo the calibration correctly.
There is a problem
with the standard
solution.
Use fresh standard solution.
The electrode is not
connected correctly.
Connect the electrode correctly.
Electrode is not
submerged deeply
enough to cover
reference junction.
Immerse the electrode in the sample at least
three centimeters deep.
