NAVI D-25 Instruction Manual page 171

6 Maintenance and Troubleshooting
6.5 Troubleshooting
● ERR No.05 Electrode sensitivity error (pH)
160
Explanation
The electrode sensitivity is either 105% or more or 85%
or less than the theoretical sensitivity.
Cause
The electrode is
dirty.
The electrode is
cracked.
Calibration was
not performed
correctly.
There is a
problem with the
standard solution.
The electrode is
not connected
correctly.
Electrode is not
submerged
deeply enough to
cover reference
junction.
How to solve problem
Wash the electrode.
Replace the electrode.
Redo the calibration correctly.
Use fresh standard solution.
Connect the electrode correctly.
Immerse the electrode in the
sample at least three centimeters
deep.
HORIBA