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9.2 Conductivity Troubleshooting
Symptom
Possible Causes
Remedy
Zero calibration
fails (insufficient
range with
ZERO
control).
1. Electrode has Zero error.
2. Sensor is faulty.
Thoroughly rinse electrode in
distilled water and allow to
completely dry in air before
attempting zero calibration.
If instrument does not calibrate
at Zero with electrode
disconnected, then the
instrument is faulty.
Replace sensor.
Standard
calibration fails,
reading is too low
and cannot be
adjusted high
enough.
1. Electrode is not immersed
deeply enough.
2. Electrode may have a
build-up of dirt or oily
material on electrode
wires.
3. Platinum-black coating has
worn off.
4. Standard solution is
inaccurate.
5. Electrode is faulty.
Immerse electrode at least to
the vent hole in the white
plastic cover.
Clean electrode, as per the
instructions detailed in section
11.2.2.
Electrode requires
replatinisation.
Return to the factory, or see
details in section 11.2.3.
Replace standard solution.
Return electrode to factory for
repair or replacement.
Standard
calibration fails,
reading is too high
and cannot be
adjusted low
enough.
1. White protective cover is
not fitted (GK-1 sensor).
2. Standard solution is
inaccurate.
3. Electrode may have a
build-up of conductive
material, such as salt.
4. Electrode is faulty.
The white protective cover
MUST be fitted for correct
readings for GK-1 sensor.
Replace standard solution.
Clean electrode, as per the
instructions detailed in section
11.2.2.
Return electrode to factory for
repair or replacement.
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