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Conductivity and Salinity Troubleshooting, continued...
Standard calibration
fails, and k factor
is less than 0.075,
0.75 or 7.5,
(depending on k
factor of sensor).
1.
White protective cover is
not fitted or upside down.
2.
Standard solution is
inaccurate.
3.
Sensor may have a build-up
of conductive material,
such as salt.
4.
Sensor is faulty.
5.
Faulty instrument.
6.
k-factor incorrectly set if
using k=0.1 or k=10 sensor.
The white protective cover
MUST be fitted for correct
readings. The vent hole must
be towards the cable end of the
sensor.
Replace standard solution.
Clean sensor, as per the
instructions detailed in section
18.1.
Return sensor to factory for
repair or replacement.
Return to factory for repair.
Set the correct k-factor, as per
section 13.
Inaccurate readings,
even when
calibration is
successful.
1.
Sensor may have a build-up
of dirt or oily material on
sensor wires.
2.
Platinum-black coating has
worn off.
Clean sensor, as per the
instructions detailed in section
18.1.
Sensor requires replatinisation.
Return to the factory, or see
details in section 18.2.
Readings drift.
1.
Sensor may have a build-up
of dirt or oily material on
sensor wires.
Clean sensor, as per the
instructions detailed in section
18.1.
Readings are low or
near zero.
1.
Sensor may have a build-up
of dirt or oily material on
sensor wires.
2.
Sensor is not immersed
deeply enough.
3.
Sensor is faulty.
4.
Faulty instrument.
5.
k-factor incorrectly set if
using k=0.1 or k=10 sensor.
Clean sensor, as per the
instructions detailed in section
18.1.
Immerse sensor at least to the
vent hole in the white plastic
cover.
Return sensor to factory for
repair or replacement.
Return to factory for repair.
Set the correct k-factor, as per
section 13.