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26
N
OTES ON CONDUCTIVITY PROBES
The service life of a cell can be unlimited, provided that the necessary maintenance is performed
and that it does not break. Some of the most frequent problems and their possible solutions are re-
ported below.
Measurement of conductivity different from the expected value
. Check that the cell used is suit-
able for the measurement range. Check that the cell is not dirty, that there are no air bubbles inside
it. Calibrate again using the appropriate standard.
Slow response or instability
. Check that the cell is not dirty, that there are no traces of oil or air
bubbles inside it. If you work with a black Platinum cell, new regeneration of the electrode could be
necessary.
Cell constant value not accepted
. Check that the standard solutions are in good condition, that the
probe's constant cell value coincides with that selected in the instrument and that the solution tem-
perature is within the range 15…35°C.
