Delta OHM HD2205.2, Руководство пользователя

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Conductivity measurement
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 probe is connected to the correct input: input
i ,
for a SICRAM type probe,
input
j
for a direct type probe without SICRAM . Check that the cell used is suitable for the
measurement range. Check that the cell is not dirty, that there are no air bubbles inside it. Repeat
the calibration using the proper not contaminated 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 Platinum cell, new platinum-coating of the electrode could be necessary.
Cell constant K value not accepted .
Check that the standard solutions are in good condition, that the probe's constant cell value coin-
cides with that selected in the instrument menu, and that the calibration solution temperature is
within the range 15…35°C.