Conductivity; Basic Rules For Conductivity - Swann Chematest 35 Operator's Manual

Chematest 35

Conductivity

6.
6.1.
Calibration and
verification
Temperature
equalization
Change from
high to low
conductivity
Storage
22
Conductivity

Basic Rules for Conductivity

The conductivity sensor of the Chematest 35 is already calibrated
at the factory and the cell constant is stored in the sensor. Since the
conductivity sensor does not change its properties significantly over
time, a periodic recalibration is usually not necessary.
Instead of recalibration, Swan recommends to perform a periodic
verification as described in section
Sensor, p. 32. If a recalibration is necessary for regulatory reasons,
proceed according to
For reliable measurement results, the sensor and the sample water
must have the same temperature. The process of temperature
equalization can take up to five minutes, depending on the tem-
perature difference. To accelerate this process, it is helpful to stir
the sample occasionally with the sensor.
If you change from a sample with a very high conductivity to a sam-
ple with a very low conductivity, rinse the sensor thoroughly with the
low-conductivity sample before carrying out the measurement.
If necessary, also unscrew the protection sleeve as described in
Cleaning the Conductivity Sensor, p. 33
external threads with the low-conductivity sample. Screw the pro-
tection sleeve back on before carrying out the measurement.
Rinse the conductivity sensor with clean water after use.
If it is heavily contaminated, clean it according to
ductivity Sensor, p.
Store the conductivity sensor dry.
Verification of the Conductivity
Calibration of the Conductivity Sensor, p.
33.
and rinse the internal and
Cleaning the Con-
A-96.730.121 / 160920
31.