SCHOTT ProLab 4000, Operating Manual

Page: 139 / 228

ProLab 4000 Conductivity
139 ba75646d03 12/2012
10 Conductivity
10.1 General information
You can measure the following variables:

Conductivity

Specific resistance

Salinity

Total dissolved solids (TDS)
The meter provides the following functions:

AutoRange (automatic selection of the measuring range). If a mea-
suring range is exceeded, AutoRange causes the meter to automat-
ically change to the next higher measuring range and back again.
Therefore, the instrument always measures in the measuring range
with the highest possible resolution.

Stability control to check the stability of the measurement signal.
This ensures the reproducibility of the measuring signal. The back-
ground color is red until the measured value is stable. When the
measured value is stable, the background color switches to green.
Temperature measure-
ment
The LF413T(-ID) and LF313T(-ID) conductivity measuring cells have
an integrated temperature sensor.
10.2 Measuring the conductivity
10.2.1 Preparatory activities
Perform the following preparatory activities when you want to measure:
1 Connect a conductivity measuring cell to the meter.
2 Highlight the channel of the conductivity measuring cell in the
measured value display.
3 If necessary, select the measured parameter with <MODE> .
4 Check whether the setting of the Cell constant is suitable for
the connected conductivity measuring cell. If necessary, cor-
rect the setting.