SCHOTT Instruments ProLab 2000, Руководство по эксплуатации

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ProLab 2000 Operation
61 ba75577e03 11/2009
4.7 Conductivity
4.7.1 General information
You can measure the following variables:
z
Conductivity
z
Resistivity
z
Salinity
z
Total dissolved solids (TDS)
The meter provides the following functions:
z
AutoRange (automatic switchover of the measurement range). If a
measuring range is exceeded, AutoRange causes the meter to
automatically change to the next higher measuring range and back
again. Therefore, the instrument always measures in the measuring
range with the highest possible resolution.
z
Stability control to check the stability of the measurement signal.
This ensures the reproducibility of the measuring signal. The display
of the measured parameter flashes until a stable measured value is
available.
Temperature
measurement
The LF413T(-ID), LFOx1400(-ID) and LF313T(-ID) conductivity
measuring cells have an integrated temperature sensor.
CAUTION
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
The RS232 and USB interfaces are not galvanically isolated.
Preparatory activities Perform the following preparatory activities when you want to measure:
Note
The selection of the measuring cell and setting of the cell constant is
made in the conductivity measuring menu (see page 65). The cell
constant to be set must either be taken from the operating manual of
the measuring cell or is printed on the measuring cell.
1 Connect a conductivity measuring cell to the meter.
The conductivity measuring window is displayed.
2 Check whether the Measuring cell and cell constant settings
are suitable for the connected conductivity measuring cell. If
necessary, correct the settings.