Xylem MULTI 3500i HANDHELD MULTIPARAMETER METERS - Manual (Page 60)

Operation Multi 3500i
58
4.7 Conductivity
4.7.1 General information
You can measure the following variables:
z Conductivity
z Specific resistance
z Salinity
z Total dissolved solids (TDS)
The measuring instrument is supplied with the following functions:
z AutoRange (automatic switchover of the measurement range). If a
measuring range is exceeded, AutoRange causes the measuring in-
strument 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 AutoRead drift control) for checking the stability of the measurement
signal. This ensures the reproducibility of the measuring signal. The
display of the measured variable flashes until a stable measured val-
ue is available.
Temperature
measurement
The TetraCon 325, ConOx, LR 325/01 and LR 325/001 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 interface is 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 section 4.7.4). 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 measuring instru-
ment.
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.