Hach-Lange POLYMETRON 83xx User Manual - Manual (Page 18)

2 E LECTRODES C ONDUCTIVITY P ROBE - I NSTRUCTION M ANUAL
Page 14 09/2010 621=183=000 Issue B
Programming of the transmitter
REMARK
To obtained detailed information, please
refer to the operating manuals of our
transmitters.
Setting the type of measurement:
9125: Check that both switches of the
conductivity module have been correctly
configured on K (2 electrodes).
Setting the frequency in function with the
conductivity:
K (cm
-1
) Low
conductivity
Average
conductivity
High
conductivity
0.01 0.01…0.1 µS 0.1 µS…20 µS 20 µS…200 µS
0.1 0.1….1 µ S 1 µS…200 µS 200µS…2 mS
1 1 … 10 µ S 10 µS…2 mS 2…20 mS
It is preferable, whenever possible, to operate
in the "Average conductivity" zone (and
therefore to choose the type of sensor well).
• « Low conductivity » zone:
Do not combine a long length of cable with
a high measurement frequency, to avoid
provoking a parallel capacitance
(measurement of conductivity too high).
If one uses a long cable (> 20 m), adjust to
a frequency of 70 Hz.