Frequency Adjustment According To The Conductivity Measurement - Hach POLYMETRON 9125 Operator's Manual

Transmitter 9125 – Conductivity / resistivity measurement
Frequency adjustment according to the conductivity
measurement
Page 58
where :
The dipole Rp, Cp represents the active and reactive
part of the energy necessary to the electron exchange
between the sample and the electrodes.
and :
Cc : the cable capacity
Probe 8317 (K=1)
100 m of cable
10
1
0,1
1E1 1E2
real conductivity (uS/cm)
Auto frequency 62.5 Hz
In the example below 3 measuring ranges are
described :
measuring range 1 μS/cm to 100 μS/cm :
When the measuring frequency is high, the cable
capacity becomes important and induces an error
in the conductivity measurement.
If you use a long cable, use the lowest
frequency possible.
1E3 1E4 1E5
8000 Hz