Process:
Switch on the instrument and allow it to warm up for 2-5 minutes.
Measure a conductance, Gs, of the standard KCl solution through putting meter switch to READ position.
Remove the KCl solution from the beaker; wash the conductivity cell properly with distilled water. Let's Take the unknown solution in the beaker and measure its conductance, Gu, in the manner as for standard KCl solution.
Calculate the cell constant, from the conductivity values and conductance of the standard,
K cell = Conductivity (specific conduc tan ce) /Observed conduc tan ce of the standard
= (κ s/Gs)cm -1
Calculate the conductivity (specific conductance) of the unknown solution = cell constant × observed conductance
κ u = K cell Gu
For titration work, the value of cell constant, Kcell is not required to be calculated, since the cell constant will remain unchanged during the course of any given titration.