Metrohm tiamo 2.2 (ProcessLab) - Manual (Page 1056)

5.6 Commands ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
1040 ￭￭￭￭￭￭￭￭ tiamo 2.2 (ProcessLab)
Range -20.0 ... 150.0 °C
Default value 25.0 °C
5.6.5.6 CAL LOOP Conc
5.6.5.6.1 CAL LOOP Conc - Overview
Dialog window: Method ▶ CAL LOOP Conc ▶ Properties... ▶ CAL LOOP Conc - 'Com-
mand name'
Loop command for the calibration of ion-selective electrodes, which is
used together with the command CAL MEAS Conc.
Appearance
The command has the following appearance:
Parameters
The parameters for the command CAL LOOP Conc are configured in the
following dialog window:
￭ CAL LOOP Conc - Properties
Principle
For calibrating ion-selective electrodes (ISE), a linear correlation of the meas-
ured potential U
i
and the logarithm of the sought ion concentration c
i
cannot
always be assumed. In ion measurements, interfering ions have an influence
on the measurement and that is why this effect is perceptible by a flattening
of the curve, especially in low concentration ranges.