Glossary - wtw inoLab pH/Cond Level 1 Operating Manual

Lists
Asymmetry
AutoRange
AutoRead
Buffer solution
Calibration,
conductivity
Cell constant
Conductivity
Control standard
solution
Diaphragm
136

Glossary

Zero point of a pH electrode.
Automatic selection of the measuring range.
Monitors the electrode drift and releases the measured val-
ue only after the stability criterion has been reached. In this
way, this procedure ensures the highest degree of precision
and reproducibility.
Stable solution with a precisely known pH value.
The cell constant is determined through calibration. To do
so, the conductivity measuring cell is immersed into a series
of aqueous salt solutions with exactly known electric con-
ductivity. The relevant conductivity values are determined
using the conductivity measuring instrument.
Linear factor describing the geometrical dimensions of a
measuring cell and its electrodes.
l With the value of the cell constant you can roughly descri-
be the application range of a conductivity measuring cell.
l The cell constant is determined through calibration in one
or several calibration solutions.
The conductivity value is a sum parameter for the ion con-
centration of a test sample.
Solution with a known conductivity to determine or check the
conductivity.
Contact point between the reference electrolytic solution
and the sample.