Glossary - wtw inoLab Level 3 Operating Manual

Lists
Adjusting To manipulate a measuring system so that the relevant
Amperometry Name of a measuring technique. The signal (depending
Asymmetry Designation for the offset potential of a pH electrode. It is
AutoRange Name of the automatic selection of the measuring range.
AutoRead WTW name for a function to check the stability of the
Blank value Designation for the oxygen consumption of the BOD of the
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Glossary

Activity The activity corresponds to the effective concentration.
Due to a reciprocal interaction, the effect of ions, e.g. in
electrochemical processes, deviates from the expected
theoretical value. The activity of ions in small to medium
concentrations (< 1 mol/kg) is less than their
concentration. The relationship between the activity a and
the concentration c is expressed by the equation: a
c .
i
value (e. g. the displayed value) differs as little as possible
from the correct value or a value that is regarded as
correct, or that the difference remains within the tolerance.
on the measured parameter) of the probe is the electric
current. The electrical voltage remains constant.
the measurable potential of a symmetrical electrode, the
membrane of which is immersed in a solution with the pH
of the nominal electrode zero point (WTW electrodes: pH
= 7).
measured value.
dilution water.
The determination of the blank value is required to
calculate the BOD.
= f x
i i