Cond 3310 IDS
Glossary
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07/2017
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13 Glossary
Conductivity
General information
Conductivity (
ϰ
)
Short form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity.
It is a measured value of the ability of a substance to conduct an electric
current. In water analysis, the electrical conductivity is a dimension for
the ionized substances in a solution.
Reference tempera-
ture
Fixed temperature value to compare temperature-dependent measured
values. For conductivity measurements, the measured value is con-
verted to a conductivity value at a reference temperature of 20 °C or 25
°C.
Salinity
The absolute salinity S
A
of seawater corresponds to the relationship of
the mass of dissolved salts to the mass of the solution (in g/Kg). In prac-
tice, this dimension cannot be measured directly. Therefore, the practi-
cal salinity according to IOT is used for oceanographic monitoring. It is
determined by measuring the electrical conductivity.
Salt content
General designation for the quantity of salt dissolved in water.
Temperature coeffi-
cient
Value of the slope of a linear temperature function.
Temperature compen-
sation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the measured
parameter to be determined, the temperature compensation functions
in different ways. For conductimetric measurements, the measured
value is converted to a defined reference temperature. For potentiomet-
ric measurements, the slope value is adjusted to the temperature of the
test sample but the measured value is not converted.
Resistivity (
ρ
)
Short name for the specific electrolytic resistivity. It corresponds to the
reciprocal value of the electrical conductivity.
Cell constant (c)
Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
α
T
Ref
=
Meas
*
1
1 +
a
(T -
)
*
T
Ref
Resolution
Smallest difference between two measured values that can be dis-
played by a meter.
AutoRange
Name of the automatic selection of the measuring range.
Adjusting
To manipulate a measuring system so that the relevant 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.
Summary of Contents for Cond 3310 IDS
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