wtw inoLab Multi 9620 IDS Operating Manual page 139

®
inoLab Multi 9620 IDS
Salt content
Temperature
coefficient
Temperature
compensation
Resistivity (ρ)
Cell constant (c)
OxiCal
Salinity
Salt content
?DO partial pressure
D.O. saturation
Slope (relative)
Resolution
AutoRange
Adjusting
ba77173e04 12/2017
General designation for the quantity of salt dissolved in water.
Value of the slope
=
Meas *
T
Ref
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.
Short name for the specific electrolytic resistance. It corresponds to the
reciprocal value of the electrical conductivity.
Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
Dissolved oxygen
®
WTW name for a procedure to calibrate D.O. measuring systems in
water vapor saturated air.
The absolute salinity S
of the mass of dissolved salts to the mass of the solution (in g/Kg). In
practice, this dimension cannot be measured directly. Therefore, the
practical salinity according to IOT is used for oceanographic monitor-
ing. It is determined by measuring the electrical conductivity.
General designation for the quantity of salt dissolved in water.
Pressure caused by the oxygen in a gas mixture or liquid.
Short name for the relative D.O. saturation.
Designation used by WTW in the D.O. measuring technique. It
expresses the relation of the slope value to the value of a theoretical
reference sensor of the same construction type.
General topics
Smallest difference between two measured values that can be dis-
played by a meter.
Name of the automatic selection of the measuring range.
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.
α
of a linear temperature function.
1
(T - T )
1 + a
*
Ref
of seawater corresponds to the relationship
A
Glossary
139