wtw inoLab Multi 9310 IDS Operating Manual page 109

®
inoLab Multi 9310 IDS
Salinity
Salt content
Temperature coeffi-
cient
Temperature compen-
sation
D.O. partial pressure
D.O. saturation
OxiCal
Salinity
Salt content
Slope (relative)
ba75937e10 08/2021
The absolute salinity S
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.
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.
Dissolved oxygen
Pressure caused by the oxygen in a gas mixture or liquid.
Short name for the relative D.O. saturation.
Relation of the D.O. partial pressure in the test sample to the D.O.
partial pressure of air at the current air pressure.
Example: 100% means that the test sample and the ambient air have
the same D.O. partial pressure – air and test sample are balanced.
®
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.
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.
of seawater corresponds to the relationship of
A
α
of a linear temperature function.
1
(T - T )
1 + a
*
Ref
of seawater corresponds to the relationship
A
Glossary
109