YSI MultiLab 4010P-1 - Manual (Page 97)

MultiLab 4010-1 Glossary
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Dissolved oxygen
General information
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
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.
Salt content General designation for the quantity of salt dissolved in water.
Temperature
coefficient
Value of the slope of a linear temperature function.
Temperature
compensation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the mea-
sured 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
potentiometric measurements, the slope value is adjusted to the tem-
perature of the test sample but the measured value is not converted.
α
T
Ref
=
Meas*
1
1 + a (T - ) * T
Ref
D.O. % saturation Short name for the "relative D.O. saturation".
Relation of the D.O. partial pressure in the test sample to the D.O. par-
tial 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.
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
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.
Salt content General designation for the quantity of salt dissolved in water.
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.
AutoRange Name of the automatic selection of the measuring range.
Calibration Comparing the value from a measuring system (e. g. the displayed
value) to the correct value or a value that is regarded as correct.
Often, this expression is also used when the measuring system is
adjusted at the same time (see adjusting).