Glossary - wtw Oxi 7310 Operating Manual

Glossary

D.O. partial pressure
D.O. saturation
OxiCal
Salinity
Salt content
Slope (relative)
Adjusting
AutoRange
Calibration
Measured parameter
Measured value
Molality
Reset
Resolution
Stability control
(AutoRead )
54
14 Glossary
Dissolved oxygen
Pressure caused by the oxygen in a gas mixture or liquid.
Short name for the "relative D.O. saturation".
®
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.
General information
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.
Name of the automatic selection of the measuring range.
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).
The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or D.O. concentration.
The measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and
unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
Restoring the original condition of all settings of a measuring system.
Smallest difference between two measured values that can be dis-
played by a meter.
Function to control the measured value stability.
of seawater corresponds to the relationship
A
Oxi 7310
ba75931e03 12/2011