YSI NiCaVis 701 IQ NI - Manual (Page 61)

NiCaVis 70x IQ NI
Appendix: Glossary
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10 Appendix: Glossary
Resolution Smallest difference between two measured values that can be
displayed by a meter.
BSB, BOD Abbreviation for the "Biochemical Oxygen Demand". The biochemical
oxygen demand of the amount of oxygen required by microorganisms
in order to aerobically decompose organic substances in an aqueous
solution.
CSB, COD Abbreviation for the "Chemical Oxygen Demand". The chemical oxy-
gen demand is the equivalent amount of oxygen that is required for
the complete oxidation of the organic (major part) and anorganic
(minor part) substances in an aqueous solution.
DOC Abbreviation for dissolved organic carbon. Concentration of
dissolved, organically bound carbon in water.
Absorbance
(Absorption)
Attenuation of the light beam when it penetrates the sample.
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.
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).
Calibration value pair Value pair consisting of the raw value measured by the UV sensor,
and a reference value measured e. g. by a laboratory determination.
The calibration value pairs are the result of the user calibration.
Concentration
Mass or amount of a dissolved substance per volume, e. g. in g/L or
mol/L.
Measuring system The measuring system comprises all the devices used for measuring,
e. g. measuring instrument and sensor. In addition, there is the cable
and possibly an amplifier, terminal strip and armature.
Measured parameter The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or D.O. concentration.
Measured parameter
(correlated)
With the measuring method used, a correlated measured parameter
is not determined directly. A correlated measured parameter can,
however, be derived from a determinable measured parameter. The
precondition for this is that there is a reproducible interrelationship
(correlation) between the determinable and correlated measured
parameter.
Test sample Designation of the test sample ready to be measured.