Appendix: Glossary
UV 70x IQ SAC
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10 Appendix: Glossary
Absorbance (Absorp
-
tion)
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.
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.
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 70x IQ SAC 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.
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.
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.
Measured value
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).
The measured value is determined from the raw value taking into
account the data from a user calibration. The measured value is
displayed together with the raw value in the measured value display.
