Appendix: Glossary
ColorVis 705 IQ
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06/2021
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.
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 ColorVis 705 IQ
sensor, and a reference value measured e.g. by a laboratory determina
-
tion. 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.
Measured parameter
The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or D.O. concentration.
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.
Measuring gap
The measuring gap is between the two measurement windows. In the
measuring gap, the light beam penetrates the test sample.
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.
Reference sample
Random sample of the test sample for comparative chemical-analytical
laboratory analyses intended for user calibration.
Resolution
Smallest difference between two measured values that can be displayed
by a meter.
Sample matrix
Composition of the test sample of different individual substances.
Test sample
Designation of the test sample ready to be measured.
Ultrapure water (H2O
dist.)
Ultrapure water is distilled or deionized water suitable for analysis
purposes.