Appendix: Glossary - wtw NiCaVis 705 IQ TS Operating Manual

Appendix: Glossary

Absorbance (Absorp-
tion)
Adjusting
Calibration
Calibration value pair
Concentration
Measured parameter
Measured value
Measuring gap
Measuring system
Reference sample
Resolution
Sample matrix
Test sample
Ultrapure water (H2O
dist.)
56
10 Appendix: Glossary
Attenuation of the light beam when it penetrates the sample.
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.
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).
Value pair consisting of the raw value measured by the
NiCaVis 705 IQ TS sensor, and a reference value measured e.g. by a
laboratory determination. The calibration value pairs are the result of
the user calibration.
Mass or amount of a dissolved substance per volume, e. g. in g/L or
mol/L.
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).
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.
The measuring gap is between the two measurement windows. In the
measuring gap, the light beam penetrates the test sample.
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 box and armature.
Random sample of the test sample for comparative chemical-analyt-
ical laboratory analyses intended for user calibration.
Smallest difference between two measured values that can be
displayed by a meter.
Composition of the test sample of different individual substances.
Designation of the test sample ready to be measured.
Ultrapure water is distilled or deionized water suitable for analysis
purposes.
NiCaVis 705 IQ TS
ba77189e01 05/2017