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Appendix: Glossary
Measuring gap
Measuring system
NO2-N
NO3-N
Raw value
Reference sample
Resolution
Sample matrix
Test sample
Ultrapure water (H2O
dist.)
Zero adjustment
TOC
UVT (dissolved)
UVT (total)
56
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.
The proportion of nitrogen coming from nitrite.
The proportion of nitrogen coming from nitrate.
The raw value is determined from the spectrum while taking into
account the data from the zero adjustment. The raw value is displayed
on the right side of the measured value in the measured value display.
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.
Measuring and saving the absorbance spectrum of ultrapure water.
Defines the zero points in the spectrum for all wavelengths. The light
beam is not alleviated at the zero point. The zero point influences the
calculation of the raw value.
Abbreviation for total organic carbon. Total amount of organically
bound carbon in water.
Transmission measurement after turbidity correction
(reference measurement at 550 nm).
Transmission measurement at a certain wavelength.
The UVT-254 value is standardized to 10 mm gap width.
NiCaVis 705 IQ
ba75953e03
05/2017
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