Measuring Operation - wtw IQ SENSOR NET NiCaVis 705 IQ NI Operating Manual

Measuring / Operation
Measured value display
Factors affecting the
measured value
4 - 2
4.2

Measuring operation

CAUTION
Never look into the measuring window or put objects into the measur-
ing window during operation! The emitted UV radiation can damage the
eyes!
In the case of authorized use, inadvertent eye contact with the light
beam is not possible.
Fig. 4-2 NiCaVis 70x IQ NI in the measured value display with main sensor and vir
tual sensor
The following factors can adversely affect the measurement quality:
 The measuring gap is not sufficiently filled and flowed through by the
test sample
 Foreign bodies and air bubbles are in the measuring gap
 Extraordinary changes (interferences) of the sample matrix
 Contaminated measurement windows due to difficult waste water
matrix
 Damaged measuring windows
 Lacking quality of the zero adjustment, e. g. due to contaminated
ultrapure water
 The user calibration is not representative (or erroneous)
NiCaVis 70x IQ NI
Raw value,
identifiable by #
Measured value
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ba75988e01 11/2012