Xylem wtw NitraVis 705 IQ, Руководство по эксплуатации

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Measurement / Operation
NitraVis 70x IQ
22 ba75951e03 05/2017
4.2 Measurement operation
Measured value
display
Fig. 4-2 NitraVis 70x IQ In the measured value display
In the measured value display
Factors affecting the
measured values
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 sample 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)
4.3 Calibration
4.3.1 Overview
In the delivery condition, the sensor is precalibrated and ready to measure (see
section 3.4.1).
There are two types of calibration that are included into the calculation of the
CAUTION
Never look into the measuring window or put objects into the
measuring 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.
Raw value,
identifiable by #
Measured value