Measuring / Operation; Determination Of Measured Values - wtw IQ SENSOR NET NiCaVis 705 IQ NI Operating Manual

NiCaVis 70x IQ NI
ba75988e01 11/2012
4

Measuring / Operation

4.1

Determination of measured values

Physical sensor, series number xxx
Absorbance spectrum
of zero adjustment
Main
sensor
software
Main sensor meas. mode
(algorithm)
Main sensor raw value
User calibration data
of main sensor
Meas. value of main sensor
Fig. 4-1 Determination of measured values
During a measurement, the absorbance spectrum of the test sample is
recorded and set against the stored absorbance spectrum of a zero
adjustment (measurement in ultrapure water). The algorithm for the
calculation depends on the selected application and/or the measuring
location. The resulting raw value can be adjusted to an independent
reference measurement with the aid of a so-called user calibration.
Absorbance spectrum
of measurement
Virtual sensor meas. mode
(algorithm)
Virtual sensor raw value
User calibration data
of virtual sensor
Meas. value of virtual sensor
IQ Sensor Net
Measuring / Operation
Virtual
sensor
software
4 - 1