Metrohm NIRS XDS Process Analyzer – MicroBundle - Manual (Page 8)

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1
Introduction
The XDS Process Analytics Microbundle Multiplexer Instrument uses Near Infrared (NIR) energy to
determine chemical and physical characteristics of the sample. The sample is illuminated with white
light, and the signal returning is broken down into visible and NIR wavelengths for spectroscopic
analysis.
Vision Software® is used for this analysis. Vision® has a complete suite of analysis methods for both
quantitative measurement, and for qualitative analysis. The quantitative tools permit measurement of
specific constituents (analytes) within a given product. The qualitative tools permit identification (ID)
of product, as well as “qualification” to determine the suitability of that product, as compared to
previously scanned samples.
The XDS Process Analytics Instrument is able to distinguish between very small absorbance
differences at each data interval (0.5nm). By scanning samples of known constituent values, or
known qualitative characteristics, the user may develop a very precise measurement calibration, as
well as a library of known products, or good quality. The Analyzer is used to scan new product, and
compare the spectra to those known samples. From this analysis, the software provides accurate
predictions of analyte values, product identification, and acceptance of good quality product, based
upon developed calibration models.
1.1 Enclosure Styles
The Basic XDS Process Analytics Instrument, shown at right, is
suitable for normal factory environments where operating
temperatures do not exceed 90°F (32°C). It is rated NEMA 4X.
For warmer environments, Vortec cooling (40°C) or air-
conditioning (51°C) are available.
This unit is shown with an Interactance Reflectance probe,
suitable for use in dryers and similar industrial applications. It
may also be used with Transmission Pair, or Interactance
Immersion Probe. Both are excellent for liquids, and each has
advantages in specific applications. Probe styles are described in
section 1.2.
A multiplexed version of this unit allows multiple channels, for
process lines where one instrument may sample multiple
locations.