Pfeuffer Granolyser User Manual

Function
Revision 3 | Granolyser / Granolyser HL operating instructions
19 | 46
6.2 Sequence of functions
The
GRANOLYSER is an NIR analyzer for whole grain samples such as various cereal types, leguminous crops
and oil seeds. Switch on the
GRANOLYSER using the main switch (position I). The operating system starts.
Following the warmup phase, fill the sample contained in the supplied 600 ml measuring beaker into the
filling funnel. Select a product on the display and start the measuring procedure. The electric motor
connected to the conveyor wheel is started.
A halogen lamp with controlled light intensity illuminates the sample. The
GRANOLYSER uses the reflected
constituents in the range from 950 to 1540 nm (NIR) to detect the presence of a sample.
The conveyor wheel ensures the most homogeneous possible density during the measurement. By even
rotation, the material is continuously transported past the detector, and the reflection from the sample
in the NIR range is measured. The spectra recorded by the detector are processed in the evaluation
electronics. The measurement result is shown on the display.
In the apparatus G
RANOLYSER HL, the bulk density [kg/hl] (hectoliter weight) is also determined by means
of an integrated weighing instrument for all products
For precise information about operation, refer to chapter 7.
6.3 Reference methods for calibration
Pfeuffer GmbH uses the following reference measures, amongst others:
Parameters
Reference method
Moisture
Dry cabinet (cereal, maize, leguminous crops and oil seeds)
Protein
Kjeldahl or Dumas process
Conversion factors 5.7 (wheat, durum, spelt, rye) or
6.25 (barley, triticale, oats, maize, soya beans, peas)
Oil
Soxhlet extraction or NMR – nuclear magnetic resonance spectroscopy
Gluten
Mechanical process for determining the wet gluten
Sedimentation index
Zeleny test
Starch
Polarimetric determination
Bulk density
(hectoliter weight)
EEC
4
bulk density
NOTICE
DIN EN ISO 7971-3 (Cereals – Determination of bulk density, Part 3 – Routine method)
specifies various equations for the analysis, and these are applied by Pfeuffer GmbH.
For durum, triticale and spelt the wheat equation is used.
The bulk density (hectoliter weight) result of the G
RANOLYSER HL
• is based on the actual moisture result of the sample, and is not adjusted to a lower
moisture value (9 % to 14 %).
• does not equal the EEC bulk density according to directive 71/347/EWG and may
not be used in legal transactions.
4
EEC = European Economic Community

Pfeuffer Granolyser Specifications

General

Brand	Pfeuffer
Model	Granolyser
Category	Measuring Instruments
Language	English