Malvern Instruments Spraytec, User Manual

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Average scatter data – the Spraytec calculates the average scattering
pattern associated with the records selected for averaging. The average size
distribution is then calculated from this average scattering data set. This is
the default and recommended option.
Average size distribution – the average distribution is based on the size
distribution data reported for each of the records selected for averaging.
This is done by averaging the percentage reported in each size band to
produce the average distribution. This option is provided to provide
compatibility with older laser diffraction systems.
Concentration-weighted average – this weights the calculated average
size distribution for the volume concentration measured for each record in
the range. This allows for fluctuations in the spray concentration during the
measurement. It is enabled by default.
'
N o t e
. Disabling Concentration-weighted average causes the average to be
calculated based on the assumption that each record is equally important
in determining the final result. Only do this if the spray concentration
does not change significantly across the range of records selected.
.
Keep Average scatter data selected and select the Time-based average
check box. Click the Configure button to open the Time-based average
dialogue shown below.
C H A P T E R 5
S p r a y t e c
P a g e 5 . 2 8
M A N 0 3 6 8