Malvern Instruments Spraytec, User Manual

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.
Use the Derived parameters dialogue to specify which parameters are
relevant to the measurement. Use the Delete button to remove any param-
eters which are not needed, then the Add and Modify buttons to set up the
list.
The example above shows the recommended parameters for a nasal spray
measurement. Use the
Delete button to remove any parameters which are
not needed, and the Add and Modify buttons to set up the list. When the
parameters are listed as shown above click Next .
.
The Averaging dialogue appears:
The Options section determines how average size distributions are
calculated. The choices are:
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
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