Malvern Hydro 2000uP User Manual page 30

Chapter 3
the case of this dispersion unit there would be an entry for Hydro 2000µP (A) and
Hydro 2000µP (B). If using just one dispersion unit, select the "A" option.

This dispersion unit is supplied in two versions, with ultrasonics and without ultra-
sonics. Use this pull down list to select the model in use.
If the user tries to run an SOP that has been defined for an dispersion unit with
ultrasonics on an dispersion unit without that option, a message is displayed, telling
them to connect the correct dispersion unit.
Sampler Settings dialogue
The Sampler Settings dialogue is shown below:
Its features are:

The pump speed is altered by moving the slider or entering the required speed in
the RPM box to the right of the slider.
Selecting the Advanced button displays the Vari-flow options. Some materials
such as metal flakes have been found to form structures when they are circulated
through the cell at normal pump speeds. These structures give rise to a secondary
diffraction pattern that is incorrectly interpreted as a small peak at 1000 microns.
Vari-flow allows these materials to be dispersed in the well in the normal way and
then the pump is briefly turned off or reduced before measurement of the sample.
When the pump is turned off, the structures in the sample are randomised and the
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Sample handling unit options
1
2
Pump speed
Software features
ill 7775
MAN 0389