Malvern Instruments Mastersizer X, Manual

Page: 45 / 102

Introduction
After reading this chapter you will have a basic understanding of the operating
procedures of the Accessory and in particular:
.
Know the basic operating principle.
.
Know the simple steps involved in using the Accessory when making a
measurement.
What does the Accessory do?
The sole purpose of any sample preparation accessory is to prepare the sample and
then deliver it to the Mastersizer so that it can be measured.
This Accessory is designed for use where the amount of sample available limits
the amount of dispersant that can be used to dilute it or where a small volume of
dispersant is desirable (the sample or dispersant may be toxic or expensive for
example).
The Accessory will quite happily deliver sample to the flow cell in the Mastersizer
with only 50 ml of dispersant in the tank, depending on the length of tubing used.
How does the Accessory do it?
Operating principle
The Accessory is divided into two components:
The Dispersion Unit
À
that houses the stirrer and pump.
The Controller Unit
Á
that controls the pump and stirrer speeds and displays the
stirrer speed.
C H A P T E R 5
Q S S M A L L V O L U M E S A M P L E D I S P E R S I O N U N I T
P a g e 5 . 1