Chapter 2 Hardware features
Page 2-2 MAN 0385
2
How the dispersion unit works
This is the Hydro 2000G:
ill 4911
The dispersion unit comprises a tank that holds one litre of sample/dispersant
liquid. A stirrer
, controlled from the software, agitates the sample and stops it
from settling or separating out. The pump
, controlled from the software, forces
the sample from the TO CELL port
of the dispersion unit to the flow cell
located in the optical bench, via the sample tubing. The pump and stirrer can be
independently controlled.
The sample is pumped through the flow cell and then returns to the tank via the
sample tubing and the FROM CELL port
.
An ultrasonic probe
is provided to aid sample dispersion and can also be used to
remove bubbles from the flow path.
The dispersion unit contains two fluid handling valves controlled from the soft-
ware:
A motor-driven drain valve that allows the tank to be drained.
A dispersant valve that opens to allow clean dispersant into the tank.
The operation of the Hydro 2000S is virtually identical, except that it has a com-
bined pump/stirrer mechanism and a smaller (150ml) tank capacity.
2, 3
5
4
32 1 67
MAN0385-1.0 Hydro 2000G-S.book Page 2 Friday, March 16, 2007 4:02 PM
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