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Hardware features
The control unit contains most of the control electronics for the dispersion unit.
Power and communications cables are connected to the control unit. A control
cable is connected from the front of the control unit to the front of the cell unit.
The cell unit contains the cell, well, pump and drain facilities. The cell unit is
designed to circulate the sample and dispersant mixture and pass it through the
analysing laser beam of the optical bench.
The well in the cell unit is where sample to be measured is added. The sample well
and connecting pipes have a capacity of less than 20ml.
The dispersant for suspending the sample and flushing the system is injected into
this port using a syringe. Always use a syringe with a maximum capacity of 20 to
25ml.
Once the measurement is complete (or during a flush routine to clean the system)
an internal drain valve can be operated. The contents of the cell will drain through
the drain port into the drain beaker.
If the end of the drain pipe is under the surface of the waste liquid, the back pres-
sure created may prevent the cell from draining correctly. Typically ensure that the
end of the tube is approximately 3cm below the rim of the beaker (slide the beaker
holder until the correct length is achieved).
Hydro 2000µP
Warning!
The PSU used on the Hydro 2000µP is not designed for operation in wet
conditions. Do not place it in areas that are prone to spillages.
Warning!
Only use the power supply and cables supplied by Malvern Instruments.
Control unit
Cell unit
Sample well
Dispersant input/syringe
Drain beaker
Chapter 2
Page 2-5
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