Chapter 2 Hardware features
Page 2-8 MAN 0385
Tank fill rate
This adjuster alters an internal pressure regulator that will control the rate at which
the tank is filled with dispersant. This is always set by the installation engineer but
if it’s found that the dispersant pressure has changed (one sign is that the tank takes
a long time to fill), alter this adjuster so that a fill tank cycle takes about 20 seconds.
“From cell” pipe
This is the sample return port where the sample/dispersant returns to the disper-
sion unit from the flow cell in the optical bench.
“To cell” pipe
This is the sample-out port where sample/dispersant leaves the dispersion unit for
the flow cell.
Mains power supply
The mains power supply is a standard IEC socket that supplies mains power to the
dispersion unit. It also houses the dispersion unit’s fuses and its on/off switch.
Accessory comms “in” connector
The communications cable from the optical bench or from another dispersion unit
connects here.
Accessory comms “out” connector
If more than one dispersion unit is connected to the system and this is the first dis-
persion unit in-line then a communication cable will be connected from this con-
nector to the accessory comms - “in” connector of the second dispersion unit.
The termination plug supplied with the optical bench must be fitted here if this is
the only dispersion unit connected or it is the last dispersion unit in the line.
Auxiliary connector
Not used.
Manual drain
The manual drain button can be pressed to drain the tank (the dispersion unit must
be powered up first). Users may wish to do this if, for example, they need to drain
the dispersion unit without having to turn on the control software. Pressing and
holding the button will open the drain valve. Releasing the button will close the
drain valve.
MAN0385-1.0 Hydro 2000G-S.book Page 8 Friday, March 16, 2007 4:02 PM