User`s guide

4-7
Operation 4
Setting Up the Pump
Pump A Compressibility
This data is used to calculate the flow rate compen-
sation for the compressibility of the solvent. The
minimum value is 0 and the maximum value is
2000 Mbar
-1
. Compressibility values for commonly
used solvents at atmospheric pressure are listed in
Appendix E. The values for the most common
solvents are:
# The default value is 46 for water.
• Key in the value for the solvent being used with
pump A and press Enter.
Pump A Head Size
This parameter is the size of the pump head fitted
to the pump. The pump head size is marked on the
face of the pump head. Possible values are 5, 10,
25, 50, 100 and 200.
# The default value is 200.
• Key in the value for the pump head size on
pump A and press Enter.
The three parameters for pump A are now entered.
Press the Info soft key to display the operating time
for the pump head. This time can be reset to zero
by pressing the Reset soft key. This should be reset
every time the pump head has routine maintenance
or when a new pump head is installed. Pressing
Ok returns to the pump head size display.
Press the Next soft key to return to the Setup pump
hardware menu to setup the parameters for other
pumps in the system. Press the Quit soft key to
return to the first Ready-to-Run screen. The next
menu to program is the Input/Output parameter
setup.
Inlet Pressure
The Inlet Pressure (P0) for liquefied gas is the
pressure at the inlet of the pump head of the 305.
For example, when using carbon dioxide at a
temperature of 22°C, the value should be defined
as 6 MPa. The minimum value is 0 for solvents used
in Liquid Chromatography and the maximum
allowed value is 10 MPa. The default value is 0 MPa.
This menu will not appear if
there is no manometric module
connected to the system.
Solvent X
0
(Mbar
-1
)
Water 46
Methanol 123
Acetonitrile 99