3
Operation
14
Pump P-960
User Manual 18-1172-73 Edition AA
3 Operation
3.1
General
Pump P-960 switches on automatically when the chromatography
system is switched on.
Pump P-960 is controlled from a PC running UNICORN version 4.12
or higher. It cannot be used as a stand-alone instrument. Control of the
pump can be achieved automatically from a method, or manually via
the functions available in UNICORN.
3.2
User interface
Pump P-960 is equipped with a green LED on the front panel. The LED
indicates the following:
•
Flashing light indicates that the power is on.
•
Steady light indicates that UniNet-2 is connected.
3.3
Starting and stopping the pump
3.3.1
Preparation before starting the pump
1
Make sure that all liquid used in the pump is filtered.
2
Place the liquid vessels on the workbench or on top of the system
then use the flow restrictor, see section 2.6 Connecting the flow
restrictor).
Do not close the vessels off completely. The pump might not work
if a vessel is sealed, or if it is placed too far below the pump inlet.
3
Check that there is enough liquid present for the run, and that the
ends of the inlet tubings are fully immersed. If no solvent filter is
used, fasten the tubings to keep the tubings ends at the bottom of
the liquid vessel. To change liquid, see section 3.8 Changing liquid.
CAUTION!
Before a run, always make sure that there is a sufficient
supply of liquid in the reservoirs. Avoid pumping without liquid, since
this might affect the lifetime of the sealing parts in the pump.
18117273aa.book Page 14 Thursday, July 3, 2003 5:13 PM