P 2.1L user manual V6840, version
3.
5
Operation
25
Operation
Switching on the Pump
Prerequisite
Liquid container is sufficiently filled.
Piston backflushing is connected.
Washing container is sufficiently filled.
Component defect
Damage to the pump head in case it runs dry.
Ensure that liquid runs through pump head and piston backflushing.
Result
The pump is now ready for operation. If the test fails an error message will
be displayed. Contact the Technical Support of the manufacturer if the error
occurs several times.
Next steps
Forestall pressure fluctuations by letting the pump run for 1 h.
Flushing the Pump
To flush the pump, insert the inlet hoses into the storage containers and
start the pump with an intermediate flow rate. As the pump is self-priming,
the venting screw can be open. In case necessary, draw liquid through the
dry feed hoses up to the pump head with the provided syringe. If you are
working without the pump head inlet, pay attention that both feed hoses
are filled with solvent.
Column defect
Damage to the column due to de-aeration.
Open the venting screw.
Remove the column.
When is flushing
required?
Flush the pump in the following cases:
At initial startup to eliminate air bubbles in hoses and capillaries.
When changing solvents.
After using buffer solutions to eliminate salt residues.
Before turning off, if you do not plan to restart the device within shortly.
Use the solvent for flushing that is to be used in the subsequent application.
Note:
If you used a buffer solution, pay attention to choosing a solvent for
flushing in which the buffer solution is soluble.
Procedure
Process
Figure
1. Switch on the pump at the
power switch
1
on the rear
side.
2. Wait until the pump has com-
pleted the self-test.
3. If the self-test has been success-
fully completed, the LED on the
right lights up green.
Fig. 28
Power switch
1
