1290 Infinity II High-Speed Pumps User Manual 69
3Using the Pump
Setting up the Pump with the Instrument Control Interface
Prepare Pump Dialog
Table 9 Prepare Pump dialog
Parameter Limits Description
Purge Time: 0 – 100.00 min
in steps of 0.01.
Flow:
0.000 – 5.000 mL/min
for each channel, in
steps of 0.001
Setup and activation of Purge parameters. The automatic purge valve can
be used for purging the system. The process has been automated for ease
of use.
•Off: Turns off the purge.
•On: The device is purged.
•Purge Flow, Time and Composition during purge have to be defined.
As soon as the duration time of the purge ends, the module automatically
switches to analytical conditions again.
Prime Select On to start priming, Off to turn priming off.
The Prime function is helpful if air has entered the pump heads. The module
draws solvent at high speed with all four pump drives simultaneously, and
dispenses it against the waste position of the automatic purge valve. This is
done 20 times, before the process comes to an end. It should only be used
when purging is not successful in removing stuck air bubbles from the
pump head, and under no circumstances to fill the solvent lines when they
are completely empty.
Conditioning at least 200 bar
(> 500 bar is better).
Use this function if you see excessive pressure or composition ripple, and
you are sure that the solvent type (aqueous/organic or specific solvent/sol-
vent mix) is correctly set, and there is no evidence of leakage in the pump.
Conditioning may be necessary if the pump contains air, for example, after
running out of solvent, after a long period of standby or after service or
repair.
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