Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 82

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
3. Purge the pump head from Chromeleon or from the pump display.
To purge the pump heads from Chromeleon
a) In Chromeleon, open the Commands dialog box for the NC pump.
The properties and commands for purging the NC pump appear under
PumpModule > NC_Pump.
b) Select PurgeWhat and then select the pump head that you want to purge: LeftBlock,
RightBlock, or BothBlocks.
c) Start the purge cycle. To do so, set Purge to On.
The pump head is purged for the time specified under Purge Time. The standard
setting is 30 minutes. When the PurgeTime has elapsed, Purge is automatically reset
to Off. You can stop purging also manually by setting Purge to Off.
Observe the following information about the purge time:
♦ When refreshing solvents (same solvents)
If you refreshed the solvents in the reservoirs, you should purge the pump head to
make sure that the fresh solvent is available throughout the system. The purge time
depends on the flow meter installed:
♦ ProFlow flow meter: Purge for about 5 minutes.
♦ Classic flow meter: Purge for about 10 minutes.
♦ When changing solvents (to a different type)
If you want to change solvents, purge the pump head to make sure that the previous
solvent is completely removed from the pump heads and solvent supply line filters
of the flow meter. The purge time depends on the flow meter installed:
♦ ProFlow flow meter: Purge for about 15 minutes.
♦ Classic flow meter: Purge for a minimum of 30 minutes.
♦ Removing air bubbles
When removing air bubbles (without changing the solvent), you can stop the purge
cycle manually when no more air bubbles appear at the purge outlet. As an
alternative, you can reduce the PurgeTime as appropriate.
To purge the pump heads from the pump display
a) On the pump display, select the Control menu for the NC pump and select Purge
(→ page 101).
b) Choose Select and Execute to open the Purge screen.
Page 74 Operating Instructions