Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 84

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
To purge the flow meter 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.
c) On the Purge screen, select Start for the flow meter.
Note the following:
♦ The flow meter is purged for the time specified under Purge Time. The Purge
Time is set on the Preferences menu (→ page 102); the standard setting is 30
minutes. When the specified Purge Time has elapsed, the purge cycle is
automatically stopped. You can stop the purge cycle also manually by selecting
Stop on the Purge screen.
♦ To make sure that any air bubbles that might be trapped in the NC pump are
completely removed, observe the information about the purge time further up on
this page.
♦ While the flow meter is being purged, the pressure at the flow meter outlet is
monitored internally. However, the column pressure reading does not reflect the
actual column pressure. As a result, an overpressure condition can occur even
thought the column pressure reading is still 0 bar. In this case, remove any
components from the flow meter outlet that can cause a pressure build-up.
4.5.3.2 Purging the Loading Pump
1. Attach a piece of silicone tubing to the purge outlet on the purge unit. Silicone tubing
is provided in the accessory kit of the module.
2. Attach the free end of the tube to a plastic syringe.
A syringe is provided in the accessory kit of the module.
3. Open the purge valve (turn the screw one turn counterclockwise).
4. To ensure efficient purging verify that either an autosampler is connected to the
loading pump outlet or the outlet is capped.
5. Purge the pump from Chromeleon or from the pump display.
Page 76
Purge screw
Purge outlet
Fig. 34: Purge valve on the purge unit
Operating Instructions