Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 83

c) On the Purge screen, select Start for the pump head that you want to purge (or for
both).
The pump head 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.
Observe the information for the purge time further up in this section (→ page 74).
4. Close the purge valve. Turn the purge screw clockwise with your hand to the stop.
5. Purge the flow meter (→ section 4.5.3.1.2).
4.5.3.1.2 Purging the Flow Meter
To make sure that air bubbles and, if applicable, previous solvents are completely removed
from the NC pump, you have to purge the flow meter after you have purged the pump heads.
1. Close the purge valves if they are not yet closed.
Turn the purge screw clockwise with your hand to the stop.
2. Connect the nanoViper capillary (0.25 x 155 mm I.D. x L, MP35N) from the
accessories kit of the module to the flow meter outlet. The other end of the capillary
must remain open.
3. Purge the flow meter from Chromeleon or from the pump display.
To purge the flow meter from Chromeleon
a) In Chromeleon, open the Commands dialog box for the NC pump.
The properties and commands for purging the flow meter appear under
PumpModule > NC_Pump.
b) Select PurgeWhat and then select Flow Meter.
c) Start the purge cycle. To do so, set Purge to On.
The flow meter is purged for the time specified under PurgeTime. 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.
To make sure that any air bubbles that might be trapped in the NC pump are
completely removed, observe the following information about the minimum purge
time.
Application
Nano LC (ProFlow flow
meter)
Capillary LC
Micro LC
Operating Instructions
Recommended purge time
(minimum)
10 minutes
5 minutes
5 minutes
UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page 75