Thermo Scientific thermoscientific Vanquish Pumps C, Operating Manual

Page: 109 / 296

6 • Operation
Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual Page 109
4. Start the purge cycle. You can start the purge cycle from the
Chromeleon software or by pressing the PURGE button on the
keypad.
5. Perform the above steps for all channels, including those that are
not used for the application.
6. When purging is complete, close the purge valve by turning the
valve knob clockwise.
NOTICE
Turn the valve knob only with your fingers. If the knob leaks, tighten a
little more. Be careful; overtightening may damage the purge valve
seals.
7. Empty the silicone tubing.
8. Dual pump only: If applicable, perform the purge procedure also for
the other pump.
Emptying the Silicone Tubing
NOTICE
Always empty the silicone tubing when purging is complete. When the
purge valve is closed, purge liquid remains in the tubing connected to
the purge outlet. Leaving the liquid in the tubing for a longer period
limits the tubing lifetime.
1. To absorb any liquid that might be leaving the purge outlet when the
tubing is removed, place the tissue under the outlet.
2. On the purge/sensor unit, remove the silicone tubing from the purge
outlet. The other end of the tubing remains in the purge drain port
outlet.
3. Hold the tubing so that any liquid that is present in the tubing flows
off through the drain port outlet.
4. On the purge/sensor unit, consider reconnecting the silicone tubing.
Troubleshooting with Persistent Air Bubbles
If you are unable to remove air bubbles with purging, purge the pump
against backpressure. Follow the procedure for running in new piston
seals in
Recommendations for New Piston Seals ( } page 151) .