Purging The Pump - Thermo Scientific Vanquish VH-P10-A-02 Operating Manual

6 • Operation
6.8

Purging the Pump

When
Items required
Settings
Page 98
Purging the pump means rinsing the pump for a short time at a higher
flow rate, using the selected solvents. From the purge unit, the solvent is
automatically dispensed to waste.
•
The pump is operated for the first time
To flush out the isopropanol that is present in some components of
the pump when the pump is shipped from the manufacturing site
• One or more solvent lines have been empty
•
To remove air bubbles that might be trapped in the system (pump
head, solvent lines) because air bubbles in the system may lead to
the following problems:
♦
Pressure pulsation
♦
High noise level or pulsation during pump operation
♦
Non-reproducible analysis
•
When changing to a different type of solvent, for example, when
changing to a different analytical method
Solvents suitable for purging
To flush out the isopropanol when operating the pump for the first time,
use solvents that are miscible with isopropanol. If they are not, use an
appropriate intermediate solvent.
The following settings are considered for the purge cycle:
Setting Description
Purge flow The standard setting is 5 mL/min.
You can adapt the setting in Chromeleon if required. The setting
is considered also when purging the pump from the keypad.
Purge time The standard purge time is 5 minutes.
You can adapt the setting in Chromeleon if required. The setting
is considered also when purging the pump from the keypad.
Vanquish Pumps (VH-P10-A-02) Operating Manual