Thermo Scientific thermoscientific Vanquish Pumps C, Operating Manual

Page: 168 / 296

7 • Maintenance and Service
Page 168 Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual
7.8 Mixing System
TIP The information and references to the static mixer in this section
apply equally to the inline filter if installed.
Follow the sequence of steps for the maintenance procedure that you
want to perform:
• To test the static mixer for permeability, see Testing the Static Mixer
for Permeability ( } page 168) .
• To replace the static mixer or capillary mixer, see Replacing the
Static Mixer or Capillary Mixer ( } page 169) .
7.8.1 Testing the Static Mixer for Permeability
TIP With the dual pump, test each static mixer separately.
When
If you observe pressure pulsation, inconstant pressure, or high
backpressure at the column and pump
Additional items required
• Water as solvent
• Tissue
Follow these steps
NOTICE
Turning the static mixer in the mounting bracket when loosening or
tightening capillaries can damage the mounting bracket.
To prevent the mixer from turning in the bracket, hold the mixer with an
open-end wrench when you loosen or tighten capillaries on the mixer.
1. Disconnect the capillary on the outlet of the static mixer.
2. To absorb liquid leaving the static mixer, place the tissue on the
mixer outlet.
3. Apply a flow of 2 mL/min using water.
4. Observe the pump pressure.