Testing The Piston Seals For Leakage - Thermo Scientific thermoscientific Vanquish Pumps C Operating Manual

7.6.9

Testing the Piston Seals for Leakage

When
Parts and additional items required
Follow these steps
Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual
9. Inspect all flow connections on the pump head for indications of
leakage. Tighten leaky connections when the system pressure is
down to zero.
10. Optional: Test the system wash system and pump for leakage (see
Testing the Seal Wash System for Leakage (} page 130)
the Pump for Leakage (General Test)
• Pressure pulsation, shift in retention times and/or poor
reproducibility can indicate possible piston seal leakage.
• If messages regarding piston seal leakage appear in the
chromatography software, for example, "The piston seal leakage
has exceeded the recommended limit (code 4121)".
• Backpressure capillary (from Diagnostics tool kit) (optional)
• Isopropanol
1. From the Chromeleon software, start a seal wash cycle.
2. When the seal wash cycle is complete, disconnect the tubing from
the seal wash detector (port labeled in).
Figure 55: Seal wash detector
No. Description
1 Seal wash detector
2 Tubing connection port (port labeled in)
7 • Maintenance and Service
and
(} page 179)).
Page 159
Testing