User manual

122 1260 Nanoflow Pump User Manual
8 Test Functions and Calibration
Leak Test
Third plateau negative or unstable and at least one other plateau positive
Probable cause Suggested actions
1 Air in channel A or new seals not yet seated.
Flush channel A thoroughly with isopropanol
under pressure (use restriction capillary).
2 Loose active inlet valve in channel A.
Tighten the active inlet valve in channel A
(14 mm wrench). Do not overtighten!
3 Loose pump head screws in channel A.
Ensure the pump head screws in channel A are
tight.
4 Loose outlet valve in channel A.
Ensure the sieve in the outlet valve is installed
correctly. Tighten the outlet valve.
5 Leaking seal or scratched piston in channel
A1.
Exchange the pump seals in channel A. Check
the pistons for scratches. Exchange if scratched.
6 Defective active inlet valve in channel A.
Exchange the active inlet valve in channel A.