User manual

1260 Nanoflow Pump User Manual 121
Test Functions and Calibration
8
Leak Test
First plateau negative or unstable, and at least one other plateau positive
Second plateau negative or unstable, and at least one other plateau
positive
Probable cause Suggested actions
1 Leaking outlet valve in channel A.
Clean the outlet valve in channel A. Ensure the
sieve in the outlet valves are installed correctly.
Tighten the outlet valve.
2 Loose pump head screws in channel A.
Ensure the pump head screws in channel A are
tight.
3 Leaking seal or scratched piston in channel
A2.
Exchange the pump seals in channel A. Check
the piston for scratches. Exchange if scratched.
Probable cause Suggested actions
1 Leaking outlet valve in channel B.
Clean the outlet valve in channel B. Ensure the
sieve in the outlet valves are installed correctly.
Tighten the outlet valve.
2 Loose pump head screws in channel B.
Ensure the pump head screws in channel B are
tight.
3 Leaking seal or scratched piston in channel
B2.
Exchange the pump seals in channel B. Check
the piston for scratches. Exchange if scratched.