Agilent Technologies 1200 Series Reference Manual page 93

First plateau positive, second and third plateau negative
Potential Cause
Air in pump or new seals not yet seated.
Loose active inlet valve.
Loose pump head screws.
Loose outlet valve.
Leaking seal or scratched plunger.
Defective active inlet valve.
First plateau negative, second plateau positive
Potential Cause
Leaking outlet valve.
Loose pump head screws.
Leaking seals or scratched plungers.
Ramp 3 does not reach limit
Potential Cause
Pump stopped due to error.
Large leaks (visible) at the pump seals.
Large leaks (visible) at active inlet valve, outlet
valve, or purge valve.
1200 Series QP Reference Manual
Troubleshooting and Test Functions
Corrective Action
Flush pump thoroughly with isopropanol under
pressure (use restriction capillary).
Tighten the active inlet valve (14mm wrench). Do
not overtighten!
Ensure the pump head screws are tight.
Ensure the sieve in the outlet valve is installed
correctly. Tighten the outlet valve.
Exchange the pump seals. Check the plungers for
scratches. Exchange if scratched.
Exchange the active inlet valve.
Corrective Action
Clean the outlet valve. Ensure the sieve in the outlet
valves are installed correctly. Tighten the outlet
valve.
Ensure the pump head screws are tight.
Exchange the pump seals. Check the plunger for
scratches. Exchange if scratched.
Corrective Action
Check the logbook for error messages.
Exchange the pump seals.
Ensure the leaky components are installed
tightly. Exchange the component if required.
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