Agilent Technologies 1220 Infinity II LC User Manual

1220 Infinity II LC System User Manual 149
Test Functions and Calibration
9
Solvent Delivery System
Table 27 Pressure limit not reached but plateaus horizontal or positive
Potential Cause Corrective Action
Degasser and pump not flushed sufficiently (air
in the pump head).
Purge the degasser and pump thoroughly with
isopropanol under pressure (use the restriction
capillary).
Wrong solvent. Install isopropanol. Purge the degasser and
pump thoroughly.
Table 28 All plateaus negative
Potential Cause Corrective Action
Loose or leaky fittings. Ensure all fittings are tight, or exchange
capillary.
Loose purge valve. Tighten the purge valve (14 mm wrench).
Contaminated purge valve. Open and close purge valve to flush out
contamination. Exchange the valve if still leaky.
Loose pump head screws. Ensure the pump head screws are tight.
Leaking seals or scratched plungers. Exchange the pump seals. Check the plungers
for scratches. Exchange if scratched.
Leaking outlet valve. Exchange the outlet valve.
Leaky damper. Exchange damper.
Table 29 First plateau positive, second and third plateau negative
Potential Cause Corrective Action
Air in pump or new seals not yet seated. Flush pump thoroughly with isopropanol under
pressure (use restriction capillary).
Loose active inlet valve. Tighten the active inlet valve (14 mm wrench). Do
not overtighten!
Loose pump head screws. Ensure the pump head screws are tight.
Loose outlet valve. Ensure the sieve in the outlet valve is installed
correctly. Tighten the outlet valve.

Agilent Technologies 1220 Infinity II LC Specifications

General

Brand	Agilent Technologies
Model	1220 Infinity II LC
Category	Laboratory Equipment
Language	English