Evaluating The Leak Test Results - Agilent Technologies 1220 Infinity II LC User Manual

9
Test Functions and Calibration
Solvent Delivery System

Evaluating the Leak Test Results

Defective or leaky components in the pump head lead to changes in the
leak-test pressure plot. Typical failure modes are described below.
Please notice the difference between an error in the test and a failure of the test! An error
N O T E
means that during the operation of the test there was an abnormal termination. If a test
failed, this means that the results of the test were not within the specified limits.
Often it is only a damaged blank nut itself (poorly shaped from overtightening) that causes
N O T E
a failure of the test. Before investigating on any other possible sources of failure make
sure that the blank nut you are using is in good condition and properly tightened!
Table 26
Potential Cause
Pump not running.
Purge valve open.
Loose or leaky fittings.
Wrong solvent-line connections.
Contaminated purge valve.
Large leaks (visible) at the pump seals.
Large leaks (visible) at active inlet valve, outlet
valve, or purge valve.
148
No Pressure increase at Ramp 1
Corrective Action
Check the logbook for error messages.
Close the purge valve, and restart the test.
Ensure all fittings are tight, or exchange
capillary.
Ensure the solvent lines from the degasser are
connected correctly.
Open and close purge valve to flush out
contamination. Exchange the valve if still leaky.
Exchange the pump seals.
Ensure the leaky components are installed
tightly. Exchange the component if required.
1220 Infinity II LC System User Manual