148 1220 Infinity II LC System 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
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
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 No Pressure increase at Ramp 1
Potential Cause Corrective Action
Pump not running. Check the logbook for error messages.
Purge valve open. Close the purge valve, and restart the test.
Loose or leaky fittings. Ensure all fittings are tight, or exchange
capillary.
Wrong solvent-line connections. Ensure the solvent lines from the degasser are
connected correctly.
Contaminated purge valve. Open and close purge valve to flush out
contamination. Exchange the valve if still leaky.
Large leaks (visible) at the pump seals. Exchange the pump seals.
Large leaks (visible) at active inlet valve, outlet
valve, or purge valve.
Ensure the leaky components are installed
tightly. Exchange the component if required.
To Next Page
Loading...
Need help?
General
