100 Agilent 1200 Preparative Pump User Manual
6 Troubleshooting and Diagnostics
Leak Test
Evaluating the Results
Defective or leaky components in the pump head lead to changes in the
leak-test pressure plot. Typical failure modes are described below.
Error Limits Exceeded for One or Both of the Encoder
Values and One or Both of the Maximum allowed Flow
Rates in the Constant Pressure Mode
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 the 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!
Probable cause Suggested actions
1 Air bubble. Flush pump thoroughly.
2 Loose or leaky fittings. Ensure all fittings are tight, or exchange
capillary.
3 Large leaks (visible) at the pump seals. Exchange the pump seals.
4 Large leaks (visible) at valve, outlet valve,
filters, multi assembly, capillaries or EMPV.
Ensure the leaky components are installed
tightly. Exchange the component if required. Run
the EMPV cleaning procedure.
To Next Page
Loading...
Need help?
General
