Evaluating The Results - Agilent Technologies 1200 Series Reference Manual

Evaluating the Results

The sum of all leaks between the pump and the blank nut will be indicated by a
pressure drop of >2 bar/minute at the plateau. Note that small leaks may cause
the test to fail, but solvent may not be seen leaking from a module.
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.
If the pressure test fails:
• Ensure all fittings between the pump and the blank nut are tight. Repeat the
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!
• If the test fails again, insert the blank nut at the outlet of the previous
• If the pump is determined to be the source of the leak, run the leak test.
1200 Series QP Reference Manual
pressure test.
module in the stack (eg. autosampler, port 6 of the injection valve), and
repeat the pressure test. Exclude each module one by one to determine
which module is leaking.
Troubleshooting and Test Functions 3
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