Evaluating The Results - Agilent Technologies 1200 Series User Manual

Evaluating the Results

The sum of all leaks between the pump and the blank nut will be indicated by
flow rate of > 10 µl/minute to keep the pressure constant. 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 where not within the specified limits.
Do not overtighten fittings! After the first major increase of resistance when tightening a
N O T E
previously loose fitting, the fitting should not be tightened any further than an additional
1/8 to 1/4 wrench turn.
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!
Large internal leaks at the EMPV can easily be identified by observing a flow
out through the waste tubing of the EMPV, while the EMPV should be closed.
Agilent 1200 Preparative Pump User Manual
Troubleshooting and Diagnostics
Pressure Test
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