Agilent Technologies 1100 Series Service Manual page 89

Evaluating the Results of the Leak Test
Defective or leaky components in the pump head lead to changes in the
leak-test pressure plot. Typical failure modes are described below.
Pressure
[bar]
Figure 10
Please notice the difference between an error in the test and a failure of the test! An error
NO TE
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.
Often it is only a damaged blank nut itself (poorly shaped from overtightening) that causes
NO TE
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!
The pressure plots shown below are examples only. The plots may vary depending on the
NO TE
type and degree of leakage.
1100 Series Nano Pump Service Manual
Leak Test Pressure Plot
Troubleshooting and Test Functions
Plateau 3
Plateau 1 Plateau 2
Time [minutes]
2
Plateau 4
77