1100 Series Nano Pump Service Manual 77
Troubleshooting and Test Functions 2
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.
Figure 10 Leak Test Pressure Plot
Plateau 1
Plateau 2
Plateau 3
Plateau 4
Time
minutes
Pressure
[bar]
NOTE
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 where not within the specified limits.
NOTE
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!
NOTE
The pressure plots shown below are examples only. The plots may vary depending on the
type and degree of leakage.