1260 Infinity Binary Pump User Manual 129
Test Functions and Calibration
8
(System) Pressure Test
Evaluating the Results
The sum of all leaks between the pump and the blank nut will add up to
the total leak rate. Note that small leaks may cause the test to fail, but
solvent may not be seen leaking from a module.
If the pressure test fails:
• Ensure all fittings between the pump and the blank nut are tight.
Repeat the pressure test.
• If the test fails again, insert the blank nut at the outlet of the previous
module in the stack (e.g. autosampler, port 6 of the injection valve), and
repeat the pressure test. Exclude each module one by one to determine
which module is leaking.
• If the pump is determined to be the source of the leak, run the valve
test to identify the defective pump component.
Please notice the difference between an error in the test and a failure of the test! An error
is caused by the abnormal termination during the operation of the test whereas a failure of
a test indicates that the test results were not within the specified limits.
Often it is only a damaged blank nut itself (poorly shaped from overtightening) that causes
the test to fail. 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!
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