Agilent Technologies 1260 Infinity II User Manual page 99

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
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!
• 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 valve test to
Potential Causes of Pressure Test Failure
After isolating and fixing the cause of the leak, repeat the pressure test to
confirm the system is pressure tight.
Table 9
Potential Cause (Pump)
Purge valve open.
Loose or leaky fitting.
Damaged pump seals or pistons.
Loose purge valve.
InfinityLab LC Series 1260 Infinity II Binary Pump User Manual
pressure test.
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.
identify the defective pump component.
Potential Cause (Pump)
Test Functions and Calibration
(System) Pressure Test
Corrective Action
Close the purge valve.
Tighten the fitting or exchange the capillary.
Run the valve test to identify the defective
component.
Tighten the purge valve nut (14 mm wrench).
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