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Troubleshooting and Test Functions
Pressure Test
with a flow rate of 510 µl/min and stroke of 100 µl. The pump continues to
pump until a system pressure of 390 bar is reached.
Step 2 When the system pressure reaches 390 bar, the pump switches off. The
pressure drop from this point onwards should be no more than 2 bar/minute.
Positioning the blank nut
To test the complete system’s pressure tightness, the blank nut should be
positioned at the column compartment outlet (or the outlet of the last
module before the detector).
If a specific component is suspected of causing a system leak, place the blank
nut immediately before the suspected component, then run the pressure test
again. If the test passes, the defective component is located after the blank
nut. Confirm the diagnosis by placing the blank nut immediately after the
suspected component. The diagnosis is confirmed if the test fails.