1290 Infinity Quaternary Pump User Manual 137
Test Functions and Calibrations
8
Pump Leak Rate Test
Troubleshooting the Pump Leak Rate Test
Secondary Leak > 3 µL/min
• Leak between the OBV and automatic purge valve
• Check for visible leaks on fittings and connectors
• Connector not fixed / tight enough
• Connector damaged
• Leaky filter frit assembly
• Remove the seal wash tubes from the support ring and check for leak
into the seal wash path
• Main seal leaking/damaged
• Piston damaged
• Remove waste lines from the automatic purge valve
• Damage to rotor seal and/or stator head
• Outlet valve not properly assembled
• Re-tighten the outlet valve
• Check the position of the gold seal
Dynamic Leak > 30 µL/min or Dynamic Leak Rate Test fails
• Air in the primary pump chamber
• Check for air in the solvent inlet lines and the Tuning signal
• Purge the lines, Prime and Condition the pump head
• Abort due to over pressure
• Check solvent and solvent settings
• Purge and condition the pump head with water
• Leak in Inlet Valve
• Check for moving air bubbles in tubing directly to the Inlet Valve
• Purge the lines with water to remove dirt
• Knock at the valve, clean or replace it
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