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ACQUITY H-Class QSM - Pressure fluctuations (Guided Troubleshooting) - WKB93279

Article number: 93279

SYMPTOMS

  • Pressure fluctuations
  • Unstable delta psi
  • Delta psi above 20

ENVIRONMENT

ACQUITY H-Class Quaternary Solvent Manager (QSM)

STRATEGY

  1. Inspect lines for air bubbles and prime solvents - WKB28335
  2. Inspect degasser tubing for kinks and confirm degasser pressure reading - WKB9737
  3. Confirm that solvent filters and solvent sinkers are not clogged -  WKB45863
  4. Possible sticky check valves after switching solvents - WKB55705
  5. Possible faulty check valves - WKB21289
  6. Blockage in GPV - WKB19400
  7. Possible leak at pump heads due to worn seals - WKB4833

ADDITIONAL INFORMATION

 

gradient proportioning valve, pressure ripple

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