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Waters

Unstable pressure on ACQUITY UPLC H-Class - WKB22900

Article number: 22900

SYMPTOMS

  • Pressure is unstable
  • Sonicating the check valves does not resolve issue
  • Primary pressure trace displays little to no pressure difference on each stroke

ENVIRONMENT

  • ACQUITY UPLC H-Class
  • ACQUITY UPLC H-Class Bio
  • ACQUITY Quaternary Solvent Manager (QSM)

CAUSE

Faulty primary check valve

FIX or WORKAROUND

  1. Replace the check valve.

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