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High delta psi pressure fluctuations cause gradient test to fail on H-Class QSM - WKB28511

Article number: 28511

SYMPTOMS

  • GPV test fails
  • High delta psi
  • Pressure drops to 0 psi
  • The following parts were replaced without improvement:  column, active preheater, GPV, GPV filters, tubing from GPV to manifold, pump head seals, i2V check valve, passive check valve, primary actuator, accumulator actuator

ENVIRONMENT

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

CAUSE

Faulty degasser pump

FIX or WORKAROUND

Replace the degasser pump (700001352).

ADDITIONAL INFORMATION

 

APH, checkvalve, gradient proportioning valve, pressure ripple, UPAQSM, UPPQSM, UPQSM, UPQSM, UPQSM+, UPQSM+, UPQSMBIO, UPQSMBIO, UPQSMBIO+, UPSMFTN, UPSMFTN+, UPSMFTNB+, UPSMFTNBIO

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