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ACQUITY BSM system pressure low at 1.00 mL/min flow - WKB91458

Article number: 91458

SYMPTOMS

  • The primary check valve (I2V valve) stops working at 1.00 mL/min flow.

  • Flow set to 0.99 and 1.01 mL/min is fine.

  • BSM has a stable pressure, but when set to 1.00 mL/min, the primary strokes disappear and the flow and system pressure is close to zero PSI/bar.

  • You can restore I2V function by resetting the instrument via the console or cycling the power to the BSM.

ENVIRONMENT

  • ACQUITY UPLC BSM
  • MassLynx

CAUSE

Corrupt firmware or defective PCB causing corruption.

FIX or WORKAROUND

Reload firmware to ACQUITY UPLC BSM module or replace CPU 3000 PCB (700005763), personality card PCB (700009786), or both.

ADDITIONAL INFORMATION

 

id91458, checkvalve, UPBINARY, UPBINARY, UPBSM+, UPIBSM, UPIBSM, UPIBSM+, UPIBSM+, UPISMFL, UPISMFL+, UPISMFTIVD, UPISMFTN, UPISMFTN+, UPPBSM, UPSMPMGR

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