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Waters

Faulty transducer produces various errors on ACQUITY UPLC - WKB6508

Article number: 6508

SYMPTOMS

  • Error: Pump B: Transducer range error
  • Pressure fluctuations up to 26 000 psi. These are random and not synched with the pump movements.
  • ACQUITY console for BSM showing wrong backpressure
  • With flow stopped the pump Accumulator report a pressure of 1600 psi.
  • No blockage in the accumulator line.
  • Power off the module, fix the issue, but after 10 minutes of normal flow the transducer shows a pressure of 1600 psi without flow.
  • Hardware Error (12) message during Primary Pump compression step of dynamic leak test
  • Accumulator leak rate drops significantly during primary compression and displays negative values
  • When flow is applied, BSM pressure spikes during stroke
  • System will prime with no apparent issues
  • Total backpressure on BSM is not reflecting pressure for Accumulator pump

BSM-backpressure.jpg

ENVIRONMENT

  • ACQUITY UPLC I-Class Binary Solvent Manager
  • Accumulator actuator recently replaced
  • ACQUITY UPLC BSM
  • ACQUITY UPLC
  • ACQUITY UPLC I-Class
  • ACQUITY UPLC H-Class

CAUSE

Faulty transducer

FIX or WORKAROUND

  1. Replace transducer

Pressure_Transducer_Acquity_BSM.jpg

Use the correct one depending on the model.

ACQUITY UPLC and ACQUITY UPLC H-Class: Transducer Assembly (# 700002594)

ACQUITY UPLC I-Class: Pressure Transducer (# 700006045)

  1. Power off unit.
  2. Remove the cable attached to the appropriate transducer

transducer_cable.jpg

  1. Disconnect the tubing from the top and bottom of the transducer
  2. Remove the two small screws attaching the transducer to the front of the pumphead

transducer_screws.jpg

  1. Attach the new transducer to the pumphead and plug in the transducer cable until it clicks
  2. Power on the unit

ADDITIONAL INFORMATION

Avoid the use of:

1. halogenated solvents

2. solutions of hydrofluoric acid or aqueous solutions of fluoride at pH < 7 even at very dilute concentrations

as these can lead to premature failure of transducers and result in this error being observed.

pressure ripple

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