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Waters

ACQUITY PDA/TUV baseline stepping - WKB10081

Article number: 10081

SYMPTOMS

  • Baseline stepping at random
  • Random shift in baseline

ENVIRONMENT

  • ACQUITY TUV
  • ACQUITY PDA

CAUSE

Faulty back-pressure regulator.

FIX or WORKAROUND

  1. Replace back-pressure regulator (700002676).
  2. If the instrument is thermal control type, replace back-pressure regulator (700010006).

ADDITIONAL INFORMATION

To test if the back-pressure regulator is working, disconnect the fitting from the outlet of the flow cell while flow is on.  The total system pressure should drop about 250psi if it is functional.

Please note, the back-pressure regulator is only required for light-guided analytical flow cells.

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