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Waters

Poor injection reproducibility with Alliance 2695 - WKB10442

Article number: 10442

SYMPTOMS

  • System is not delivering reproducible injections
  • Inconsistent area counts between injections from the same vial
  • Poor system precision
  • Poor peak shape, tailing, etc.

ENVIRONMENT

  • Alliance HPLC system
  • 2695 Separations Module

CAUSE

Air is leaving the system through the purge waste line, attributable to the seal pack being out of adjustment/alignment.

FIX or WORKAROUND

  1. Perform a wet prime.
  2. Verify that no air bubbles are leaving the system through the purge waste line.
  3. Perform "Adjust Seals" from front panel of the 2690/2695.
  4. Note any change from "Previous" to "Current" values.
  5. Verify that the values are within the recommended Waters range (see Additional Information section below).
  6. Accept the values.

ADDITIONAL INFORMATION

clipboard_eab8437df7962fd4f2502e6c8841d8f60.png

id10442, 2690, 2690D, 2690DUPGD, 2690UP, 2695, 2695D, 2695DE, 2695DEB, 2695DUP, 2695E, 2695EB, 2695INERT, 2695UP, A-10SSM, ALLCOLCLR, ALLCOLHTR, ALLCOLHTRB

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