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Large pressure drops on Alliance during injection cycle - WKB54382

Article number: 54382

SYMPTOMS

  • During injections, pressure drops from 2000 psi down to 100-200 psi
  • Pressure is stable both during acquisition and before acquisition
  • Pressure drop occurs immediately after sample is drawn into the needle
  • Empower "system pressure" channel, when acquired, shows the pressure drop at the very beginning of the acquisition

ENVIRONMENT

  • Alliance HPLC System
  • 2695 Separations Module
  • Empower 3

CAUSE

Leak in seal pack

FIX or WORKAROUND

  1. Replace the seal pack high-pressure seals. Part 700002760 - SEAL, PKG (2)
  2. Run the "Adjust Seals" diagnostic.

ADDITIONAL INFORMATION

To order the full seal pack rebuild kit for the Alliance, refer to article 12343 for the old style seal pack or article 48204 for the new style seal pack.

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