TUV/PDA back pressure regulator is not applying 250psi pressure - WKB87711

SYMPTOMS

• Back pressure regulator is not applying 250psi during inspection.
• Leakage
• Baseline noise / drift

ENVIRONMENT

• ACQUITY UPLC Tunable UV Detector
• ACQUITY UPLC PDA Detector
• ACQUITY UPLC PDA eλ Detector

CAUSE

Back pressure regulator deterioration.

FIX or WORKAROUND

1. Replace back pressure regulator
   1. Part number 700002676
      • ACQUITY UPLC PDA/PDA eLambda Detector (P/N 186015026/030)
      • UPTUV-E (Manufactured November 2005 through March 2010, P/N 186015028)
   2. Part number 700010006
      • ACQUITY UPLC PDA/PDA eLambda Detector (Thermally managed)
      • UPTUVTC (P/N 186015031)
2. Confirm that a pressure of 250psi is applied when flowing.

ADDITIONAL INFORMATION