Baseline wanders on UPC2 PDA - WKB69066

SYMPTOMS

• Baseline wanders seen on UPC2 PDA
• 
• Passes leak tests 
• Passes ABPR health test
• PDA energy is good

ENVIRONMENT

• ACQUITY UPC2 PDA Detector

CAUSE

CO₂ purity is too low. Tank is only 99.0% pure.

FIX or WORKAROUND

Exchange the CO₂ source for CO₂ of high enough purity (99.97% minimum).

ADDITIONAL INFORMATION

Refer to page 93 of the ACQUITY UPC2 System Guide (715004521) for more information on system specifications, including CO₂ purity.