System pressure far lower than expected - WKB49930
Article number: 49930
SYMPTOMS
- Solvent manager pressure much lower than expected
- Replacing check valve does not correct issue
- Found: Retention times slightly later than expected
- Found: Peak shape is not good
- Found: Dynamic leak test failure: Accumulator leak rate >10,000 nL/min
ENVIRONMENT
- ACQUITY UPLC H-Class
- ACQUITY UPLC H-Class Quaternary Solvent Manager (QSM)
CAUSE
Bad high-pressure seal
FIX or WORKAROUND
Replace the high-pressure seal in the pump head.
ADDITIONAL INFORMATION