- Retention time shifts during sample set
- The dynamic leak end point vent valve test passes
- The dynamic leak test with column end point passes
- ACQUITY UPLC H-Class
- ACQUITY UPLC I-Class
- ACQUITY UPLC Sample Manager-FTN
The needle or the needle seat seal is leaking.
FIX or WORKAROUND
Replace the needle and the needle seat seal (kit 700008977 for I-Class; kit 700005215 for H-Class).