After a front-end source cleaning, weak to no ion beam seen on SQD2, Xevo TQ Absolute, Xevo TQ MS, Xevo TQD, Xevo TQ-S, Xevo TQ-S cronos, Xevo TQ-XS, or Xevo TQ-S micro - WKB253132
Article number: 253132
SYMPTOMS
- Strong ion beam signal before venting/cleaning of front-end source components
- Weak to no ion beam observed in positive or negative ion modes with same tune page settings
- Engineer settings not changed
- All readbacks are normal
- Unit pumps down and pressure test passes
- Isolation valve confirmed open
- Flow to/from the probe confirmed
ENVIRONMENT
- SQ Detector 2
- Xevo TQD
- Xevo TQ-S cronos
- Xevo TQ-S micro
- Xevo TQ MS
- Xevo TQ-S
- Xevo TQ-XS
CAUSE
Missing O-ring on the ion support block section that pushes against the ion guide
FIX or WORKAROUND
Install the O-ring.
ADDITIONAL INFORMATION
Example of missing O-ring from the lip of the ion support block section that pushes against the ion guide:
Verify that all O-rings are present and undamaged.
Ensure that the source region vacuum pressure readback on Xevo TQ MS, Xevo TQ-S, or Xevo TQ-XS is within performance range, and that the vacuum pressure readback prior to venting and cleaning is not much higher.