- No ions observed in negative ion mode for either resolution mode
- Detector gain has not run for a long time in negative ion mode
- Xevo G2
- Xevo G2-S
- Xevo G2-XS
- SYNAPT G2
- SYNAPT G2-S
- SYNAPT G2-Si
The detector voltage is too low to see a beam
FIX or WORKAROUND
- Manually increase the detector voltage in negative ion mode by going to the tune page dropdown menu > setup > system view. The password is access.
- Go to System > Auto Values, and increase the detector voltage by 50 to 100 V until the beam is visible.