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8
Troubleshooting
No Ions Present in Scans
No Ions Present in Scans
Checking the ISQ System Firmware
104
ISQ User Guide
IMPORTANT
When inserting a cold ion source cartridge such as after cleaning or when
switching between EI and CI modes, the ion source and lens stack will expand as the
source cartridge heats, often pushing the ion volume and lenses away from the rear of the
instrument where they are firmly held by the RF Lens spring contacts. To avoid
intermittent electrical contacts to the lenses, you should insert the ion source cartridge,
wait 30 min for it to get to temperature, then remove and reinsert it. See the ISQ
Hardware Manual for instructions on cleaning and inserting the ion source cartridge.
Try the following solutions if you cannot see ions in any scans
1. Remove and reinstall the ion source cartridge.
2. Switch filaments.
3. Confirm the starting tune file is appropriate for ionization mode or source cleanliness
level.
4. Confirm the correct ion volume is inserted (EI or CI).
5. Run diagnostic checks (diagnostics only tune type).
6. Clean the ion source.
Try the following if you do not see ions in CI mode
1. Confirm that the CI ion volume is installed.
2. Confirm that the reagent gas is connected and turned on.
3. Switch filaments.
Confirm that you are running the correct version of the ISQ instrument firmware.
To find the version of firmware installed on your ISQ system
1. On the ISQ Dashboard, click Air & Water/Tune. This opens ISQ Manual Tune.
Thermo Scientific
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