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- Posts: 3
- Joined: Wed Dec 17, 2008 7:25 am
To anyone out there who knows about Finnigan Quantum Discovery QQQ
I observed that in Tune Master window, even though I set a particular value (say 84V) for the tube lens offset what I got in the readback is an inconsistent value that could anything from 20V to over 170V. Then when I check the readback for QO, QOO, and lens they too are fluctuating. The signal I get is of course fluctuating (the TIC plot looks like saw teeth) since the ion transmission itself is unstable. Anyone knows what went wrong with the system? Thanks.
I observed that in Tune Master window, even though I set a particular value (say 84V) for the tube lens offset what I got in the readback is an inconsistent value that could anything from 20V to over 170V. Then when I check the readback for QO, QOO, and lens they too are fluctuating. The signal I get is of course fluctuating (the TIC plot looks like saw teeth) since the ion transmission itself is unstable. Anyone knows what went wrong with the system? Thanks.
