Thermo Scientific ISQ 7000 Hardware Manual page 106

1
Performing Routine Maintenance
Cleaning the Ion Source Cartridge
Replacing the Ion Source Cartridge in the ISQ 7000 Instrument with no VPI
78 ISQ 7000 Hardware Manual
16. Twist the end of the vacuum interlock handle and flip the handle up so that it rests next
to the vacuum interlock knob location. Then twist the end again to hold it in place.
CAUTION INSTRUMENT DAMAGE: Do not push the handle all the way up or you will
open the interior ball valve, which will cause you to lose vacuum and possibly damage the
instrument.
ATTENTION DOMMAGES À L'INSTRUMENT : ne relevez pas totalement la poignée ou vous
ouvrirez le robinet à tournant sphérique intérieur, ce qui entraînera une perte de vide et de
possibles dommages à l'instrument.
17. Remove the tool from the instrument.
18. Reattach the vacuum interlock knob.
Tip To prevent leaks in the vacuum interlock, we recommend that you leave the vacuum
interlock knob attached to the instrument, except when you are removing or inserting the
ion source cartridge. After you reattach the knob, press the Evacuate button will also
eliminate any air inside the vacuum interlock.
19. For optimal performance, wait at least fifteen minutes for the ion source to heat up to the
same temperature as the inside of the instrument. Otherwise, the masses or intensities
may be different
.
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.
1. Attach the ion source cartridge to the end of the small source removal tool as shown in
Figure 74.
Note For correct insertion, the notch on the ion source cartridge must be facing up.
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