MKS Instruments UK Ltd
Microvision2 Hardware Manual – SP101015.102 August 2010
34
9.4.2 Fitting filaments
Open ion source
The fitting of filaments is simply the reversal of the procedure for removing them. Care should be taken at all
stages to ensure that no shorts are introduced and that the analyser is kept clean.
1. Using tweezers, carefully place filament plate onto the mounting posts. Be careful not to touch the
source cage with either filament. There is no orientation of the filament plate required, except that the
mounting holes line up with the mounting posts.
2. Re-fit the two M2 x4 pan head screws through the filament plate and tighten securely. Do not over
tighten.
3. Re-fit each barrel connector in the same orientation as removed, sliding each barrel connector over the
connecting lead and filament post and while holding the barrel connector firmly with pliers, tighten all
screws.
Do not slide the barrel connector all the way down the filament post as you may short-circuit the insulating
feedthrough. Leave 1- 2mm of clearance.
4. Before re-fitting the analyser to your vacuum chamber, refer to page 28 for details on how to check for
any short circuits.
5. Replace the analyser into your vacuum housing and again check for shorts or grounding to the outer
vacuum housing.
You are now ready to pump down and continue the operation of your quadrupole.
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