MKS Instruments UK Ltd
Cirrus2 Hardware Manual – SP101017.100 June 2011
45
Fitting filaments
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 each filament plate onto the mounting posts. Each filament plate has a locating hole
which fits over a locating stud.
2. Loosely re-fit the four M2 x4 pan head screws through the filament plates.
3. Once all four screws have been loosely fitted, check the alignment of both filament plates before tightening securely.
4. 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
5. Before re-fitting the analyser to your vacuum chamber, refer to page 41 for details on how to check for any short
circuits.
6. 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.