MKS Instruments UK Ltd
Cirrus2 Hardware Manual – SP101017.100 June 2011
47
Remove for cleaning
The analyser design permits the removal of the ion source as one complete assembly for cleaning or replacement. The
ion source is easily aligned to the main analyser assembly, allowing easy replacement without the need for special jigs.
Below is a list of the tools and equipment you will require. We recommend that you assemble the following items before
you start. Remember that the instrument is supplied with a tool kit that contains some of the things you will need.
Small jeweler’s screwdriver (2mm)
Pair of tweezers
Small pair of smooth jawed needle nosed pliers
Pair of clean cotton gloves
Clean bench on which to work
Ohmmeter
Clean container in which to put small parts
Pen and paper on which to make notes and sketches
1. Remove the analyser from the vacuum system, place it on the bench in an upright position (holding the analyser in a
small bench vice or analyser support stand is recommended).
2. If you are cleaning the ion-source, then you should follow the steps on removing the filaments before continuing.
3. Loosen the two M2x4 screws highlighted in red that secure the filament connecting wires, see Fig.1.
4. Loosen the three M2 x3 set screws highlighted in red that secure the three insulated wires that run from the analyser
flange assembly to the source, repeller and extractor plates and slightly bend the wires out of the way, see Fig.2.
Loosen the three M1.6 x2 screws highlighted in red that secure the three insulated wires that run from the analyser
flange assembly to the source, repeller and extractor plates and slightly bend the wires out of the way, see Fig.2a.
5. Remove the three M2 x4 screws and shakeproof washers highlighted in red that hold the source assembly to the filter
assembly, see Fig.3.
6. Carefully withdraw the source assembly from the filter, Fig.4.
Refer to the views on the following pages.
