Cirrus SP101013.111 – 10 October 2012
MKS Instruments UK Ltd., Spectra Products
Check the condition of the ion source. A second or third wash may be required.
Note: The ultra sonic bath may loosen some of the screws in the ion source, take care not to throw
these away when discarding the alcohol.
The analyser must be dried of cleaning solution before it can be used. We recommend the use of a
clean oven for this purpose. The oven should be set at 80 deg. C and the analyser baked for at least
two hours.
Note: Check the documentation on your cleaning solution for guidelines on handling the substance
and any fire or explosion risks involved.
After the bake period, check all the screws in the ion source are tight and re-fit the analyser to the
vacuum chamber.
A further bake under vacuum will be required to drive off any remaining residue.
8.8 Cleaning or replacing the ion source
The analyser design permits the removal of the ion source as one complete assembly, which can be
replaced or dismantled for cleaning.
The ion source automatically aligns on 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
contained 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
Source alignment jig
4 Pieces of straight clean wire (NOT tinned or insulated) 1mm x 25mm
Ohmmeter
Clean container in which to put small parts
Replacement filaments
Replacement source parts if necessary
Set of replacement ceramics is highly desirable if none are cracked and essential if any are broken
Some method of holding the analyser securely in an upright position, a small bench vice is ideal.
Pen and paper on which to make notes and sketches
Refer to the exploded views of the Analyser shown on Page 35.
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