Cleaning The Source; Assembling The Enclosed Source - Ametek FlarePro User Manual

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4-16 FlarePro Process Mass Spectrometer

Cleaning the Source

The ion volume and the source can be cleaned gently using a soft
brush, such as a toothbrush, and a small round brush to access the
interior of the ion volume.
1. Make a paste by mixing aluminum oxide powder (Lapmaster 1300
or equivalent) with tap water.
2. Using a small nylon bristle brush, wet the parts and apply the
paste. A small round brush is required to clean the interior of the
ion volume and the holes in the lenses. Scrub only enough to
remove any deposits or discolorations. Scrubbing too long can
damage the finish on the source parts. Rinse parts thoroughly in
tap water.
3. Sonicate the parts in a mixture of deionized water and cleaner
(Alconox Powdered Precision Cleaner or equivalent) for
approximately one hour. Remove from the sonicator.
4. Rinse the parts thoroughly in deionized water. Replace in the
sonicator.
5. Sonicate the parts in deionized water for approximately one hour.
6. Remove parts from the water and dry the parts by baking in an
oven at 100 °C for 30 minutes. Alternatively, dry the parts with a
heat gun until the water has evaporated.
7. Reassemble the source.

Assembling the Enclosed Source

Assemble the source in reverse order of the disassembly taking care
to center each ceramic washer in its seat to prevent cracking it. Do
not crush the ceramic washer or strip the threaded parts by
overtightening the source hardware – tighten to snug only.
1. Install the source so that Lens 2 is seated against the ceramic
quadrupole collar. The hardware binding the source together may
need to be loosened temporarily so that all the rods can fit through
the ceramic quadrupole collar holes, and so that Lens 2 can sit
against the collar. Carefully insert the rods through the holes in the
ceramic collar and into the barrel connector and the detector flange
assembly according to Figure 4-3. Be sure that the screws are
tightened snugly to the hardware once the source is in place.
2. Install the filament. See "Replacing the Filament" in this chapter.
3. Once the head has been checked, replace the ion volume by
setting it back on the head (Figure 4-3) and secure it with the set
screw. Insert the head into the vacuum chamber and secure it
with the six bolts removed earlier.