990 CLD Autoline™ Leak Detector
4-6
DRAFT 2/2/04
6. Remove the cold cathode gauge housing, disconnect the high-voltage connector at the
gauge header, and remove the ion source and preamplifier.
7. Discard the ion source or return it to Vacuum Technologies for exchange.
Handle the other two parts by the flanged pin end only to prevent contamination by
skin contact.
8. Slip out the baffle between the cold cathode gauge and the ion source cavities.
9. Carefully remove the ground slit plate from the ion source cavity, using a split-blade,
screw-holding screwdriver.
10. Remove the four screws on each side of spectrometer tube body and slip out both pole
pieces.
11. Discard O-rings.
12. Using a Scotchbrite
™
pad, remove any heavy deposits from the surfaces of the baffle,
ground slit plate, cold cathode gauge liner, and anode loop, until bare metal surfaces
are exposed.
CAUTION
Under no circumstances use a chemical cleaner — especially
strong detergents or alkaline cleaners. Do not use Alconox or a
similar type of detergent. Do not use crocus cloth, as it leaves a
residue.
13. Rinse the spectrometer tube body, pole pieces, baffle, ground slit plate, and cold
cathode gauge parts in a Freon-type solvent (DuPont Freon TF or equivalent).
14. If foreign matter or stubborn stains remain, remove them with a Scotchbrite™ pad
(metal finishing grade).
15. Rinse again in Freon-type solvent, then rinse with methanol.
16. Allow all parts to air-dry — DO NOT use compressed air to blow dry.
17. Using new O-rings, reassemble the spectrometer tube pole pieces (the pole pieces are
interchangeable) and the magnet assembly.
18. Wipe all the O-rings clean with a lint-free cloth.
19. Install the ground slit plate with the prongs facing up.
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