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Technical Information
Yttria-coated iridium filament Replacement
This replacement filament kit (Part No. X3004-64403) contains two yttria-coated iridium
filaments stapled to a cardboard backing and packed in a foam-lined plastic box. Each
filament also has a stabilizing bar soldered to the base of the filament for rigidity.
To remove and change the damaged filament:
1
Carefully loosen all six set screws and pull the old filament support brackets
out.
Handle the gauge only by its ceramic base to prevent damage to the delicate
CAUTION
wires. Wear nylon gloves to prevent placing fingerprints on the gauge.
The oil from fingerprints extends pumpdown time.
2
Carefully remove the stabilizing bar by very carefully cutting between the posts
of the yttria-coated iridium filaments.
3
Cut the staples affixing the assembly to the cardboard backing.
4
Insert the long filament support bracket into its collar so that the filament is
located 0.050 to 0.070" from the grid structure.
5
Tighten the set screws.
6
Insert the short filament support brackets into their collars, pushing them in as
far as they will go before tightening the set screws. This ensures proper tension
on the filament.
7
Carefully trim the remainder of the stabilizing bar from each filament post.
Agilent UHV-24/UHV-24p Ionization Gauge User Manual
25
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