Replacing The Ion Source; Replacing The Open Ion Source - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

9.5 Replacing the ion source
Impairment from contamination and damage
Touching the devices or components with bare hands increases the desorption rate and leads to in-
correct measurements. Dirt (e.g. dust, fingerprints, etc.) and damage impair the function.
► During assembly and maintenance work on high or ultra high vacuum systems, always wear
► Only use clean tools.
► Make sure that the connection flanges are free of grease.
► Remove protective caps and protective covers from flanges and connections only when necessa-
► Remove the analyzer's transport protection only when necessary.
► Carry out all work in a well lit area.
Filament damage from incorrect handling
Filaments are highly sensitive, pre-assembled units. You can easily damage filaments by incorrect
handling.
► Allow only qualified personnel to replace filaments.
► Never touch the filament, even with gloves.
► Never bend the filament unit.
► Never tilt the filament unit, as otherwise you will bend the formation room.
9.5.1 Replacing the open ion source
Property damage caused by falling ceramic insulators
The fixing screws of the ion source only have 4 turns of thread and can quite easily fall into the quad-
rupole mass filter as the ion source is being disassembled. When turning the analyzer upside down to
take out the parts, loose ceramic insulators from the ion source wiring fall out and break or splinter.
► Hold the ceramic insulators of the ion source wiring securely in place when turning the analyzer
Prerequisite
● PrismaPro deactivated
Required tools
● Flat screwdriver, 1.5 mm
● Flat screwdriver, 3 mm
● Crosshead screwdriver, Philips #1
● Torque wrench
● Flat pliers
Required aid
● Mounting aid for the analyzer
Required spare parts
● Open ion source with tungsten filaments or Y
● If necessary, set of parts PT 163 544 for the replacement of screws, nuts or clamps
clean, lint-free and powder-free laboratory gloves.
ry.
upside down.
NOTICE
NOTICE
NOTICE
O -coated iridium filament
2 3
Maintenance
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