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

Maintenance
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.
9.4.1 Replacing the filament unit of the open ion source
Damage to open ion source filament anode from horizontal movement
Excessive horizontal movement will lead to damage to the anode.
► Place the filament unit onto the ion source carefully and thoroughly.
► Make sure that the anode and the counterbore are aligned.
Prerequisite
● PrismaPro deactivated
Required tools
● Socket key, WAF 3.2
● Flat screwdriver, 3 mm
● Torque wrench
● Flat pliers
Required aids
● Mounting aid for the analyzer
Spare parts required
● Filament unit for open ion source with tungsten filaments or Y
● If necessary, set of parts PT 163 544 for the replacement of screws, nuts or clamps
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clean, lint-free and powder-free laboratory gloves.
ry.
Spring washer on filament unit
The spring washer on the filament unit ensures the flexible contact between the deflector
cage and ground (GND) of the QMA. The spring washer must have contact with the fixing
screw without the two parts being bolted together.
NOTICE
NOTICE
NOTICE
O -coated iridium filaments
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