Visually Inspect The Qma 250 Analyzer; Fig. 20: Ion Source With Open Ion Source As An Example - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

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.
9.3.1 Visually inspect the QMA 250 analyzer
Prerequisite
● PrismaPro deactivated
1
5
4
4
3
Fig. 20:
1 Filament unit connections (3×)
2 Deflector cage
3 Ceramic insulators of the filament wiring and ion source wiring
6)
clean, lint-free and powder-free laboratory gloves.
ry.
Visual inspection before replacing the filament unit
Inspect and assess the complete ion source before replacing the filament unit. Pfeiffer Vac-
uum recommends replacing the complete ion source in the event of damage, significant de-
posits or soiling as well as signs of contamination (e.g. discoloration).
Ion source with open ion source as an example
The ceramic insulators of the filament wiring are longer than the ceramic insulators of the ion source wiring.
NOTICE
1
1
2
6)
Maintenance
4 Ion source connections (3×)
5 Anode cage (internal)
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