Tbl. 12: Connections Of The Filament And The Ion Source; Fig. 21: Connections Of The Filament And The Ion Source With Clamps; Fig. 22: High-Frequency Connections Of The Quadrupole Mass Filter - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

Maintenance
1
Fig. 21:
1 U-clamp
2 Screw
3 Clamp not parallel to U-clamp
Good connection
● Wire in corner of U-
● U-clamp not parallel to
Tbl. 12:
1
2
Fig. 22:
1 Screws of the quadrupole mass filter
Procedure
1. Inspect the filament connections for secure fastening of the clamps (short circuit).
2. Inspect the filament connections for oxidized areas.
3. Inspect the ion source connections for secure fastening of the clamps (short circuit).
4. Inspect the ion source connections for oxidized areas.
5. Inspect the ceramic insulators of the filament connections and ion source connections for dam-
6. Check the anode cage for deformation or contamination.
46/86
2
6 5
Connections of the filament and the ion source with clamps
clamp
clamp
Connections of the filament and the ion source
High-frequency connections of the quadrupole mass filter
age.
– The ceramic insulators isolate the wires from the jacket tube of the analyzer.
– Contamination may not be immediately evident and can only be identified as a result of poor
performance.
4 3
4 Well fitted connection
5 Clamp parallel to U-clamp
6 Poorly fitted connection
Poor connection
● Wire too close to screw
● U-clamp parallel to clamp. This can result in a poor connection,
and in turn lead to an increase in resistance. The wire can be-
come loose due to temperature cycles, causing an intermittent
connection.
2 High-frequency connections
1
2