Pfeiffer Vacuum PrismaPro QMA 250 F1, Перевод оригинала

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1 2
3 4 5 6
Fig. 21: Connections of the filament and the ion source with clamps
1 U-clamp 4 Well fitted connection
2 Screw 5 Clamp parallel to U-clamp
3 Clamp not parallel to U-clamp 6 Poorly fitted connection
Good connection Poor connection
● Wire in corner of U-
clamp
● U-clamp not parallel to
clamp
● 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.
Tbl. 12: Connections of the filament and the ion source
1 1
2
2
Fig. 22: High-frequency connections of the quadrupole mass filter
1 Screws of the quadrupole mass filter 2 High-frequency connections
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-
age.
– The ceramic insulators isolate the wires from the jacket tube of the analyzer.
6. Check the anode cage for deformation or contamination.
– Contamination may not be immediately evident and can only be identified as a result of poor
performance.
Maintenance
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