Pfeiffer Vacuum PrismaPro QMA 250 F1, Перевод оригинала

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4
1
5
2
3
Fig. 28: Replacing the open ion source
1 Screw (3×)
(M1.6×5, slot, stainless steel, gold-plated)
4 Clamp for the filament unit (3×)
2 Nut (3×)
(rectangular)
5 Fixing screw of the ion source (3×)
(M2×3, crosshead, stainless steel, gold-plated)
3 Clamp for the ion source supply (3×)
Disassembling the ion source
1. Place the analyzer in the mounting aid.
2. Hold the clamps for the filament unit and the clamps for the ion source supply with the flat pliers.
3. Loosen the screws and nuts of the clamps without unscrewing the screws too far.
– The rear clamp will fall off if the screws are unscrewed too far.
4. Carefully bend the wiring away from the ion source using the flat pliers.
5. Loosen and remove the fixing screws of the ion source which secure the ion source to the quadru-
pole mass filter.
6. Carefully lift the ion source from the quadrupole rod system.
7. Inspect the ceramic insulators of the ion source wiring for damage.
Installing the ion source
1. Place the analyzer in the mounting aid.
2. Carefully remove the ion source from the transport packaging.
3. Carefully place the ion source onto the quadrupole rod system.
4. Fasten the fixing screws of the ion source which secure the ion source to the quadrupole mass
filter.
– Tightening torque:
0.40 Nm
5. Carefully bend the wiring away onto the ion source using the flat pliers.
6. Hold the clamps for the filament unit and the clamps for the ion source supply with the flat pliers.
7. Tighten the screws and nuts of the clamps.
– Tightening torque:
0.15 Nm
8. Check the wiring of filament and ion source.
9. Check the filaments and the ion source by way of resistance measurement.
Setting parameters in the operating software to 0 (zero)
► Set the pressure cut-off meter of the ion source to 0 (zero) in uCon with the command U204.
– Alternatively, enter "/mmsp/sensorIonSource/tPTripCount/set?0" in the web browser and con-
firm with Enter.
9.5.2 Replacing the cross beam ion source
NOTICE
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
upside down.
Maintenance
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