Replacing The Cross Beam Ion Source; Fig. 28: Replacing The Open Ion Source - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

Maintenance
4
3
2
1
Fig. 28:
1 Screw (3×)
2 Nut (3×)
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.
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-
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
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.
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.
9.5.2 Replacing the cross beam ion source
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
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Replacing the open ion source
(M1.6×5, slot, stainless steel, gold-plated)
(rectangular)
– The rear clamp will fall off if the screws are unscrewed too far.
pole mass filter.
filter.
– Tightening torque: 0.40 Nm
– Tightening torque: 0.15 Nm
– Alternatively, enter "/mmsp/sensorIonSource/tPTripCount/set?0" in the web browser and con-
firm with Enter.
upside down.
5
4 Clamp for the filament unit (3×)
5 Fixing screw of the ion source (3×)
(M2×3, crosshead, stainless steel, gold-plated)
NOTICE