Replacing The Grid Ion Source - Pfeiffer Vacuum PrismaPro QMG 250 Translation Of The Original

Maintenance
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.
5. Attach the wiring to the filament unit and the ion source.
6. Hold the clamps and connections with the flat pliers.
7. Fasten the screws of the filament unit and the ion source wiring.
8. Secure the support spring.
9. Check the wiring of filament and ion source.
10. 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.
9.5.3 Replacing the grid 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
Prerequisite
● PrismaPro deactivated
Required tools
● Flat screwdriver, 1.5 mm
● Flat screwdriver, 3 mm
● Crosshead screwdriver, Philips #1
● Torque wrench
● Flat pliers
Required aid
● Mounting aid for the analyzer
Required spare parts
● Grid ion source with tungsten filaments
● If necessary, set of parts PT 163 534 for the replacement of screws, nuts or clamps
56/86
– 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.
NOTICE