Maintenance
Dismantling and Cleaning Procedures
Thermo Fisher Scientific
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
10-5
Note:
The anodized aluminium insulating plate is left in place.
This must be reused or replaced when replacing the filament.
To
replace
the filament, proceed as follows.
1.
Position the filament as shown in
with the knurled nut.
Note:
The alignment of the filament in the plane of the ion
beam is preset.
2.
Reconnect the supply leads (socket connectors shown in
).
3.
Check the filament connections for continuity.
4.
Check the filament to ion source and trap to ion source and
ensure these are open circuit (> 50 M
).
5.
Refit the source connection ring in the analyser housing and
secure with 3 x M3 cap head screws. A dowel pin in the analyser
housing ensures the correct orientation.
6.
Refit the source flange and tighten the M6 nuts evenly.
Caution!
This operation should only be undertaken by trained
personnel with knowledge of the requirements for the
cleanliness of vacuum components.
This operation should ONLY be performed in a dust free,
clean environment. Failure to observe this requirement could
result in contamination of the assembly with particulates, and
/ or materials, which could degrade or prevent subsequent
operation of the source.
Magnetic particulates will easily attach to the collimating
magnets and will be very difficult to remove.
To
dismantle
the ion source, follow the procedure below.
Ion Source
