Thermo Scientific Prima PRO User Manual page 91

Maintenance
Dismantling and Cleaning Procedures
10-6 Prima PRO & Sentinel PRO Mass Spectrometers User Guide
1. Remove the ion source as previously described in the previous
section.
2. Disconnect the source wiring leads from the feed-through.
3. Remove the filaments as described in an earlier section titled
"Filament".
4. The source assembly is built on four ceramic rods secured by a
clamp.
Caution!
The electron beam collimating magnets are fixed to the

bracket at the top of the assembly nearest the connection ring.
These magnets should NOT be removed.
Care must be taken to prevent contact between magnetic

materials (e.g. a screwdriver) and the magnets.
These magnets have a high field strength but are very brittle

and easily damaged if subject to impact.
5. Disconnect all leads from the source assembly, not the
connection ring.
6. Remove the insulating rod clamp furthest from the connection
ring. See Figure 10–5.
Figure 10–5. Removing the insulating rod
7. Take careful note of the sequence and orientation of the
components. Detail changes to the exploded view below
10–6) may occur in special applications.
8. Remove the source component items in sequence.
Insulating rod clamp
furthest from connection
ring
Thermo Fisher Scientific
(Figure