Waters GCT Premier Operator's Manual page 238

FI emitter:
Emitter wire
4. Carefully hold the FI inner source on its side and carefully install the
emitter bead into the end of the probe.
5. Use the tweezers to gently touch the ceramic bead pushing the emitter
onto the probe, taking care not to touch the emitter wire.
6. Wind the threaded inner source probe stop counterclockwise until it
reaches the end.
You only need to set the depth stop rings the first time you insert
Note:
the inner source probe. Once the depth stop rings have been set, you can
lock the depth stop rings to retain the position for future use.
Rational:
into the source and hitting the extraction rods.
7. Carefully insert the FI inner source into the outer source.
See also:
8. Ensure that the emitter is more than 5 mm away from the extraction
rods. Use the clear viewing port on the top of the source lid.
9. Adjust the depth stop rings to push the probe until the emitter is in the
correct position. This is normally approximately 2 mm.
10. Lock the depth stop rings to retain the position for future use.
10-34 Routine Maintenance
Ceramic bead
This prevents the inner source probe from being pushed too far
Inserting the FI/FD inner source probe on page
Legs
9-11.