5
Routine and Preventive Maintenance
Maintaining the ESI Probe
Thermo Scientific
Surveyor MSQ Plus Hardware Manual
65
4. Depending on whether the capillary protrudes from the tip of the probe, do one of the
following:
• If the capillary protrudes from the probe tip, go to
• If the capillary does not protrude from the tip of the probe, turn the probe
upside-down and gently shake the capillary assembly out of the probe. Adjust the
position of the graphite ferrule so that it is closer to the end of the PEEK insert, and
repeat
and
of this procedure. Continue to adjust the position of the
graphite ferrule until the capillary protrudes from the tip of the probe when you
insert the capillary assembly into the probe.
5. Screw the capillary retaining nut (adaptor) into the ESI probe until finger tight, and then
visually check that the capillary protrudes from the probe tip.
shows the capillary protruding from the probe tip.
Figure 46.
View of the ESI probe with the capillary retaining nut screwed in finger tight
6. Using the probe clamp, tighten the capillary retaining nut by one-half turn. Do not
overtighten the nut. Overtightening the nut can cause solvent leakage.
7. Finish reassembling the ESI probe:
a. Place the locking plate and probe clamp in position.
b. Insert the M3 × 10 cap head stainless steel screw (P/N FM103046) and tighten with
the 2.5 mm Allen key.
The capillary must protrude from the probe tip. In addition to visually checking the
protrusion depth of the capillary, you can use the ESI spacer plate. The ESI spacer
plate is 0.64 mm thick. If you can see or feel the capillary protruding through the
hole in the center of the plate, the capillary protrudes from the probe tip by more
than 0.64 mm.
8. (Optional) Using the ESI spacer plate, confirm that the capillary protrudes from the tip
of the probe.
shows the ESI spacer being used to check the protrusion depth of the capillary.
ESI probe mount
Capillary
retaining nut
Capillary protruding
from the ESI probe tip
