Sri 8610C User manual

Replacing the TID bead on
SRI 8610C and 310C GCs
The TID detector is mounted on
the right side of the GC’s column
oven.
Use a phillip head screwdriver to
remove the screw holding the insu-
lation cover.
Remove the aluminum cover. Be
sure the detector is cool before
touching.
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Replacing the TID bead on
SRI 8610C and 310C GCs
Remove the insulation carefully to
avoid breaking off any.
Use a 9/16” wrench to remove the
collector electrode. Note how far
the white alumina insulation pro-
trudes from the back of the nut.
It’s a good idea to make a magic
maker line on the alumina before
removing.
Remove the collector electrode
from the detector.
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Replacing the TID bead on
SRI 8610C and 310C GCs
Unplug the TID from the push ter-
minals.
Use a 7/16” wrench to loosen the
detector body from the bulkhead
fitting.
Slide the detector body out of the
bulkhead fitting.
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Replacing the TID bead on
SRI 8610C and 310C GCs
Remove the detector cap so you
can see better inside the detector
body.
When you look inside the detector
body you will see the bead posi-
tioned directly in front of the jet.
Remove the old bead carefully. It
is a ceramic, so it can break if bent
or banged.
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jet

Replacing the TID bead on
SRI 8610C and 310C GCs
Insert the new bead carefully using
a new 1/4” soft graphite ferrule if
the old ferrule has been overtight-
ened.
Re-assemble the detector.
Set the operating voltage to –300
( bead volts ). Sometimes the op-
erating voltage may have been
raised on the old bead to compen-
sate for reduced sensitivity.
Make sure the collector electrode
is not too close to the bead. The
end of the collector electode
should just be visible when looking
down from the top.
Be sure not to hit the bead
with the column. This can
happen of the column is in-
serted too far.
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Position the bead in
front of the jet when
you re-insert it.
Wrong Correct