Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 85

Replace the O-Ring
8. Screw and tighten the seal holder onto its
housing.
CAUTION Tightening of the seal holder
must be performed carefully in
order to properly seal the On-
Column needle guide. Because
of the tightening, the Viton O-
Ring expands into its seat and
closes the needle path, sealing
the On-Column injector.
With the injection valve on the
open position, use an
appropriate syringe (needle 80-
mm long) to verify that the
needle freely slides inside the
injector.
WARNING! Please verify that the syringe
needle, due to the friction
exercised against the
compressed O-Ring seal, enters
with a reasonable applied force
into the On-Column injector
port. The needle must enter with
some noticeable effort, but
smoothly, and must not be bent
by the force applied, in order to
avoid needle jamming during
automated injections. If the
needle tends to bend, loosen
and tighten again the seal
holder until it is properly
tightened.
9. Reposition the injector/detector cover.
Maintenance and Troubleshooting Manual
Maintaining a Cold On-Column Injector for Standard Automatic Injections
Chapter 4
85