Agilent Technologies 6850 Series II - Page 179

Routine Maintenance: Inlets
Maintaining a cool on-column inlet
Released: March 2004 6850 Series II GC User Information page 179 of 256
5. If you have a cooling tower assembly installed:
Remove the assembly by grasping it and turning counterclockwise. The
septum is underneath the cooling tower inside the spring. The spring and
septum may pop out of the inlet when you remove the cooling tower. Be
careful not to lose them. If they do not pop out, use a thin wire to remove
them from the inlet.
6. If you have a septum nut installed:
Remove the septum nut by grasping the knurling and turning counter-
clockwise. The septum is probably attached to the septum nut. The spring
may also pop out when you remove the septum nut. Be careful not to lose
it.
7. Insert the narrow wire (or a piece of capillary column) into the inlet
through the oven, and push the insert and spring (if they did not come out
previously) out through the top of the inlet.
Cooling tower assembly
Spring
Duckbill septum
Septum nut
(250- and 320-mm
columns)
Septum
Spring
Septum nut
(530-mm columns)
Septum
Spring
Spring
Insert (varies according
to column use)
Insert wire into inlet from oven