Automatic Liquid Sampler and Injector
The 6850 automatic injector
Released: March 2004 6850 Series II GC User Information page 237 of 256
Figure 49. Turret removal
3. Rotate the turret so that the open section faces the back of the tower and
the arrow on top of the turret points directly back (see Figure 49). Push
the stripper arm toward the back, then lift the turret up so that it clears the
center shaft.
4. To install the replacement turret, align the tab on the motor hub with the
slot in the underside of the turret.
5. Push the stripper arm to the back of the tower, insert the turret with the
open section facing the back of the tower and the arrow pointing back,
and install the turret with the tab seated in the slot. Seat the turret on the
hub, rotating it gently if necessary until it drops completely into position.
The top of the threaded shaft should be almost level with the top of the
turret.
6. Replace the knurled nut and tighten it firmly (finger-tight).
7. Close the injector door.
8. Plug the injector cable into the GC and check for the Ready light.
For increased accuracy of the needle sampling depth, perform the turret
alignment procedure each time the turret is changed. See “Aligning the turret”
on page 237.
Aligning the turret
If you changed turrets in the injector and desire increased needle sampling
depth accuracy, or if the Align Mode light is on, perform this alignment
procedure. When the Align Mode light is on, the injector will not operate until
this procedure has been performed.
Knurled nut
Turret
Alignment arrow
Stripper arm
Motor hub
tab
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