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Caution
When inserting the direct-to-column tube
through the oven, leave the protective cap in
place to prevent insulation from clogging the
tubing.
3. Insert the direct-tube assembly through the
hole in the oven. Clean off any insulation
stuck to the tubing or protective cap.
4. Loosely connect the tube to the sampling
valve at port 1. Tighten 1/4 turn past finger
tight. Install the screw and washer (removed
under "Disconnect the existing inject line"
above) through the direct-tube assembly coil
and secure it to the valve heated block.
Released: April 2004
5. Remove the protective cap from the valve fit-
6. Remove the plastic cap from the other end of
6850 Series Gas Chromatograph Service Procedures
ting on the direct-tube assembly and install it
onto the open end of the inject line to the
inlet.
the tube.
Caution
Do not use a stainless steel ferrule. Once
installed, you will not be able to remove it,
and you will have to cut the direct-tube
assembly to change to a different diameter
column.
74
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