
Chapter 6: Shutdown and Maintenance 207
4 Ensure that a cone-shaped ferrule is attached to the sample line.
Figure 6-11 on page 206 shows an example of a ferrule. If the ferrule was
left behind in the injection chamber fitting, gently push the tip of the
ferrule-removal tool (included in the accessory kit) into the top of the
ferrule and pull the ferrule straight out. See Figure 6-12.
After using the tool, you might need to replace the ferrule. If the ferrule is
damaged, replace it with a spare (included in the accessory kit).
Figure 6-12 Ferrule tool
5 Slide the ferrule and nut off the end of the sample line.
6 Slide the nut and then the ferrule onto the end of the new sample tubing.
Leave approximately 5 inches (12.7 cm) of tubing extending out of the
sample injection chamber end. (This length can be adjusted depending on
the depth of your sample tube.) This length is referred to as the pilot, as
shown in Figure 6-13 on page 207.
Figure 6-13 Components of a compression fitting
7 Insert the pilot tubing into its fitting, ensuring that the tubing reaches the
intended pilot depth.
Do not to bend the primary sample line during insertion.
External View Internal View
ferrule
tubing
pilot
length
pilot depth
ferrule
pilot length
tubing
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