5.
While holding the column with the column gripping tool, tighten the column onto the
compression fitting.
Figure 2–5: Tightening the column onto the compression fitting
Compression fitting
Column gripping tool
Column
Tip:
If you are operating the system at, or close to, its maximum system operating
pressure limit and the fitting is a hex, use the 1/2-inch open-end wrench to tighten the
compression fitting an additional 1/8- to 1/6-turn.
6.
Tighten the cap nut onto the compression fitting.
Tip:
When reinstalling the fitting:
• Examine the PEEK ferrule for damage and replace it if necessary. For instructions on
replacing the PEEK ferrule, see
Replacing the ferrule on the column-inlet fitting
• Always loosen the locking cap nut before reconnecting the fitting.
2.5.1.12 Replacing the ferrule on the column-inlet fitting
Replace the column-inlet ferrule on the APH assembly fitting if the column is leaking or the ferrule
looks damaged.
Warning:
To prevent burn injuries, set the column temperature to Off, and then allow
the column compartment and its components to cool for 60 minutes before touching
them. Monitor the column compartment's internal temperature to ensure that all
components are cool.
Warning:
To avoid personal contamination with biologically hazardous, toxic, and corrosive
materials, wear chemical-resistant, powder-free gloves when performing this procedure.
Warning:
To avoid eye injury, use eye protection when performing this procedure.
April 4, 2018, 715005702 Rev. A
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