Thermo Scientific FOCUS GC, Instruction Manual

Page: 136 / 356

Chapter 7
Column
Installation
136 Instruction Manual
9. Conduct a leak check of the column installation, as described in the paragraph
Keeping Leaks Under Control on page 146.
Connecting to a FID Detector
It is a good practice, before connecting the column to the detector, to perform a
manual leak check as described in the
Manual Checking for Leaks operating
sequence.
Before beginning this sequence, remove the detector from the detector base body.
WARNING! The metal capillary column must never touch the tip of the jet. Contact of the metal
column with the electrically charged tip can cause electrical shock and damage to
the instrument.
Materials required
• M4 column retaining nut
• graphite ferrule
• 6 mm wrench
• typewriter correction fluid, or felt-tipped pen
1. Slide the graphite ferrule onto the capillary column with the beveled end
facing the detector base body. Be careful to avoid damaging the graphite
ferrule when inserting the column.
2. Cut 2–3 cm from the column end.
3. Use the typewriter correction fluid, or felt-tipped pen to mark the column
80-85 mm from the column end.
4. Gently insert the column into the detector base body. Use the mark as a guide
to determine how far to insert the column.
5. Slide the ferrule up to the detector base body. Slide the M4 nut onto the
column through its side cut. Finger-tighten the column retaining nut until it
starts to grip the column.
WARNING! Do not push the column through the detector jet because, with the detector in place,
the tip of the jet is polarized to high voltage.