Thermo Scientific FOCUS GC, Instruction Manual

Page: 135 / 356

Chapter 7
Installation Column
Instruction Manual 135
8. Use the 6 mm wrench to tighten the retaining nut using no more pressure than
is necessary to obtain a good seal (1/4 to 1/2 turn).
9. Conduct a leak check of the column installation, as described in the paragraph
Keeping Leaks Under Control on page 146.
Connecting to an PPKD Injector
Before connecting the column, make sure the injector has been properly
assembled and programmed and the column support has been installed in the GC
oven. For more information about Purged Packed injectors, refer to Chapter 6
Purged Packed Column Injector (PPKD) .
Materials required:
• M4 column retaining nut
• graphite ferrule
• 6 mm wrench
1. Slide the graphite ferrule onto the wide-bore column with the bevelled end
facing the injector. Be careful to avoid damaging the graphite ferrule when
inserting the column.
2. Cut 1 cm from the column end.
3. Place the column on the column support.
4. Insert the column into the injector and slide the ferrule up to the injector base
as far as possible.
5. Slide the M4 retaining nut onto the column through its side cut.
6. Finger-tighten the column retaining nut until it starts to grip the column.
7. Adjust the column position so that its end rests against the bottom of the liner.
8. Use the 6 mm wrench to tighten the retaining nut. Use no more pressure than
is necessary to obtain a good seal (1/4 to 1/2 turn).