Thermo Scientific FOCUS GC, Instruction Manual

Page: 99 / 356

Chapter 5
S/SL Overview Split/Splitless Injector (S/SL)
Instruction Manual 99
OPERATING SEQUENCE
Installing a Liner and a Septum
Materials required:
• liner
• septum
• tweezers
• graphite seal
• liner cap wrench (included with the GC)
NOTE
T
he injector fittings may be hot.
This sequence must be performed with the injector at working temperature.
1. Choose the correct liner for your application (see Table 5-1). Slide a graphite
seal onto the liner from the bottom (the bevelled end) and push it to
approximately 8–10 mm from top (the flat end).
CAUTION Be careful not to break the graphite or to allow graphite to enter the liner.
2. Hold the top of the liner with tweezers. Lower it, bevelled end first, into the
injector. The liner should rest on the terminal fitting at the bottom of the
injector.
3. Hold the top of the liner with tweezers. Lower it, bevelled end first, into the
injector. The liner should rest on the terminal fitting at the bottom of the
injector.
4. Insert the liner cap and secure it with the liner cap wrench. The liner cap must
be screwed down tight enough to ensure a good seal between the liner and the
injector body.
5. Place the septum support in the injector. The septum support must lie flush
with the top of the injector. If not, the liner cap may not be tight enough.