Installing the GC column 6-9
7. When the tip is in the correct position, tighten the 1/4-inch retaining
nut, taking care not to change the position of the transfer line and tip.
8. Fit the 1/16-inch nut and graphitized Vespel ferrule to the transfer line.
9. Remove the GC interface from the interface fitting tool.
Changing the position of the heater tube
To change the position of the heater tube:
1 Slacken the lock nuts on the three adjustment screws.
See also: Figure titled “GC interface tip:” on page 6-5.
2 Adjust the screws to position the tip centrally.
3 Tighten the lock nuts.
Installing the GC column
See also: The GC User Manual for more detailed information.
To install the GC column if it has not previously been fitted:
1. In the MassLynx Tune window, click Vacuum > Vent Source.
2. Wait for the Vacuum Status LED to display steady yellow.
3. Remove the 1/16-inch blanking nut from the GC interface.
4. Fit one end of the column into the GC injector.
Tip: The recommended position of the column in the GC injector is given
in the GC manufacturer’s instructions.
5. Remove the inner source.
See also: Changing the EI/CI inner source assembly on page 2-2 and
Changing the FI/FD inner source assembly on page 9-7.
Warning: To avoid contamination from samples wear,
chemical-resistant, powder-free gloves at all times when
handling the column.
Caution: Ensure that the helium supply is connected to the
GC.
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