Varian 450-GC, User Manual

Page: 44 / 205

Installation
Varian, Inc. User Manual 450-GC Page: 25
•
Place the column into the base of the detector.
•
Turn the capillary column nut and ferrule finger-tight.
•
Gently slide the column into the detector until the mark on the column
aligns with the bottom edge of the column nut.
•
Continue to hold the column as you tighten the nut just enough to hold the
column firmly in place and to create a good seal.
Connect Metal Packed Column to Detector
After the column has been conditioned, follow the steps below to connect your
metal packed column to the detector. Note that the appropriate packed column
adapter must be installed.
Hot surfaces are exposed
•
If using a detector other than TCD, locate the packed column detector
adapter in the Packed Column Kit and install on the inlet to the detector.
The TCD inlet is designed for packed column installation.
•
Insert the open end of the packed column into the detector inlet or adapter
and push until it reaches a stop.
•
Hold the column in place and finger-tighten the column nut. Then, using 2
7/16
″
wrenches, tighten 3/4-turn past finger-tight. On subsequent
installations, tighten the nut 1/4 to 1/2-turn past finger-tight.
Check for Leaks
Inspect your GC system for leaks before heating. An electronic leak detector is
the most reliable method to check the Injector and detector fittings for carrier
gas leaks.
Never use soaps, such as Snoop®. These may cont aminate the
system and cause permanent damage to capillary columns. If a
liquid leak detector is desired, try a 50/50 mixture of
isopropanol/water.