Installing the GC 1
Agilent 7890B Installation 29
When two detectors use the same gases, we recommend using a
Tee fitting. Shutoff valves are not required. Use the supplied
Tees or assemble Tees as shown below.
Figure 11 Tee for detector flow module
TCD connections The carrier gas and reference gas must come
from the same source. Because of the close spacing of the EPC
modules, the simplest way to do this is to attach lengths of
tubing to each input to bring the ends outside the back panel,
then join them with a Tee.
Side panel detector connections If the GC is equipped with a
side-mounted TCD or ÎĽECD, attach the carrier gas to the single
gas connection at the back of the side mount enclosure. (For
TCD, an internal Tee feeds the reference gas or input.)
75 mm = ~ 3 inches
107 mm = ~ 4 1/4 inches
60 mm = ~ 2 1/4 inches
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