Teledyne GC-Pro/TCD - Gas Chromatograph - Manual (Page 45)

GC-Pro TCD Installation
Teledyne Analytical Instruments 31
Consult the assembly, piping, outline drawings, and any
Addenda included with this manual to determine if special
conditions apply.
3.3.3.1 E FFLUENT
All the gases introduced into the detection cell vent from one fitting
at the rear of the analyzer. TAI recommends that the cell be permitted to
vent directly to the atmosphere wherever possible.
If optional features such as an FID detector are installed, a vent line
is required. With this option the installation must include a drop-out pot
to collect the water that is formed by the burning of the hydrogen or
other fuel.
Any vent line must be constructed so that water and dirt cannot
collect in it.
3.3.3.2 S ENSOR V ENT
The sensor vents through a separate vent at atmospheric pressure.
This vent may contain water and so any connection made to the port
must slope downwards for proper liquid removal. Never allow the vent
to clog or fill with liquid. It must be free-flowing and be without kinks
or obstructions.
3.3.3.3 C ARRIER G AS C ONNECTION
The carrier gas supply is also used as the reference gas for the TC
sensor. The specific gas used is application dependant and is listed in the
Addendum and Testing Results section of Appendix C.
The carrier gas should be supplied at 80 psig. Make the
carrier/reference gas connection according to the gas connection
diagram included at the back of this manual.
3.3.4 Sample and Span Gas Connections
The sample and span gas connections are made at the rear panel. If
the optional auto calibration module is installed, the sample and span gas
will connect to this module. If no auto calibration module is present,
these gases connect to the labeled fittings on the rear panel.
Set the supply pressure for sample and span gas to 20 psig.