Teledyne GC-Pro/TCD - Gas Chromatograph - Manual (Page 52)

Operation GC-Pro TCD
Teledyne Analytical Instruments 38
4.4 Activating the Support Gases
The instrument gas controls are located on the front panel adjacent to
the touch screen display as shown in Figure 1-1. Make sure that the
following support gases are available at the analyzer:
 Carrier gas: (usually nitrogen but refer to Appendix C for
your specific application.
 Span gas: Typically 70-90% of measured component on
the range of interest in a clean background gas.
Refer to Appendix C for the specific span gas
composition for your application.
4.4.1 Carrier Gas
Set the carrier gas source regulator to 80 psig and adjust the analyzer
sample regulator until the sample pressure gauge reads the
recommended sample pressure of 7.0 psig.
4.4.2 Span Gas
1. Feed span gas to the analyzer (see Section 4.4.2). Gas switching
can be performed manually or handled through the auto
calibration valves (if the option is added). See Section 4.5.10.3.
2. Observe that the analyzer sample flow meter reads from 0.3 to
1.0 SCFH.
3. Turn off span gas.
4.5 Analyzer Operation
Although the GC-Pro TCD has been programmed for your
application at the factory, it can be further configured at the operator
level. Depending on the specifics of the application, this might include
all or a set of the following procedures:
1. Setting system parameters
 Establish a security password, if desired, requiring operator
to log in.
 Establish and start an automatic calibration cycle (if equipped
with the optional auto calibration module).
2. Routine operation.