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FAQ Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 56
The minimum span gas flow rate required for this option is 800 cm
3
/min.
The state of the zero/span valves can also be controlled:
Manually from the analyzer’s front panel by using the SIGNAL I/O controls located under the DIAG
Menu (Section 6.13.2),
By activating the instrument’s AutoCal feature (Section 7.6),
Remotely by using the external digital control inputs (Sections 6.15.1.2 and 7.5.2), or
Remotely through the RS-232/485 serial I/O ports (see Appendix A-6).
GFC Wheel
Housing
SAMPLE CHAMBER
GFC Motor
Heat Sync
Purge Gas
Flow Control
External CO2
Scrubber
(Option 53 0nly)
Figure 5-3: Internal Pneumatic Flow – Ambient Zero/Ambient Span