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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).
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 Wh
ee
l
Hous
ing
SAMPLE
CHAMBER
GFC M
o
tor
He
at Sy
nc
Purg
e Gas
F
low
C
o
nt
ro
l
Ext
e
rn
al CO2
Sc
rub
ber
(O
pt
io
n
53
0n
ly
)
Figure 5-3:
Internal Pneumatic Flow – Ambient Zero/Ambient Span