Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 74)

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 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
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rn
al CO2
Sc
rub
ber
(O
pt
io
n
53
0n
ly
)
Figure 5-3: Internal Pneumatic Flow – Ambient Zero/Ambient Span