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Calibration Procedures
Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments
167
Source of
SAMPLE GAS
Removed during
calibration
VENT
Calibrated
CO
2
Gas
at span gas
concentration
VENT
here if input
is pressurized
Chassis
PRESSURE SPAN
IZS
PURGE LINE
SAMPLE
EXHAUST
VENT SPAN
External
Zero Air
Scrubber
N
2
Figure 7-4:
Pneumatic Connections – Ambient Zero/Pressurized Span Valves and External
Zero Air Scrubber
Figure 7-5:
Pneumatic Connections – Ambient Zero/Ambient Span Valves