Teledyne T300, Operation Manual, Page: 74 / 426

Getting Started Teledyne API – Model T300/T300M CO Analyzer
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3.3.2.9. PNEUMATIC CONNECTIONS FOR ZERO SCRUBBER/AMBIENT SPAN OPTION
Option 50H is operationally and pneumatically similar to Option 50A described earlier,
except that the zero air is generated by an internal zero air scrubber. This means that the
IZS inlet can simply be left open to ambient air.
Internal zero/span and sample/cal valves control the flow of gas through the instrument,
but because the generator and calibrator limit the flow of zero air and span gas no
shutoff valves are required.
See Figure 3-4 for the location of gas inlets and outlets and span gas no shutoff valves
are required.
PRESSURE SPAN
ZERO AIR
SAMPLE
EXHAUST
VENT SPAN
Source of
SAMPLE GAS
Removed during
calibration
Calibrated
CO Gas
at span gas
concentration
VENT
here if input
is pressurized
Model 700 gas
Dilution
Calibrator
VENT
Instrument
Chassis
Figure 3-27: Pneumatic Connections – Option 50H: Zero/Span Calibration Valves
S
AMPLE
G
AS
S
OURCE
Attach a sample inlet line to the sample inlet port. The SAMPLE input line should not
be more than 2 meters long.
•
Maximum pressure of any gas at the sample inlet should not exceed 1.5 in-Hg
above ambient pressure and ideally should equal ambient atmospheric pressure.
•
In applications where the sample gas is received from a pressurized manifold, a
vent must be placed on the sample gas before it enters the analyzer.
06864B DCN6314