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Getting Started Teledyne API – Model T300/T300M CO Analyzer
72
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 g
as no shutoff valves
are required.
Figure 3-27: Pneumatic Connections – Option 50H: Zero/Span Calibration Valves
SAMPLE GAS SOURCE
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