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Getting Started Teledyne API – Model T300/T300M CO Analyzer
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3.3.2.10. PNEUMATIC LAYOUT FOR ZERO SCRUBBER/ AMBIENT SPAN OPTION
Figure 3-28: Internal Pneumatic Flow OPT 50H – Zero Scrubber/Ambient Span
Table 3-11: Zero/Span Valve Operating States for Option 50H
MODE VALVE CONDITION
Sample/Cal Open to SAMPLE inlet
SAMPLE
(Normal
State)
Zero/Span Open to ZERO AIR scrubber
Sample/Cal Open to ZERO/SPAN valve
ZERO CAL
Zero/Span Open to ZERO AIR scrubber
Sample/Cal Open to ZERO/SPAN valve
SPAN CAL
Zero/Span Open to PRESSURE SPAN inlet
3.3.2.11. CALIBRATION GASES
Zero air and span gas are required for accurate calibration.
Z
ERO AIR
Zero air is a gas that is similar in chemical composition to the earth’s atmosphere but
scrubbed of all components that might affect the analyzer’s readings, in this case CO
and water vapor. If your analyzer is equipped with an Internal Zero Span (IZS) or an
external zero air scrubber option, it is capable of creating zero air.
06864B DCN6314