Getting Started Model 300E Carbon Monoxide Analyzer
Instruction Manual
28 P/N 04288 REV: A
Table 3–1: Inlet Outlet Nomenclature
Rear Panel Label Function
Sample
Connect a gas line from the source of Sample Gas here.
Calibration gasses are also inlet here on units without
Zero/Span/Shutoff Valve Options installed.
Exhaust Connect an exhaust gas line of not more than 10 meters long here.
Pressure Span
On Units with Zero/Span/Shutoff Valve Options installed, connect a
gas line to the source of Calibrated Span Gas here.
Vent Span
Span Gas vent outlet for units with Zero/Span/Shutoff Valve Options
installed.
Connect an exhaust gas line of not more than 10 meters long here.
IZS
Internal Zero air Scrubber.
On units with Zero/Span/Shutoff Valve Options installed but NO
internal Zero Air Scrubber attach a gas line to the source of Zero Air
here.
2. Attach a sample inlet line to the sample inlet port. Ideally, the pressure of the
sample gas should be at ambient pressure (0 psig).
q The SAMPLE input line should not be more than 2 meters long.
q Figure 3-3 depicts the pneumatic flow for this analyzer in its basic
configuration.
q Figure 3-4 depicts the pneumatic flow for this analyzer with various
Zero/Span/Shutoff Valve Options attached.
CAUTION
Maximum pressure over ambient should not exceed 1.5 in-Hg.
3. The exhaust from the pump and vent lines should be vented to atmospheric
pressure using maximum of 10 meters of ¼” PTEF tubing. Venting should be
outside the shelter or immediate area surrounding the instrument.
CAUTION
Venting should be outside the shelter or immediate area surrounding
the instrument and conform to all safety requirements regarding
exposure to CO.
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