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Model 9110TH NOx Analyzer Getting Started
Teledyne Analytical Instruments 67
Figure 3-24: Gas Line Connection w/Ambient Zero/Pressurized Span Valves (OPT 50B)
SAMPLE GAS SOURCE
Attach a sample inlet line to the SAMPLE inlet fitting.
Use PTFE tubing; minimum O.D ¼”.
Sample Gas pressure must equal ambient atmospheric pressure (29.92 in-Hg).
In applications where the sample gas is received from a pressurized manifold, a vent must be
placed on the sample gas line. This vent line must be:
No more than 10 meters long.
Vented outside the shelter or immediate area surrounding the instrument.
CALIBRATION GAS SOURCES
SPAN GAS Attach a gas line from the pressurized source of calibration gas (e.g. a
bottle of NISTSRM gas) to the SPAN1 inlet.. Use PTFE tubing;
minimum O.D ¼”.
ZERO AIR (the dual-stage zero Air Scrubber makes zero air)
VENTING
Attach a line to the SPAN2/VENT outlet. It should be:
¼” PTFE tubing.