Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 27)

Model 9110EH Instruction Manual Getting Started
3.3. Pneumatic Connections
Sample and calibration gases should only come into contact with PTFE (Teflon), FEP, glass
or stainless steel materials. Figure 3-5 and Figure 3-6 illustrate the most common
configurations for gas supply and exhaust lines to the Model 9110EH Analyzer. Appendix D
contains more detailed pneumatic flow diagrams for the analyzer and its various
(pneumatically related) options.
CAUTION
To prevent dust from getting into the analyzer, it was shipped with small plugs
inserted into each of the pneumatic fittings on the rear panel. Make sure that all
dust plugs are removed before attaching exhaust and supply gas lines.
Please refer to Figure 3-3 for pneumatic connections at the rear panel and Table 3-1 for
nomenclature.
Table 3-1: Inlet / Outlet Connector Nomenclature
Rear Panel Label Function
Sample
Connects the sample gas to the analyzer. When operating the analyzer
without zero span option, this is also the inlet for any calibration gases.
Exhaust Connects the exhaust of the analyzer with the external vacuum pump.
Span
On Units with zero/span valve or IZS option installed, this port
connects the external calibration gas to the analyzer.
Zero Air
On Units with zero/span valve or IZS option installed, this port
connects the zero air gas or the zero air cartridge to the analyzer.
• Attach a sample inlet line to the sample inlet port. Ideally, the pressure of the
sample gas should be equal to ambient atmospheric pressure.
• In applications where the sample gas is received from a pressurized manifold, a vent
must be provided to equalize the sample gas with ambient atmospheric pressure
before it enters the analyzer. The vented gas needs to be routed outside the imme-
diate area or shelter surrounding the instrument.
CAUTION
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.
CAUTION
The exhaust from the external pump needs to be vented outside the
immediate area or shelter surrounding the instrument using a
maximum of 10 meters of 1/4” PTFE tubing.
M9110EH Rev 0 13