Installation
Hardware Installation and Maintenance Manual 3
–19
Connecting the Gas Lines
Once you have verified that the analyzer is properly wired, you are ready to
connect the sample supply and sample return. Consult the layout and flow
diagrams in Appendix A for guidance. All work must be performed by
technicians qualified in instrument tubing. SpectraSensors recommends using
1/4” O.D x 0.035” wall thickness, seamless stainless steel tubing.
Toconnectthesamplesupplyline
1. First, confirm that the sample probe is correctly installed at the
process supply tap and that the sample probe isolation valve is
closed.
2. Also confirm that the field pressure reducing station is installed
properly at the sample probe and that the pressure regulator at the
field pressure reducing station is closed (adjustment knob turned
fully counter-clockwise).
3. Check that the relief valve vent line is properly installed from the
field pressure reducing station to the low pressure flare or
atmospheric vent connection.
4. Determine appropriate tubing route from the field pressure reducing
station to the SCS.
5. Run stainless steel tubing from the field pressure reducing station to
the sample supply port of the SCS. Bend tubing using industrial
grade benders, check tubing fit to ensure proper seating between
the tubing and fittings. Fully ream all tubing ends. Blow out the lines
for 10
–15 seconds with clean, dry nitrogen or air prior to making the
connection.
Process samples may contain hazardous material in potentially
flammable and/or toxic concentrations. Personnel should have a
thorough knowledge and understanding of the physical properties
and safety precautions for the sample contents before installing
the SCS.
The process sample at the sample tap may be at a high pressure.
Use extreme caution when operating the sample probe isolation
valve and field pressure reducing regulator.
All valves, regulators, switches, etc. should be operated in
accordance with site lock-out/tag-out procedures.
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