Sample Conditioning System
Hardware Installation and Maintenance Manual 4
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5. Confirm the sample flow and pressure setpoints and re-adjust the
control valve(s) and pressure regulator to the specified setpoints, if
necessary.
6. Confirm the sample bypass flow and re-adjust the control valve to
the specified setpoint, if necessary. The SCS is now operating with
the process sample.
7. Power up the analyzer according to the procedure given under
“Powering Up the Analyzer” in the Firmware Operator’s Manual.
8. After sufficient warm-up time, if applicable, confirm that the sample
system enclosure is heated to the specified temperature by
observing the temperature reading on the analyzer display.
Shutting Down the SCS
Situations may occur that require the shutdown of some or all of the SCS.
These circumstances may include short-term shutdown for repairs or parts
replacements, for example, or a long-term shutdown of the system for packing
and storing.
The adjustment setpoints of the analyzer flowmeters and
pressure regulators will be iterative and may require multiple
adjustments until the final setpoints are obtained.
The analyzer system has been designed for the sample flow rate
specified. A lower than specified sample flow rate may adversely
affect analyzer performance. If you are unable to attain the
specified sample flow rate, refer to “Service Contact” on page
B-23.
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 operating
the SCS.
The process sample at the sample tap is at a high pressure. A
pressure reducing regulator is located at the sample tap to reduce
the sample pressure and enable operation of the SCS at a low
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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