Sample Conditioning System
Hardware Installation and Maintenance Manual 4
–7
4. Adjust the sample flow meter metering valves to the specified flows
for the measurement cells.
5. Confirm the sample flow and pressure setpoints and readjust the
metering valves and pressure regulator at the field pressure
reducing station to the specified setpoints, if necessary.
6. Confirm the sample bypass flow and readjust the bypass metering
valve to the specified setpoint, if necessary. The SCS is now
operating with the process sample.
7. Power up the analyzers according to the procedure given in
“Powering Up the Analyzer” in the Firmware Manual for your
analyzer.
8. After sufficient warm-up time, confirm that the sample system
enclosure is heated to the specified temperature (see Appendix A)
by observing the temperature reading on the door mounted
thermometer.
Shutting Down the SCS
The adjustment setpoints of the analyzer flow meters and
pressure regulators will be iterative and may require
readjustment multiple times 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. Contact Service if you are unable to
attain the specified sample flow rate (refer to “Service Contact”
on page B-31).
Allow the system a
minimum of 5 to 8 hours (preferably
overnight) to ensure stabilization. During this time, the system
will emit a variety of alarms - this is normal. Contact Service if the
alarms do not resolve themselves by the end of the warm-up
period, refer to “Service Contact” on page B-31.
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.
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