BA02191C SS2100 H
2
S TDLAS Gas Analyzer
Endress+Hauser 4-7
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 for the H
2
S
analyzer in “Powering Up the Analyzer” in the Description of
Device Parameters 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
To isolate the measurement cell for short-term shutdown
The analyzer can be isolated from the primary sample bypass section for short-
term shutdown or maintenance of the analyzer while allowing the sample
bypass flow to continue in a steady-state mode.
Allow the system a minimum of 5-8 hours (preferably
overnight) to ensure stabilization. During this time, the system
will emit a variety of alarms — this is normal. If the alarms do not
resolve themselves by the end of the warm-up period, contact
“Service” on page B-25.
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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