Emerson Rosemount 700XA Reference Manual page 68

5. Run MON2020 and connect to the GC.
Configure analytical train
Use the Analytical Train Configuration window for multiple analysis clocks to assign the valve, digital outputs (DO), and detectors to
each train and then assign each train to its respective analysis clock.
Procedure
1. Assign the usage of valves and DO to Analyzer# on Hardware → Valves, Hardware → Detectors and Hardware → Discrete
Outputs screens.
2. Open the Application → Analytical Train Configuration screen.
3. Click Discrete Output and Valves. Assign the respective DOs, valves, and detectors to each analytical train.
The valves and DOs are assigned with Usage as Analyzer# displayed on this screen. All available detectors are also displayed
on this screen. You cannot configure the same detector, valve or DO to multiple trains.
4. On the Application → Timed Event screen, filter the configured events as per train selection by selecting the Train#
checkbox.
Configure analysis clock
Use this feature to configure a single analysis or multiple analyses.
One analysis can be considered as one virtual gas chromatograph (G) that has independent Sample Loop, Analytical Path, and Timed
Event tables.
Multiple analyses can run independently to analyze multiple streams at the same time. The number of analyses are set at factory
per the mechanical configurations.
Mechanical
configurations
Trains 1 - 6
Default Stream Sequence Sets the default sequence to be used by the indicated analysis during auto-sequencing. To create a
Purge Duration
Energy Value Check
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Description
The configured trains that are used by the analysis
new stream sequence or to edit an already-created sequence, click Stream Sequence .
The amount of time, in seconds, to purge the stream before starting an analysis, calibration, or
validation run. The default value is 60 SEC. Purging allows sample gas to flow through the sample loop
prior to beginning the run.
If enabled, the GC analyzes the calibration gas as an unknown stream and computes its energy value.
The GC then compares this value to the Cal Gas Cert CV and determines if the calibration gas's energy
value is within the CV Check Allowed Deviation. If it isn't, the GC triggers the Energy Value Invalid
alarm. The following conditions must be met before the GC can perform a EV Check:
■ The EV Check flag in the System window must be enabled.
■ At least one stream must be set up in the Streams window as a calibration stream, and the Auto
flag for this stream must be enabled.
The EV Check is performed under any of the following circumstances:
■ During a warm start that follows a power failure during normal operation. The GC waits for the
heater and electronic pressure controller to reach their respective set points and stabilize. It then
analyzes the calibration gas as an unknown stream and identifies the peaks. If all the component
peaks are identified, the GC computes the calibration gas' energy value and performs the EV
Check.
■ After a successful calibration, the GC computes the gas' energy value with the new response
factors and performs the EV Check
July 2020
Emerson.com/Rosemount