ABB 800xA Operation page 118

Methodology
During Monitoring, the Asset Monitor at every analysis phase checks the COPS and
compares with the available BOPS. If the COPS data falls within the respective
tolerance band values (see, BOPS Info Tab) of any particular BOPS data set, Enew
and Unew will be calculated and compared to the BOPS stored Ebaseline. The Asset
Monitor also evaluates and set all the active subconditions.
Training
The training mode is comprised of collection and analysis cycle. At the end of each
collection phase, a new COPS is established as explained in the Monitoring section
and these COPS values are used to calculate Ebaseline during the analysis phase. A
BOPS will be created for each stable significantly different operating level of the
heat exchanger. Significantly different will be determined by a percentage (Delta
BOPS) that is configured by the user or greater change in any one or more of the
following variables:
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Stable will be when the BOPS that is significantly different is recorded, remains
within one percent of change for three consecutive executions.
All the conditions are set to "Normal" with quality status as "goodLocalOverride"
during the period of training.
Reporting Changes
If Enew is down by a percentage (E_Decline_Level) that is configured by the user
or more of Ebaseline, an alarm will be generated. The ACD will inform plant
operations personnel that the heat exchanger operational efficacy has declined and
that a fault report or work order may be necessary. If Enew is down by a percentage
(E_Significant_Decline_Level) configured by the user or more of Ebaseline, an
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T Hot In.
T Hot Out.
T Cold Out.
T Cold In.
Delta Tx.
W Hot.
W Cold.
Delta P Hot.
Delta P Cold.
Section 9 Heat Exchanger Asset Monitor (HXAM)
3BUA000150-600