Emerson Rosemount 3051S Series, Reference Manual

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Reference Manual
00809-0100-4801, Rev FA
October 2010
Rosemount 3051S Series
7-6
Figure 7-4. Statistical Process
Monitoring diagnostic resident in
transmitter
SPM also contains a learning module that establishes the baseline values for
the process. Baseline values are established under user control at conditions
considered normal for the process and installation. These baseline values are
made available to a decision module that compares the baseline values to the
most current statistical values. Based on sensitivity settings and actions
selected by the user via the control input, the diagnostic generates alarms,
alerts, or takes other actions when a significant change is detected in either
value.
Process
Variable
Statistical
Calculations
Module
Learning
Module
Decision
Module
Standard Outputs
(4-20 mA / HART)
Control Inputs
Outputs
HART alert /
4-20 mA alarm
Resident in Transmitter
Statistical Parameters
Baseline
Values