Emerson Rosemount 3051CF Series Reference Manual page 127

Reference Manual
00809-0100-4774
limit. A lower value makes the diagnostic more sensitiv, and could potentially lead to false
detections.
Figure 7-6: Example Alerts for Standard Deviation
A. Alert limit
B. Standard deviation
C. Baseline
D. Alert
7.5.4 SPM operations
During operation, the following values are updated for the SPM Block.
SPM_Baseline_Mean
Baseline Mean (calculated average) of the process variable is determined during the
learning/verification process and represents the normal operating condition.
SPM_Mean
Current mean of the process variable.
SPM_Mean_Change
Percent change between the Baseline Mean and the Current Mean.
SPM_Baseline_StDev
The Baseline Standard Deviation of the process variable is determined during the learning/
verification process and represents the normal operating condition
Reference Manual
Advanced pressure diagnostics
July 2020
127