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
00809-0100-4774
July 2020
Reference Manual
127
Summary of Contents for Rosemount 3051 CF Series
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Page 56: ...Configuration Reference Manual July 2020 00809 0100 4774 56 Rosemount 3051 ...
Page 92: ...Electrical installation Reference Manual July 2020 00809 0100 4774 92 Rosemount 3051 ...
Page 102: ...Operation and maintenance Reference Manual July 2020 00809 0100 4774 102 Rosemount 3051 ...
Page 118: ...Troubleshooting Reference Manual July 2020 00809 0100 4774 118 Rosemount 3051 ...
Page 138: ...Reference data Reference Manual July 2020 00809 0100 4774 138 Rosemount 3051 ...
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