Spm Configuration And Operation - Emerson Rosemount 3051CF Series Reference Manual

Advanced pressure diagnostics
July 2020
settings, SPM generates an alert via FOUNDATION Fieldbus. The alert may indicate a
change in the process, equipment, or transmitter installation.
Note
The SPM diagnostic capability in the Rosemount 3051 Transmitter calculates and detects
significant changes in statistical parameters derived from the input process variable. These
statistical parameters relate to the variability of and the noise signals present in the
process variable. It is difficult to predict specifically which noise sources may be present in
a given measurement or control application, the specific influence of those noise sources
on the statistical parameters, and the expected changes in the noise sources at any time.
Therefore, Emerson
detect each specific condition under all circumstances.
7.5

SPM configuration and operation

The following section describes the process of configuring and using the Statistical Process
Monitoring diagnostic.
7.5.1 SPM configuration for monitoring pressure
The device's pressure measurement is permanently factory pre-configured as the SPM
input. To configure the SPM Block, set the following parameters:
Learning the process dynamics
Procedure
Using guided configuration, enter the monitoring cycle for SPM to learn the process.
Note
The minimum monitoring cycle value is one minute; the typical recommended monitoring
cycle is three minutes.
Verification
Normally SPM uses a verification period to determine the stability of the process noise
before beginning monitoring. You can bypass this step to reduce SPM setup time.
Note
Emerson
SPM_Monitoring_Cycle = [1 – 1440] minutes (see
(Optional) SPM_Bypass_Verification = [Yes/No] (see SPM_Bypass_Verification)
After you enable SPM, it will spend time equal to one SPM_Monitoring_Cycle (e.g., five
minutes) in the learning phase and then another time period equal to one
SPM_Monitoring_Cycle in the verification phase. If it detects a steady process at the end of
the verification phase, the SPM will move into the monitoring phase. After five minutes in
the monitoring phase, SPM will have the current statistical values (e.g., current mean and
standard deviation) and will begin comparing them against the baseline values to
determine if an SPM Alert is detected.
124
™
cannot absolutely warrant or guarantee that SPM will accurately
™
does not recommend bypassing the verification.
Reference Manual
00809-0100-4774
Other SPM settings)
Rosemount 3051