25
Manual Supplement
00809-0200-4853, Rev AB
Rosemount 3051S Series Pressure Transmitter
November 2017
Rosemount 3051S Series Pressure Transmitter
Note
The Plugged Impulse Line diagnostic capability in the Rosemount 3051S F
OUNDATION Fieldbus Pressure
Transmitter calculates and detects significant changes in statistical parameters derived from the input
process variable. These statistical parameters relate to the variability of 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, it is not absolutely
warranted or guaranteed the PIL diagnostic will accurately detect each specific plugged impulse line
condition under all circumstances.
6.18 PIL functionality
The Advanced Diagnostics Suite provides the PIL diagnostic, as an easy way to apply SPM technology
specifically for detecting plugging in pressure measurement impulse lines. Similar to SPM, PIL also
calculates the mean and standard deviation of the pressure measurement and generates an alert when
the standard deviation exceeds an upper or lower limit.
Figure 16 illustrates a block diagram of the plugged impulse line diagnostic. Notice it is very similar to
the diagram for SPM shown in Figure 4. However, there are a couple of notable differences with PIL:
Statistical values (mean and standard deviation) are not available as outputs
The Plantweb alert generated specifically indicates “Plugged Impulse Line Detected”
Figure 16. Overview of Plugged Impulse Line Diagnostics
PIL also includes some additional features to make it especially suitable for detecting plugging in
pressure measurement impulse lines. PIL has the ability to:
Automatically relearn new baseline values if the pressure measurement changes significantly
Set the status quality of the pressure measurement to “Uncertain” if a plugged impulse line is detected
Check for a minimum process dynamics during the learning process
Adjust the verification settings
Set separate learning and detection periods
To Next Page
Loading...
