Flow simulation deviation
LOI menu path Manual: → Diagnostics → Variables → MV Results → Manual
Results → Flow Sim Dev
Continuous: → Diagnostics → Variables → MV Results →
Continual Res → Flow Sim Dev
The flow simulation deviation is a measurement of the percent difference between the
simulated velocity and the actual measured velocity from the transmitter calibration
verification test. This value can be continuously monitored using continuous Smart Meter
Verification.
9.15 Optimizing the Smart Meter Verification
The Smart Meter Verification diagnostic can be optimized by setting the test criteria to the
desired levels necessary to meet the compliance requirements of the application. The
following examples below will provide some guidance on how to set these levels.
Example 1
An effluent meter must be certified annually to comply with environmental
regulations. This example regulation requires that the meter be certified to
five percent. Since this is an effluent meter, shutting down the process may
not be viable. In this instance the Smart Meter Verification test will be
performed under flowing conditions. Set the test criteria for flowing, full to
five percent to meet the requirements of the governmental agencies.
Example 2
A pharmaceutical company requires bi-annual verification of meter
calibration on a critical feed line for one of their products. This is an internal
standard, and the plant requires a calibration record be kept on-hand. Meter
calibration on this process must meet two percent. The process is a batch
process so it is possible to perform the calibration verification with the line
full and with no flow. Since the Smart Meter Verification test can be run
under no flow conditions, set the test criteria for no flow to two percent to
comply with the necessary plant standards.
Example 3
A food and beverage company requires an annual calibration of a meter on a
product line. The plant standard calls for the accuracy to be three percent or
better. They manufacture this product in batches, and the measurement
cannot be interrupted when a batch is in process. When the batch is
complete, the line goes empty. Since there is no means of performing the
Smart Meter Verification test while there is product in the line, the test must
be performed under empty pipe conditions. The test criteria for empty pipe
should be set to three percent, and it should be noted that the electrode
circuit health cannot be verified.
9.15.1 Optimizing continuous Smart Meter Verification
For continuous Smart Meter Verification, there is only one test criteria value to configure,
and it will be used for all flow conditions. The factory default is set to five percent to
minimize the potential for false failures under empty pipe conditions. For best results, set
the criteria to match the maximum value of the three test criteria set during commanded
meter verification (no flow, flowing full, and empty pipe).
Reference Manual Advanced Diagnostics Configuration
00809-0100-8782 November 2019
Reference Manual 105
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