14 Measurement support
14.1 Use Smart Meter Verification (SMV)
You can run an SMV test, view and interpret the results, and set up automatic execution.
14.1.1 Run an SMV test
Run an SMV test to ensure that your sensor has not experienced coating, corrosion, erosion, or any other
physical or mechanical damage that affects measurement accuracy.
•
If SMV results show that the meter has passed, then measurements meet specifications.
•
If SMV results show that the meter has failed, measurement may be affected.
•
If SMV results show that the meter has aborted, then either a problem occurred with the meter verification
test (e.g., process instability) or you stopped the test manually.
Prerequisites
For full capabilities, SMV must be licensed on your transmitter. If no license is active, you can still initiate SMV;
you will receive an indication as to whether the meter has passed or failed the SMV run.
If you have a remote core processor (4-wire remote installations or remote core processor with remote
transmitter installations), you must be using the enhanced core processor, v3.6 or later (v4.4 or later to
detect coating). The standard core processor does not support SMV. (For other installation types, the
enhanced core processor is always used.)
The SMV test runs best when process conditions are stable. If conditions are too unstable, the test will abort.
To maximize process stability:
•
Maintain a constant fluid temperature and pressure.
•
Maintain a constant flow rate. If possible, stop flow through the sensor.
•
Avoid changes to fluid composition, for example, two-phase flow or settling.
If you plan to use a fixed value during the SMV test, ensure that all affected control loops are prepared for the
interruption in process measurement. The test will run for approximately 140 seconds.
Run an SMV test using the display
Procedure
1. Read the Prerequisites in
Use Smart Meter Verification (SMV)
if you have not done so already.
2. Choose
Menu
>
Service Tools
>
Verification and Calibration
>
Smart Meter Verification
>
Run SMV
.
3. Select the desired output behavior.
Option
Description
Continue Measuring During the test, all outputs will continue to report their assigned process
variables. The test will run for approximately 90 seconds.
Fix at Last
Measured Value
During the test, all outputs will report the last measured value of their assigned
process variable. The test will run for approximately 140 seconds.
Configuration and Use Manual
Measurement support
MMI-20025166
March 2019
Configuration and Use Manual
199
