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Reference Manual
00809-0100-4444, Rev AC
Section 6: Advanced Diagnostics Configuration
January 2015
Advanced Diagnostics Configuration
6.9 SMART
™
Meter Verification
The SMART Meter Verification diagnostic provides a means of verifying the flowmeter is within
calibration without removing the sensor from the process. This diagnostic test provides a review
of the transmitter and sensor's critical parameters as a means to document verification of
calibration. The results of this diagnostic provide the deviation amount from expected values
and a pass/fail summary against user-defined criteria for the application and conditions. The
SMART Meter Verification diagnostic can be configured to run continuously in the background
during normal operation, or it can be manually initiated as required by the application.
6.9.1 Sensor baseline (signature) parameters
The SMART Meter Verification diagnostic functions by taking a baseline sensor signature and
then comparing measurements taken during the verification test to these baseline results.
The sensor signature describes the magnetic behavior of the sensor. Based on Faraday's law, the
induced voltage measured on the electrodes is proportional to the magnetic field strength.
Thus, any changes in the magnetic field will result in a calibration shift of the sensor. Having the
transmitter take an initial sensor signature when first installed will provide the baseline for the
verification tests that are done in the future. There are three specific measurements that are
stored in the transmitter's non-volatile memory that are used when performing the calibration
verification.
Coil circuit resistance
The coil circuit resistance is a measurement of the coil circuit health. This value is used as a
baseline to determine if the coil circuit is still operating correctly.
Coil inductance (signature)
The coil inductance is a measurement of the magnetic field strength. This value is used as a
baseline to determine if a sensor calibration shift has occurred.
Electrode circuit resistance
The electrode circuit resistance is a measurement of the electrode circuit health. This value is
used as a baseline to determine if the electrode circuit is still operating correctly.
LOI menu path
Diagnostics, Advanced Diag, Meter Verify, Sensr Baseline, Values, Coil Resist
Traditional fast keys
1,2,3,2,3,1,1
Device dashboard
2,2,6,1,1
LOI menu path Diagnostics, Advanced Diag, Meter Verify, Sensr Baseline, Values, Inductnce
Traditional fast keys 1,2,3,2,3,1,2
Device dashboard 2,2,6,1,2
LOI menu path Diagnostics, Advanced Diag, Meter Verify, Sensr Baseline, Values, Electrode
Res
Traditional fast keys 1,2,3,2,3,1,3
Device dashboard 2,2,6,1,3