Chapter 9 Measurement Support; Options For Measurement Support - Emerson Micro Motion 1700 Configuration And Use Manual

9 Measurement support
Topics covered in this chapter:
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9.1

Options for measurement support

Micro Motion provides several measurement support procedures to help you evaluate and
maintain your flowmeter's accuracy.
The following methods are available:
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Tips
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Configuration and Use Manual
Options for measurement support
Use Smart Meter Verification (SMV)
Use PVR, TBR, and TMR
Piecewise linearization (PWL) for calibrating gas meters
Zero the meter
Validate the meter
Perform a (standard) D1 and D2 density calibration
Perform a D3 and D4 density calibration (T‐Series sensors only)
Perform temperature calibration
Smart Meter Verification (SMV) evaluates the structural integrity of the sensor tubes
by comparing current tube stiffness to the stiffness measured at the factory.
Stiffness is defined as the load per unit deflection, or force divided by displacement.
Because a change in structural integrity changes the sensor's response to mass and
density, this value can be used as an indicator of measurement performance.
Meter validation compares flowmeter measurements reported by the transmitter to
an external measurement standard. Meter validation requires one data point.
Calibration establishes the relationship between a process variable and the signal
produced at the sensor. You can calibrate the flowmeter for zero, density, and
temperature. Density and temperature calibration require two data points (low and
high) and an external measurement for each.
Perform SMV at regular intervals to get the best data on your meter's performance.
To prove the meter against a regulatory standard, or to correct measurement error, use
meter validation and meter factors.
Before performing a field calibration, contact customer support to see if there is an
alternative. In many cases, field calibrations have a negative effect on measurement accuracy.
Measurement support
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