Alternate Method For Calculating The Meter Factor For Volume Flow; Perform A (Standard) D1 And D2 Density Calibration - Emerson Micro Motion 2700 Configuration And Use Manual

8.4.1 Alternate method for calculating the meter factor for
volume flow
The alternate method for calculating the meter factor for volume flow is used to avoid the
difficulties that may be associated with the standard method.
This alternate method is based on the fact that volume is inversely proportional to density.
It provides partial correction of the volume flow measurement by adjusting for the portion
of the total offset that is caused by the density measurement offset. Use this method only
when a volume flow reference is not available, but a density reference is available.
Procedure
1.
2.
3.
4.
8.5 Perform a (standard) D1 and D2 density
calibration
Density calibration establishes the relationship between the density of the calibration
fluids and the signal produced at the sensor. Density calibration includes the calibration of
the D1 (low-density) and D2 (high-density) calibration points.
Important
Micro Motion flowmeters are calibrated at the factory, and normally do not need to be calibrated in
the field. Calibrate the flowmeter only if you must do so to meet regulatory requirements. Contact
customer support before calibrating the flowmeter.
Tip
Use meter validation and meter factors, rather than calibration, to prove the meter against a
regulatory standard or to correct measurement error.
Configuration and Use Manual
Calculate the meter factor for density, using the standard method (see
Calculate the meter factor for volume flow from the meter factor for density:
MeterFactor
Note
The following equation is mathematically equivalent to the first equation. You may use
whichever version you prefer.
MeterFactor = ConfiguredMeterFactor
Volume
Ensure that the calculated meter factor does not fall outside 0.98 and 1.02. If the
meter factor is outside these limits, contact customer service.
Configure the meter factor for volume flow in the transmitter.
1
=
Volume
MeterFactor
Density
Density
Measurement support
Section 8.4).
Density
Flowmeter
Density
Reference Device
103