
Using ProLink
®
Software with Micro Motion
®
Transmitters
131
Applications Menu Help Menu
Configure Menu:
Meter Factors
Calibrate Menu Test Menu
13 Configure Menu:
Meter Factors
13.1 Overview
Meter factors adjust the flowmeter measurement without modifying
calibration factors. Meter factors perform the following operation on
flowmeter measurements:
Meter factors can be entered for mass flow, density, or volume flow, only
when connected to a Version 3.0 RFT9739 transmitter. Meter factors
cannot be entered for earlier RFT9739 versions, or for IFT9701,
IFT9703, RFT9712, or RFT9729 transmitters.
13.2 Meter factors for mass,
volume, and density
Meter factors apply primarily to proving applications, in which the
flowmeter measurement is checked against a calibrated reference. The
reference measurement is assumed to be correct. The meter factor is
determined from the following calculation:
• For a mass-flow meter factor, check the flowmeter mass flow
measurement against a reference.
• For a density meter factor, check the flowmeter density measurement
against a reference.
• For a volume-flow meter factor, check the flowmeter volume flow
measurement against a reference.
Coriolis mass and density measurements are independent from one
another. The volume measurement is derived from the mass and density
measurements:
Because the volume measurement is derived from the mass and density
measurements, the volume measurement is corrected when meter
factors for mass flow and density are entered. The volume-flow meter
factor has no effect on the flowmeter mass or density measurements.
• If a mass-flow or density meter factor is entered, the volume meter
factor defaults to 1.0000.
• If a volume-flow meter factor is entered, the mass and density meter
factors each default to 1.0000.
• Only values from 0.8 to 1.2 may be entered.
Corrected measurement Meter factor Uncorrected measurement
⋅
=
Meter factor
Reference device measurement
Flowmeter measurement
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Volume
Mass
Density
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