ProSoft Technology MVI56E-AFC, Setup And Configuration Manual, Page: 80 / 151

MVI56E-AFC / MVI69E-AFC ♦ Enhanced Liquid and Gas Flow Computer Configuring Differential Meter Parameters
ControlLogix® and CompactLogix™ Setup and Configuration Guide
ProSoft Technology, Inc. Page 80 of 151
Parameter
Description
DP Flow Threshold If at any time the differential pressure input value is less than the DP Flow
Threshold parameter, the module will treat the differential pressure as
zero (no flow).
Override discharge
coefficient For an Orifice meter, AGA3 dictates the calculation of the "Coefficient of
Discharge", a multiplicative factor used in calculating the flow rate. For a
V-cone meter, there is no corresponding calculation, so the Coefficient of
Discharge must be entered from the manufacturer’s data sheet. The "V-
Cone Discharge Coefficient" has no meaning unless the "V-Cone Device"
option is selected (see Calculation Options button).
Viscosity
The viscosity of the fluid, used only in the calculation of the meter’s
coefficient of discharge. For this product group, the default value for this
point is the viscosity recommended by AGA 3 for natural gas fluids,
0.010268. For liquid fluids, a more representative value should be chosen.
Meter Factors Displays the Meter Factor Linearization Curve dialog for this stream.