Emerson Rosemount 8782 Reference Manual page 86

Advanced Configuration Functionality
November 2019
Low
The standard coil drive frequency is Low. This is the recommended coil drive frequency
setting for most applications.
High
If the process fluid causes a noisy or unstable flow reading, increase the coil drive
frequency to High. If the coil drive frequency is set to High, the auto zero trim is highly
recommended for optimal performance. Not performing the auto zero trim can lead to
degraded accuracy, especially at low flow rates.
8.5.2 Process density
LOI menu path
Use the process density value to convert from a volumetric flow rate to a mass flow rate
using the following equation:
Qm = Qv x p
Where:
Qm is the mass flow rate
Qv is the volumetric flow rate, and
p is the fluid density
8.5.3 Reverse flow
LOI menu path
Use reverse flow to enable or disable the transmitter's ability to read flow in the opposite
direction of the flow direction arrow (see
has bi-directional flow, or when either the electrode wires or the coil wires are reversed
(see Troubleshooting
reverse direction.
8.5.4 Low flow cutoff
LOI menu path
Low flow cutoff allows the user to set a low flow limit to be specified. The low flow cutoff
units are the same as the PV units and cannot be changed. The low flow cutoff value
applies to both forward and reverse flows.
86
Detailed Setup → More Params → Proc Density
Detailed Setup → Output Config → Reverse Flow
Flow
Remote wiring). This also enables the totalizer to count in the
Detailed Setup → Sig Processing → Lo-Flow Cutoff
®
Rosemount 8782 Slurry Magnetic Flow Meter Transmitter with HART Protocol
direction). This may occur when the process
Reference Manual
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