Process variable
Label
Display
PLIII
FC
Net volume flow rate
Net Volume Flow Rate
Net Volume Flow Rate
Net Volume Flow Rate (CM)
Energy measurement
Energy flow
Energy Flow
Energy Flow
8.4.2 Configure Frequency Output Scaling
Display
Menu
>
Configuration
>
Inputs/Outputs
>
Channel x
>
Frequency Output x
>
Scaling Method
ProLink III
Device Tools
>
Configuration
>
I/O
>
Outputs
>
Frequency Output x
>
Scaling Method
Field Communicator
Configure
>
Manual Setup
>
Inputs/Outputs
>
Channel
x
>
Frequency Output
x
>
FO
x
Scaling
Frequency output scaling defines the relationship between
Frequency Output Source
and the pulse of the
Frequency Output. Scale the Frequency Output to provide the data in the form required by your frequency
receiving device.
Procedure
1. Set
Frequency Output Scaling Method
.
Option
Description
Frequency=Flow (default)
Frequency calculated from flow rate
Pulses/Unit
A user-specified number of pulses represents one flow unit
Units/Pulse
A pulse represents a user-specified number of flow units
2. Set additional required parameters.
•
If you set
Frequency Output Scaling Method
to Frequency=Flow, set
Rate Factor
and
Frequency
Factor
.
•
If you set
Frequency Output Scaling Method
to Pulses/Unit, define the number of pulses that will
represent one flow unit.
•
If you set
Frequency Output Scaling Method
to Units/Pulse, define the number of units that each
pulse will indicate.
Calculate frequency from flow rate
The Frequency=Flow option is used to customize the Frequency Output for your application when you do not
know appropriate values for Units/Pulse or Pulses/Unit.
If you specify Frequency=Flow, you must provide values for
Rate Factor
and
Frequency Factor
:
Rate Factor
The maximum flow rate that you want the Frequency Output to report.
Frequency Factor
A value calculated as follows:
FrequencyFactor RateFactor
T
× N
Configuration and Use Manual
Integrate the meter with the control system
MMI-20025166
March 2019
Configuration and Use Manual
151