Process variable
Label
Display PLIII
Net volume flow rate Net Volume Flow Rate Net Volume Flow Rate
8.5.2 Configure Frequency Output Scaling
Display Menu → Configuration → Inputs/Outputs → Channel B → I/O Settings → Scaling Method
ProLink III Device Tools → Configuration → I/O → Outputs → Frequency Output → Scaling Method
Field communicator Device Settings → Inputs/Outputs → 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
where:
T
Factor to convert selected time base to seconds
N
Number of pulses per flow unit, as configured in the receiving device
The resulting Frequency Factor must be within the range of the Frequency Output :
• If Frequency Factor is less than 1 Hz, reconfigure the receiving device for a higher pulses/unit setting.
Configuration and Use Manual Integrate the meter with the control system
MS-00809-0200-1600 May2024
Configuration and Use Manual 107
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