Option Description
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 Output0 to 1000 Hz :
• If Frequency Factor is less than1 Hz, reconfigure the receiving device for a higher pulses/unit setting.
• If Frequency Factor is greater than 1,000 Hz, reconfigure the receiving device for a lower pulses/unit
setting.
8.3.3 Configure Frequency Output Direction
Display
Menu > Configuration > Inputs/Outputs > Channel x > I/O Settings > Direction
ProLink III Device Tools > Configuration > I/O > Outputs > Frequency Output x > Direction
Field Communicator Configure > Manual Setup > Inputs/Outputs > Channel x > Frequency Output x > FOxSettings
Frequency Output Direction controls how conditions of forward flow and reverse flow affect the flow rates
reported by the Frequency Output.
Actual flow direction interacts with Sensor Flow Direction Arrow to determine the flow direction that the
transmitter uses in processing. See the following table.
Integrate the meter with the control system Configuration and Use Manual
April 2019 MMI-20048166
104 Micro Motion 4200 Transmitters
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