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.
For all scaling methods, the transmitter puts out a fixed number of pulses per unit,
and at the same time, the Frequency Output signal varies in proportion to flowrate.
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 = x N
RateFactor
T
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 than1 Hz, reconfigure the receiving device for a higher
pulses/unit setting.
• If Frequency Factor is greater than 10,000 Hz, reconfigure the receiving device for a
lower pulses/unit setting.
Integrate the meter with the control system
Configuration and Use Manual 71
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