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Options for Frequency Output Polarity (continued)Table 6-5:
Polarity Reference voltage (OFF) Pulse voltage (ON)
Active Low
As determined by power sup-
ply, pull-up resistor, and load
(see the installation manual for
your transmitter)
0
6.3.2 Configure Frequency Output Scaling Method
ProLink II ProLink > Configuration > Frequency/Discrete Output > Frequency > Scaling Method
ProLink III Device Tools > Configuration > I/O > Outputs > Frequency Output
Field Communicator Configure > Manual Setup > Inputs/Outputs > Frequency Output > FO Scaling
Overview
Frequency Output Scaling Method defines the relationship between output pulse and flow
units. Set Frequency Output Scaling Method as 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:
Integrate the meter with the control system
80 Micro Motion
®
Model 1500 Transmitters with Analog Outputs