Emerson MMI-20019043 Manuel D’Utilisation

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 (0 to
10,000 Hz):

•

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.

If Frequency Output Scale Method is set to Frequency=Flow, and Frequency Output Maximum Pulse Width is set
to a non-zero value, Micro Motion recommends setting Frequency Factor to a value below 200 Hz.

Example: Configure Frequency=Flow

You want the frequency output to report all flow rates up to 2000 kg/min.

The frequency receiving device is configured for 10 pulses/kg.

Solution:

FrequencyFactor =

x 10

2000

60

333.33

FrequencyFactor =

FrequencyFactor =

x N

RateFactor

T

Set parameters as follows:

•

Rate Factor

: 2000

•

Frequency Factor

: 333.33

6.3.4

Configure Frequency Output Maximum Pulse Width

Display

ProLink II

ProLink

 > Configuration > Frequency/Discrete Output > Frequency > Freq Pulse Width

ProLink III

Device Tools

 > Configuration > I/O > Outputs > Frequency Output

Field Communicator Configure > Manual Setup > Inputs/Outputs > Frequency Output > FO Settings > Max Pulse Width

Frequency Output Maximum Pulse Width

 is used to ensure that the duration of the ON signal is

great enough for your frequency receiving device to detect.

Integrate the meter with the control system

112