• Ensure that the external device and the meter are using the same measurement unit.
• For polling:
- Verify the wiring between the meter and the external device.
- Verify the HART tag of the external device.
• For digital communications:
- Verify that the host has access to the required data.
- Verify that the host is writing to the correct register in memory, using the correct data
type.
• If necessary, apply an offset.
Related information
Measuring Net Mass Flow Rate and Net Volume Flow Rate
4.7.2 Set up flow rate measurement using the
Field Communicator
The meter does not measure flow rate directly. However, you can provide volume flow rate
data to the meter and use this data to calculate mass flow rate. If concentration
measurement is set up and meets specific configuration requirements, the meter can
calculate net mass flow rate or net volume flow rate.
Prerequisites
To calculate mass flow rate, you must be able to supply volume flow rate data to the
meter.
If you plan to poll an external device, the primary mA output must be wired to support
HART communications.
Procedure
1. Choose Configure > Manual Setup > Measurements > Mass (Calculated) and set Mass Flow
Rate Unit to the unit in which the mass flow rate will be reported.
2. Choose Configure > Manual Setup > Measurements > Volume and set Volume Flow Rate Unit
to the unit used by the external volume measurement device.
3. Choose Configure > Manual Setup > Measurements > External Inputs > Volume and set Volume
Flow Source to Enabled.
4. Choose the method to be used to supply volume flow rate data, and perform the
required setup.
Configure process measurement
64 Micro Motion
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Fork Density Meters (FDM)
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