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4.8.6 Measuring Net Mass Flow Rate and Net Volume Flow
Rate
Net Mass Flow Rate is calculated by multiplying concentration by the mass flow rate. Net
Volume Flow Rate is calculated by multiplying concentration by the volume flow rate.
To measure Net Mass Flow Rate, the following are required:
• A mass flow rate process variable, either measured or calculated, depending on
what is available on your meter
• Concentration measurement configured and active, with Mass Concentration
(Density) set as the derived variable
To measure Net Volume Flow Rate, the following are required:
• A volume flow rate process variable, either measured or calculated, depending on
what is available on your meter
• Concentration measurement configured and active, with Volume Concentration
(Density) set as the derived variable
4.9 Set up flow rate measurement
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.
• Set up flow rate measurement using ProLink III (Section 4.9.1)
• Set up flow rate measurement using the Field Communicator (Section 4.9.2)
4.9.1 Set up flow rate measurement using ProLink III
ProLink III Device Tools > Configuration > I/O > Inputs > External Inputs
Overview
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.
Configure process measurement
82 Micro Motion
®
Fork Viscosity Meters (FVM)