c) Optional: Set Energy Flow Unit to the unit to be used to measure energy flow.
2. If you want to use fixed values for Percent CO, Percent CO2, Percent N2, and/or Percent H2:
a) Choose Configure → Manual Setup → Measurements → Optional Setup → Energy Content
Measurement → Gas Composition.
b) Enter the fixed values, in % by volume.
3. If you want to poll for Percent CO, Percent CO2, Percent N2, and/or Percent H2:
a) Choose Configure → Manual Setup → Inputs/Outputs → External Device Polling and click
External Device Polling.
b) Choose an unused polling slot.
c) Set Poll Control to Poll as Primary or Poll as Secondary.
d) Set External Device Tag to the HART tag of the external measurement device.
e) Set Polled Variable to the appropriate variable.
4. Optional: To configure Volume Flow (External) and Mass Flow (Calculated):
a) Choose Configure → Manual Setup → Inputs/Outputs → External Device Polling.
b) Choose an unused polling slot.
c) Set Poll Control to Poll as Primary or Poll as Secondary.
d) Set External Device Tag to the HART tag of the external measurement device.
e) Set Polled Variable to Volume from Mag/Vortex Meter.
f) Choose Configure → Manual Setup → Measurements → Optional Setup → External Inputs →
Configure External Inputs → Volume.
g) Set Volume Flow Source to Enable.
h) Choose Configure → Manual Setup → Measurements → Volume.
i) Set Volume Flow Rate Unit to the unit used by the external device.
j) Choose Configure → Manual Setup → Measurements → Mass.
k) Set Mass Flow Rate Unit to the unit to be used for Mass Flow (Calculated).
5. Optional: To configure Mass Flow (External) and Volume Flow (Calculated):
a) Choose Configure → Manual Setup → Inputs/Outputs → External Device Polling.
b) Choose an unused polling slot.
c) Set Poll Control to Poll as Primary or Poll as Secondary.
d) Set External Device Tag to the HART tag of the external measurement device.
e) Set Polled Variable to Mass Flow from Coriolis Meter.
f) Choose Configure → Manual Setup → Measurements → Optional Setup → External Inputs →
Configure External Inputs → Mass.
Configure process measurement using a field communicator Configuration and Use Manual
March 2021 MMI-20020954
74 Micro Motion Gas Specific Gravity Meters (SGM)
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