Emerson Micro Motion SGM Series Configuration And Use Manual page 89

Tip
In either case, you can measure energy flow in either mass units or volume units. The meter
automatically selects the appropriate process variable.
If you plan to poll an external device for any of these, ensure that the meter has the
required polling slots available. The meter provides four polling slots, and they may be
already in use. You may need to use a fixed value or digital communications for some
external values. To check the current polling configuration, choose Configure > Manual
Setup > Inputs/Outputs > External Device Polling. If you are already polling for one of
these, you can use the existing polled data.
Procedure
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Configuration and Use Manual
Set the measurement units.
a. Choose Configure > Manual Setup > Measurements > Energy.
b. Set Calorific Value Unit to the unit to be used to measure calorific value.
c. (Optional) Set Energy Flow Unit to the unit to be used to measure energy flow.
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.
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.
(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.
Configure process measurement using the Field Communicator
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