Method Description Setup
Polling The meter polls an external
device for pressure data.
a. Choose Menu > Configuration > Process Measurement >
Pressure > External Pressure.
b. Set External Pressure to On.
c. Choose Poll External Device.
d. Select Polled Variable 1 or Polled Variable 2.
e. Set Variable to External Pressure.
f. Set Polling Control to Poll as Primary or Poll as Secondary.
Option Description
Poll as Primary No other HART masters will be on the
network. The Field Communicator is
not a HART master.
Poll as Secondary Other HART masters will be on the
network. The Field Communicator is
not a HART master.
g. Set External Device Tag to the HART tag of the external
pressure device.
mA Input
An external device sends
pressure data to the meter via
the mA Input.
a. Choose Menu > Configuration > Process Measurement >
Pressure > External Pressure.
b. Set External Pressure to On.
c. Choose Menu > Configuration > Inputs/Outputs > Channel
D.
d. Set I/O Type to MAI.
e. Set Power appropriately.
f. Choose I/O Settings.
g. Set Assignment to External Pressure.
h. Set Lower Range Value and Upper Range Value
appropriately.
Digital
communications
A host writes pressure data to
the meter at appropriate
intervals.
a. Choose Menu > Configuration > Process Measurement >
Pressure > External Pressure.
b. Set External Pressure to On.
c. Perform the necessary host programming and
communications setup to write pressure data to the
transmitter at appropriate intervals.
Postrequisites
Choose Menu > Service Tools > Service Data > View Process Variables and verify the values for External
Temperature and External Pressure.
Configuration and Use Manual Configure process measurement applications
MMI-20025166 March 2019
Configuration and Use Manual 57
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