Option Description Setup
Internal
temperature
Temperature data from the on-
board temperature sensor
(RTD) will be used for all
measurements and
calculations. No external
temperature data will be
available.
a. Set Line Temperature Source to Internal.
b. Click Apply.
Polling The meter polls an external
device for temperature data.
This data will be available in
addition to the internal RTD
temperature data.
a. Set Line Temperature Source to Poll for External Value.
b. Set Polling Slot to an available slot.
c. 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.
d. Set External Device Tag to the HART tag of the
temperature device.
e. Click Apply.
mA Input
An external device sends
temperature data to the meter
via the mA Input. This data will
be available in addition to the
internal temperature data.
a. Set Channel D to operate as an mA Input.
b. Set mA Input Assignment to External Temperature.
c. Set Pressure Source to mA Input.
Digital
communications
A host writes temperature data
to the meter at appropriate
intervals. This data will be
available in addition to the
internal RTD temperature data.
a. Set Line Temperature Source to Fixed Value or Digital
Communications.
b. Click Apply.
c. Perform the necessary host programming and
communications setup to write temperature data to the
meter at appropriate intervals.
Postrequisites
If you are using external temperature data, verify the external temperature value displayed in the Inputs
group on the ProLink III main window.
Need help?
If the value is not correct:
• 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.
Configuration and Use Manual Configure process measurement applications
MMI-20025166 March 2019
Configuration and Use Manual 83
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