Emerson Micro Motion SGM Series Configuration And Use Manual page 63

Procedure
1.
Option Description
Internal RTD tem- Temperature data from the on-
perature data board temperature sensor
(RTD) is used.
Polling The meter polls an external de-
vice for temperature data. This
data will be available in addi-
tion to the internal RTD tem-
perature data.
Digital communica- A host writes temperature data
tions to the meter at appropriate in-
tervals. This data will be availa-
ble in addition to the internal
RTD temperature data.
2.
Postrequisites
If you are using external temperature data, verify the external temperature value displayed
in the Inputs group on the ProLink III main window.
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Configuration and Use Manual
Choose the method to be used to supply temperature data, and perform the
required setup.
If you set up an external temperature:
a. Choose Device Tools > Configuration > I/O > Inputs > External Inputs.
b. In the Line Temperature Input group, check or uncheck the checkboxes as
desired.
If a checkbox is checked, the internal temperature is used for that measurement
or calculation. If a checkbox is unchecked, the external temperature is used.
If the value is not correct:
For polling:
Configure process measurement using ProLink III
Setup
a. Set Line Temperature Source to Internal RTD.
b. Click Apply.
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 net-
work. The Field Communicator is not a
HART master.
d. Set External Device Tag to the HART tag of the temperature
device.
e. Click Apply.
a. Set Line Temperature Source to Fixed Value or Digital Communi-
cations.
b. Click Apply.
c. Perform the necessary host programming and communica-
tions setup to write temperature data to the meter at appro-
priate intervals.
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