on-board temperature sensor (RTD) is always available. Optionally, you can set up an external temperature
device and use external temperature data.
The temperature setup that you establish here will be used for all concentration measurement matrices on
this meter.
Important
Line temperature data is used in several different measurements and calculations. It is possible to use the
internal RTD temperature in some areas and an external temperature in others. The transmitter stores the
internal RTD temperature and the external temperature separately. However, the transmitter stores only one
alternate temperature value, which may be either the external temperature or the configured fixed value.
Accordingly, if you choose a fixed temperature for some uses, and an external temperature for others, the
external temperature will overwrite the fixed value.
Procedure
Choose the method to be used to supply temperature data, and perform the required setup.
Method
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. Choose Menu → Configuration → Process Measurement →
Temperature.
b. Set External Temperature to Off.
Polling The meter polls an external
device for temperature data.
This data will be available
in addition to the internal
temperature data.
a. Choose Menu → Configuration → Process Measurement →
Temperature.
b. Set External Temperature to On.
c. Choose Poll External Device.
d. Select Polled Variable 1 or Polled Variable 2.
e. Set Variable to External Temperature.
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. A field communicator is not
a HART master.
Poll as Secondary Other HART masters will be on the
network. A field communicator is not
a HART master.
g. Set External Device Tag to the HART tag of the external
temperature device.
Digital
communications
A host writes temperature data
to the meter at appropriate
intervals. This data will be
available in addition to the
internal temperature data.
a. Choose Menu → Configuration → Process Measurement →
Temperature.
b. Set External Temperature to On.
c. Perform the necessary host programming and
communications setup to write temperature data to the
transmitter at appropriate intervals.
Configure process measurement applications Configuration and Use Manual
May2024 MS-00809-0200-1600
62 Emerson.com
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