Reference Manual
00809-0100-4021, Rev FB
August 2011
3-13
Rosemount 3144P
HART
To use this feature, follow the steps below with the Traditional Fast Key
sequence:
1. Install the 2-wire RTD and the 3144P and measure the lead wire
resistance of both RTD leads.
2. From the HOME screen, select 1 Device Setup, 3 Configuration,
2 Sensor Configuration, 3 Sensor 1 Setup, 6 2-Wire Offset.
3. Enter the total measured resistance of the two RTD leads at the 2-Wire
Offset prompt as a negative (–) value to ensure proper adjustment. The
transmitter will adjust its temperature measurement to correct the error
caused by lead wire resistance.
4. Repeat Steps 1 through 3 for sensor 2, selecting 1 Device Setup, 3
Configuration, 2 Sensor Configuration, 4 Sensor 2 Setup, 6 2-Wire
Offset.
Terminal (Body)
Temperature
The Terminal Temp command sets the temperature units to indicate the
temperature at the transmitter terminals.
Dual-Sensor
Configuration
Dual-sensor configuration sets the functions that can be used with a
dual-sensor configured transmitter, including Differential Temperature,
Average Temperature, First Good Temperature, Hot Backup, and Sensor
Drift Alert.
Differential Temperature
Field Communicator
The 3144P configured for a dual-sensor can accept any two inputs then
display the differential temperature between them. Use the following
procedure with Traditional Fast Keys to configure the transmitter to
measure differential temperature:
Configure Sensor 1 and Sensor 2, appropriately. Select 1 Device Setup, 3
Configuration, 2 Sensor Configuration, 1 Change type/conn to set the
sensor type and number of wires for Sensor 1. Repeat for Sensor 2.
NOTE
This procedure reports the differential temperature as the primary variable
analog signal. If this is not needed, assign differential temperature to the
secondary, tertiary, or quaternary variable.
1. From the HOME screen, select 1 Device Setup, 3 Configuration, 1
Variable Mapping, 5 Variable Re-Map to prepare to set the transmitter
to display differential temperature. Set the control loop to manual, and
select OK.
2. Select 3 Diff from the Primary Variable (PV) menu.
Traditional Fast Keys 1, 3, 2, 5
Device Dashboard
Fast Keys
2, 2, 7, 3
Traditional Fast Keys 1, 3, 3
Device Dashboard
Fast Keys
2, 2, 3
Traditional Fast Keys 1, 3, 1, 5, 3
Device Dashboard Fast Keys 2, 2, 3, 1
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