Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
3-14
HART
3. Select three of the five variables (average temperature, sensor 1, sensor
2, First-Good, and terminal temperature) for the Secondary Variable
(SV), Tertiary Variable (TV), and Quaternary Variable (QV).
NOTE
The transmitter determines the differential temperature by subtracting the
reading of Sensor 2 from Sensor 1 (S1 – S2). Ensure that this order of
subtraction is consistent with the desired reading for the application. Refer to
Figure 2-12 on page 2-13, or inside the transmitter terminal-side cover for
sensor wiring diagrams.
4. After verifying the variable settings from the variable mapping menu
select OK.
5. Select OK to return the control loop to automatic.
6. Select HOME to return to the Online menu.
7. Select 1 Device Setup, 3 Configuration, 3 Dual-sensor configuration, 1
Differential Config, 1 Differential Units to set the desired differential units.
8. Select HOME to return to the Home screen.
If using an LCD display for local indication, configure the meter to read the
appropriate variables by using “LCD Display Options” on page 3-21.
Average Temperature
Field Communicator
The 3144P transmitter configured for dual-sensors can output and display
the average temperature of any two inputs. Use the following procedure
with Traditional Fast Keys to configure the transmitter to measure the
average temperature:
Configure Sensor 1 and Sensor 2 appropriately. Select 1 Device Setup, 3
Configuration, 2 Sensor Configuration, 1 Change Type and Conn. to set
the sensor type and number of wires for Sensor 1. Repeat for Sensor 2.
NOTE
This procedure configures the average temperature as the primary variable
analog signal. If this is not needed, assign the average 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 set the transmitter to display the
average temperature. Set the control loop to manual and select OK.
2. Select 4 Sensor Average from the Primary Variable (PV) menu.
3. Select three of the five variables (differential temperature, sensor 1,
sensor 2, First-Good, and terminal temperature) for the Secondary
Variable (SV), Tertiary Variable (TV), and Quaternary Variable (QV).
4. After verifying the variable settings in variable mapping menu select OK.
Traditional Fast Keys 1, 3, 1, 5, 4
Device Dashboard Fast Keys 2, 2, 3, 2
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