3-9
On-line Operations
NOTE
The transmitter determines differential temperature by subtracting
Sensor 2 from Sensor 1 (S1 – S2). Ensure that this order of subtraction
is consistent with the desired reading for your application. Refer to
Figure 2-7 on page 2-9, or inside the transmitter terminal-side cover for
sensor wiring diagrams.
5. Select 2 Term temp (terminal temperature), 5 Sensor Average, or
6Not Used from the Quaternary Variable (QV) menu.
6. Select OK after verifying the variable settings from the variable
mapping menu.
7. Select OK to return the control loop to automatic control.
8. Select HOME to return to the On-line menu.
9. Select 1 Device Setup, 4 Detailed Setup, 1 Sensors, 1 Process
Sensor, 4 Sensor Setup, 5 Misc Config, 2 Diff. Units to set the
desired differential units.
10. Select HOME to return to the Home screen.
11. Select 1 Device Setup, 4 Detailed Setup, 1 Sensors, 1 Process
Sensor, 4 Sensor Setup, 1 Snsr 1 Config, 1 Snsr 1 Conn to set the
sensor type and number of wires for Sensor 1. Repeat for
Sensor 2.
If you are using a meter for local indication, configure the meter to read
the appropriate variables (see “Meter Settings” on page 3-6).
Average Temperature
(1)
The Model 3244MV transmitter can output and display the average
temperature of any two inputs. Use the following procedure to configure
the transmitter to measure average temperature:
NOTE
This procedure assumes that you wish to configure average
temperature as the primary variable analog signal. If this is not the
case, assign average temperature to the secondary, tertiary, or
quaternary variable.
1. From the Home screen, select 1 Device Setup, 1 Process Variable,
8 Variable Re-map, to prepare to set the transmitter to display
differential temperature. Select OK after you set the control loop
to manual.
2. Select 5 Sensor Average from the Primary Variable (PV) menu.
3. Select three of the five remaining variables (differential
temperature, sensor 1, sensor 2, and terminal temperature) for
the Secondary Variable (SV), Tertiary Variable (TV), and
Quaternary Variable (QV).
4. Select OK after verifying the variable settings from the variable
mapping menu.
5. Select OK to return the control loop to automatic control.
6. Select HOME to return to the Online menu.
Model 3244MV
HART Fast Keys 1,1,8,5
(1) Average Temperature is not available in previous versions of the Model 3244MV transmitter.
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