Configure the output parameters
• Basic setup screen
• Set process variable units
• Set primary variable
• Rerange
• Set transfer function (direct process variable feature board only)
• Set damping
Calibrate the sensor (DP, P, and/or T)
For each sensor, perform:
• Sensor trim overview
• Zero trim or Upper and lower sensor trim
Calibrate the 4–20 mA output
About this task
• 4–20 mA analog trim (see Analog output trim); or
• 4–20 mA scaled output trim (see Scaled analog output trim)
Figure 4-1 summarizes the data flow for the Rosemount 3051SMV. Data flows from left to
right, and a parameter change affects all values to the right of the changed parameter.
Figure 4-1: Transmitter Data Flow
Measured
process
inputs
DP
P
T
A/D
Micro D/A
Analog mA output
(primary variable)
Digital HART variables
(primary, 2nd, 3rd, and 4th)
Data flow can be summarized in four major steps:
Procedure
1. A change in a process variable (DP, P, and/or T) corresponds to a change in the
sensor output (Sensor Signal).
2. The sensor signal is converted to a digital format that is understood by the
microprocessor (Analog-to-Digital Signal Conversion).
3. Corrections and flow calculations are performed in the microprocessor to obtain a
digital representation of the process output variables.
4. The Digital Primary Variable (PV) is converted to an analog value (Digital-to-Analog
Signal Conversion).
Note
Coplanar transmitter configurations measuring gage pressure and process
temperature (measurement 5) will report as the pressure as differential pressure.
This will be reflected on the LCD display, nameplate, digital interfaces, and other
user interfaces.
Reference Manual Operation and Maintenance
00809-0100-4803 October 2018
Emerson.com/Rosemount 109
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