89
Reference Manual
00809-0100-4803, Rev GA
Operation and Maintenance
September 2017
Operation and Maintenance
4.3 Transmitter calibration
4.3.1 Calibration overview
Complete configuration and calibration of the Rosemount 3051SMV involves the following tasks:
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 (page 90)
Zero or lower sensor trim (page 91)
Calibrate the 4–20 mA output
4–20 mA analog trim (page 95); or
4–20 mA scaled output trim (page 95)
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
Data flow can be summarized in four major steps:
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.
Measured
process
inputs
DP
P
T
A/D
Micro D/A
Analog mA output
(primary variable)
Digital HART variables
(primary, 2nd, 3rd, and 4th)
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