Emerson Rosemount 3051S MultiVariable Reference Manual page 116

Operation and Maintenance
October 2018
Figure 4-5: Calibration - Analog Calibration Tab
Analog output trim
The Analog Output Trim commands allow the user to adjust the transmitter's current
output at the 4 and 20 mA points to match the plant standards. This command adjusts the
digital to analog signal conversion, see
To perform an analog trim, select the Analog Trim button and follow the on-screen
prompts.
Scaled analog output trim
The scaled analog trim command matches the 4 and 20 mA points to a user selectable
reference scale other than 4 and 20 mA (for example, 1 to 5 volts if measuring across a 250
ohm load, or 0 to 100 percent if measuring from a Distributed Control System [DCS]). To
perform a scaled analog trim, connect an accurate reference meter, select the Scaled
Analog Trim button, and follow the on-screen prompts.
Note
Use a precision resistor for optimum accuracy. When adding a resistor to the loop, ensure
that the power supply is sufficient to power the transmitter to a 23 mA (maximum high
alarm) output with the additional loop resistance.
Analog output loop test
Mass and energy flow Fast Keys
Direct process variable output Fast Keys
Under the Analog Output Verify heading, a Loop Test can be performed by selecting the
Loop Test button. The loop test command verifies the output of the transmitter, the
integrity of the loop, and the operations of any recorders or similar devices installed in the
loop.
116
Figure 4-5.
1, 2, 2
1, 2, 2
Rosemount 3051S Multivariable Transmitter
Reference Manual
00809-0100-4803