Analog Output Trim; Digital-To-Analog Trim - Emerson Rosemount 3051 Reference Manual

Reference Manual
00809-0100-4001, Rev JA
a.
5.
If the AO reading does not match the digital readout device (with high-accuracy test
equipment), perform an analog output trim. See
4.4

Analog output trim

The Analog Output Trim commands allow you to adjust the transmitter's current output at the 4
and 20 mA (1 and 5 Vdc) points to match the plant standards. This command adjusts the digital
to analog signal conversion.
Figure 4-2. Output trim
4.4.1

Digital-to-Analog trim

Field communicator
Traditional 4-20 mA Fast Keys
Traditional 1-5 Vdc Fast Keys
Device Dashboard Fast Keys
To perform a digital-to-analog trim with a Field Communicator, perform the following
procedure.
Operation and maintenance
If the pressure reading does not match the applied pressure (with high-accuracy test
equipment), perform a sensor trim. See
determine which trim to perform.
Compare the Analog Output (AO) line, on the Field Communicator or AMS, to the
digital readout device.
Section 4: Operation and Maintenance
"Sensor trim overview" on page 81
"Analog output trim" on page
1, 2, 3, 2, 1
1, 2, 3, 2, 1
3, 4, 2
November 2012
to
77.
77