Analog Output Trim - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4101
4. Calculate the stability per month.
5. Calculate calibration frequency.
4.2.2 Choosing a trim procedure
To decide which trim procedure to use, you must first determine whether the analog-
to-digital section or the digital-to-analog section of the transmitter electronics need
calibration. Refer to
Procedure
1. Connect a pressure source, a HART
2. Establish communication between the transmitter and the HART Communicator.
3. Apply pressure equal to the upper range point pressure.
4. Compare the applied pressure to the pressure process variable valve on the Process
5. Compare the Analog Output (AO) line, on the HART Communicator or AMS, to the
4.3

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.
(2) Zero static pressure effect removed by zero trimming at line pressure.
Reference Manual
Where:
Reference Accuracy = ± 0.065% of span
Ambient Temperature Effect =
Span Static Pressure Effect
maxium span
Figure 4-1 and perform the following procedure:
device to the transmitter.
Variables menu on the HART Communicator or the Process Variables screen in AMS.
For instructions on how to access process variables, see Configuration.
a) If the pressure reading does not match the applied pressure (with high-
accuracy test equipment), perform a sensor trim. See
to determine which trim to perform.
digital readout device.
If the AO reading does not match the digital readout device (with high-accuracy test
equipment), perform an analog output trim. See
(2) = 0.1% reading per 1000 psi (69 bar) = ±0.05% of span at
Communicator or AMS, and a digital readout
®
Analog output
Operation and Maintenance
March 2024
Sensor trim overview
trim.
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