Choosing A Trim Procedure - Emerson Rosemount 2051 Reference Manual

Rosemount 2051
Choosing a Trim
Procedure
4-6
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 Figure 4-1 and perform the following
procedure:
1. Connect a pressure source, a HART Communicator or AMS, and a
digital readout device to the transmitter.
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 Variables menu on the HART Communicator or the Process
Variables screen in AMS. For instructions on how to access process
variables, see page 3-7 of Section 3: Configuration.
a. If the pressure reading does not match the applied pressure (with
high-accuracy test equipment), perform a sensor trim. See "Sensor
Trim Overview" on page 4-10 to determine which trim to perform.
5. Compare the Analog Output (AO) line, on the HART Communicator or
AMS, to the 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 "Analog
Output Trim" on page 4-7.
Reference Manual
00809-0100-4101, Rev AA
July 2008