Trim The Transmitter - Emerson Rosemount 3051 Series Quick Start Manual

Quick Start Guide
7

Trim the transmitter

Note
Transmitters are shipped fully calibrated per request or by the
factory default of full scale (span = upper range limit).
7.1 Zero trim
A zero trim is a single-point adjustment used for compensating
mounting position effects. When performing a zero trim, ensure the
equalizing valve is open and all wet legs are filled to the correct level.
There are two methods to compensate for mounting effects:
• Zero Trim
• Using the transmitter zero adjustment buttons
The zero trim will affect the 4–20 mA value, the HART PV, and the
display value.
7.1.1 For HART communicator
Procedure
1. Equalize or vent the transmitter and connect Field
Communicator.
2. Navigate to Maintenance → Calibration → Pressure →
Calibration → Zero Sensor Trim
3. Follow the commands to perform a zero trim.
7.1.2 For Quick Service buttons
Procedure
1. Locate the external buttons under the top nameplate as
shown in
2. Press either button to wake the menu.
3. Follow the on screen prompt by pressing the other button.
4. Once on the Quick Service Button main menu, use the scroll
and enter buttons to navigate to the Zero menu.
7.1.3 Using the transmitter zero adjustment buttons
Using the transmitter zero adjustment buttons, the lower range value
(LRV) will be set to the pressure applied to the transmitter. This
adjustment will affect the 4–20 mA value only. Perform the following
steps to perform a rerange using the zero adjustment buttons.
22
Figure 7-1.
March 2023
Emerson.com/Rosemount