Trim The Transmitter - Emerson Rosemount 3051S Series Quick Start Manual

December 2018
7

Trim the transmitter

Transmitters are shipped fully calibrated per request or by the factory default
of full scale (lower range value = zero, upper range value = upper range limit).
7.1 Zero Trim
Prerequisites
Choose your trim procedure
1. Analog zero trim - sets the analog output to 4 mA.
2. Digital zero trim - recalibrates the sensor zero.
7.1.1 Use the Field Communicator
About this task
Fast Keys: 3, 4, 1, 1, 3
Procedure
1. Equalize or vent the transmitter and connect Field Communicator.
2. At the menu, input the Fast Key sequence.
3. Follow the commands to perform a zero trim.
7.1.2 Use the transmitter zero adjustment button
About this task
This procedure is to adjust the lower range point (i.e. the pressure value
represented by 4 mA).
Procedure
Push and hold the zero adjustment button for at least two seconds but no
longer than ten seconds.
Quick Start Guide
a. Also referred to as a "rerange", it sets the lower value range
(LRV) equal to the measured pressure.
b. The display and digital HART output remains unchanged.
a. The LRV is unaffected. The pressure value will be zero (on
display and HART output)/ 4 mA point may noy be at zero.
b. The transmitter must be within 3 percent of URL from factory
calibrated zero pressure in order to calibrate the zero function.
Quick Start Guide
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