Emerson Trim The Transmitter, Zero Trim, Rosemount 3051S, Quick Installation Guide, Steps

Quick Installation Guide

00825-0100-4801, Rev HA February 2008

Rosemount 3051S

STEP 6: 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).

Zero Trim

A zero trim is a single-point adjustment used for compensating mounting position and line pressure effects. When performing a zero trim, ensure that the equalizing valve is open and all wet legs are filled to the correct level.

If zero offset is less than 3% of true zero, follow the “Using the HART Communicator” instructions below to perform a zero trim. If zero offset is greater than 3% of true zero, follow the “Using the Transmitter Zero Adjustment Button” instructions below to rerange. If hardware adjustments are not available, see the 3051S Reference Manual (document number 00809-0100-4801) to perform a rerange using the HART Communicator.

Using the HART Communicator

HART Fast Keys	Steps
1, 2, 3, 3, 1	1.	Equalize or vent the transmitter and connect HART
		communicator.
	2.	At the menu, input the HART Fast Key sequence.
	3.	Follow the commands to perform a zero trim.

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