Emerson 00825-0100-4716, 3095 manual Trim The Transmitter, Zero Trim, Using the Field Communicator

Quick Installation Guide

00825-0100-4716, Rev DA October 2009

Rosemount 3095 MultiVariable

STEP 6: TRIM THE TRANSMITTER

NOTE

Transmitters are shipped from Emerson Process Management fully calibrated and configured for the application when C2 Option is ordered. Without C2 Option, configuration will be by the factory default (span = upper range limit for FOUNDATION fieldbus transmitters).

Zero Trim

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

Using the Field Communicator

1.Equalize the transmitter and connect Field communicator.

2.At the menu, input the Fast Key sequence.

3.Follow the commands to perform a zero trim.

Fast Keys	Steps
1, 2, 2, 1, 1	Trim DP Offset (Zero)
1, 2, 2, 1, 2	Trim SP Offset (Zero), (AP, GP)

4.Once the zero trim is complete, verify that the high side block valve is open, close the equalize valve tightly, then open the low side block valve.

Using the Foundation Fieldbus AI Block

For zero errors greater than the allowable zero trim, compensate for the offset by using the XD_Scaling, Out_Scaling and Indirect L_Type.

Using the Foundation Fieldbus Host System

Perform a Zero Trim method if the host system supports methods associated with the TRANSDUCER 1400 block. Otherwise, if the host system does not support methods see the 3095 Manual (00809-0100-4716).

NOTE

For Absolute Pressure (AP) Sensor: If open to atmosphere, reading should be at atmospheric pressure (roughly 12 - 15 psi (0.8 - 1.0 bar), not zero. Use a barometer that is four times as accurate as the 3095 AP sensor.

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