Emerson 3051S Especificações descarregar pdf (Página 18)

May 2015

Quick Start Guide

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 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 Field

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 Field

Communicator.

Using the Field Communicator

1. Equalize or vent the transmitter and connect Field Communicator.

2. At the menu, input the Fast Key sequence (refer to Ta bl e 1 or Ta bl e 2 ).

3. Follow the commands to perform a zero trim.

Using the transmitter zero adjustment button

Push and hold the zero adjustment button for at least two seconds but no longer

than ten seconds.

Figure 15. Transmitter Adjustment Buttons

A. Zero

B. Span

Safety instrumented systems installation

For Safety Certified installations, refer to the 3051S Product Manual (document

number 00809-0100-4801) for installation procedure and system requirements.

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Emerson 3051S Especificações Página 18