Rosemount Supplemental Guide: Replacing a Rosemount 8712H Transmitter with a Rosemount 8782 Transmitter Manuals & Guides

Supplemental Guide

00825-1100-8782, Rev AB

December 2020

Replacing a Rosemount™ 8712H
Transmitter with a Rosemount 8782
Transmitter

Wiring to an existing Rosemount 8707
sensor

Supplemental Guide December 2020

1 Safety

WARNING

• Failure to follow these installation guidelines could result in serious injury

or death.

• Installation and servicing instructions are for use by qualified personnel

only. Do not perform any servicing other than that contained in the
operating instructions, unless qualified.

• Potential electrostatic charging hazard: Rosemount Magnetic flow

meters ordered with non-standard paint options or non-metallic labels
may be subject to electrostatic discharge. To avoid electrostatic charge
build-up, do not rub the flow meter with a dry cloth or clean with
solvents.

• Verify that the operating environment of the sensor and transmitter is

consistent with the appropriate Agency Approval.

• If installed in an explosive atmosphere, verify that the device certification

and installation techniques are suitable for that particular environment.

• To prevent ignition of flammable or combustible atmosphere,

disconnect power before servicing circuits.

• Explosion hazard: Do not disconnect equipment when a flammable or

combustible atmosphere is present.

• Do not connect a Rosemount 8782 Transmitter to a non-Rosemount

sensor.

• Follow national, local, and plant standards to properly earth ground the

transmitter and sensor. The earth ground must be separate from the
process reference ground.

• Shock hazard: Shut off power before servicing. Do not operate without

power compartment cover.

2 Replacing a Rosemount™ 8712H transmitter with a Rosemount 8782 transmitter

December 2020 Supplemental Guide

CAUTION

• The sensor liner is vulnerable to handling damage. Liner damage can

render the sensor useless. Failure to observe these instructions could
result in severe damage to the sensor lining and possible sensor
replacement.

• To avoid possible damage to the sensor liner ends:
— Do not use metallic or spiral-wound gaskets. If spiral wound or

metallic gaskets are required for the application, lining protectors
must be used.

— If frequent removal is anticipated, attach short spool pieces to the

sensor ends.

— Tighten bolts in the proper sequence to the specified torque limits.

Correct flange bolt tightening is crucial for proper sensor operation
and life.

• In cases where high voltage/high current are present near the meter

installation, ensure proper protection methods are followed to prevent
stray voltage/current from passing through the meter. Failure to
adequately protect the meter could result in damage to the transmitter
and lead to meter failure.

• Completely remove all electrical connections from both sensor and

transmitter prior to welding on the pipe. For maximum protection of the
sensor, consider removing it from the pipeline.

Supplemental Guide 3

Supplemental Guide December 2020

2 Introduction

This document provides specific instructions for replacing a Rosemount
8712H transmitter with a Rosemount 8782 Magnetic Slurry wall-mount
transmitter, when used with a Rosemount 8707 sensor only.

• For additional transmitter installation information, configuration,

maintenance, and troubleshooting, refer to the Rosemount™ 8782

Magnetic Slurry Flow Meter with HART Protocol Reference Manual

• For sensor installation refer to the Rosemount™ 8700 Series Magnetic

Flowmeter Sensors Reference Manual

All user documentation can be found at www.emerson.com. For more
contact information see Emerson Flow customer service.

2.1 Return policy

Emerson procedures must be followed when returning equipment. These
procedures ensure legal compliance with government transportation
agencies and help provide a safe working environment for Emerson
employees. Failure to follow Emerson procedures will result in your
equipment being refused delivery.

4 Replacing a Rosemount™ 8712H transmitter with a Rosemount 8782 transmitter