Emerson Rosemount 8712EM Quick Start Manual

Quick Start Guide

00825-0100-4445, Rev AB

November 2017

Rosemount® 8712EM Transmitter with
HART Protocol

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.

• Rosemount Magnetic Flowmeters 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 flowmeter 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 Transmitter to a non-Rosemount sensor

when installed in an “Ex” environment, explosive atmosphere, hazardous
area, or classified area.

• 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.

CAUTION!

• 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.

Quick Start Guide

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2 Rosemount 8712EM Transmitter with HART Protocol

2 Introduction

This document provides basic installation guidelines for the Rosemount
8712EM wall-mount transmitter.

• For sensor installation refer to the Rosemount® 8700 Magnetic Flowmeter

Sensor Quick Installation Guide

• For additional installation information, configuration, maintenance, and

troubleshooting, refer to the Rosemount® 8712EM Transmitter with HART

Protocol Reference Manual

All user documentation can be found at www.emerson.com. For more contact
information see Section 2.2.

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.

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2.2 Emerson Flow customer service

Email:

• Worldwide: [e-mail]

• Asia-Pacific: [e-mail]

Telephone:

North and South America Europe and Middle East Asia Pacific

United States 800 522 6277 U.K. 0870 240 1978 Australia 800 158 727

Canada +1 303 527

5200

The Nether­lands

[phone]
666

New Zealand 099 128 804

Mexico [phone]

111

France 0800 917 901 India 800 440 1468

Argentina [phone]

7000

Germany 0800 182 5347 Pakistan 888 550 2682

Brazil [phone]

8000

Italy 8008 77334 China [phone]

9000

Venezuela [phone]

3446

Central & East­ern

[phone]
111

Japan +81 3 5769

6803

Russia/CIS +7 495 981

9811

South Korea +82 2 3438

4600

Egypt 0800 000 0015 Singapore [phone]

Oman 800 70101 Thailand 001 800 441

6426

Qatar 431 0044 Malaysia 800 814 008

Kuwait 663 299 01

South Africa 800 991 390

Saudi Arabia 800 844 9564

UAE 800 0444 0684

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4 Rosemount 8712EM Transmitter with HART Protocol

3 Pre-installation

Before installing the transmitter, there are several pre-installation steps that
should be completed to make the installation process easier:

• Identify options and configurations that apply to your application

• Set the hardware switches if necessary

• Consider mechanical, electrical, and environmental requirements

Note

Refer to the product reference manual for more detailed requirements.

Identify options and configurations

The typical transmitter installation includes a device power connection, a
4-20mA output connection, and sensor coil and electrode connections.
Other applications may require one or more of the following configurations
or options:

• Pulse output

• Discrete input/discrete output

• HART multidrop configuration

Hardware switches

The transmitter may have up to four user-selectable hardware switches.
These switches set the alarm mode, internal/external analog power, internal/
external pulse power, and transmitter security. The standard configuration
for these switches when shipped from the factory is as follows:

Hardware switch default settingsTable 3-1:

Setting Factory configuration

Alarm mode High

Internal/external analog power Internal

Internal/external pulse power External

Transmitter security Off

The analog power switch and pulse power switches are not available when
ordered with intrinsically safe output, ordering code B.

In most cases, it is not necessary to change the setting of the hardware
switches. If the switch settings need to be changed, refer to the product
reference manual.

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Quick Start Guide 5

Be sure to identify any additional options and configurations that apply to the
installation. Keep a list of these options for consideration during the
installation and configuration procedures.

Mechanical considerations

The mounting site for the transmitter should provide enough room for
secure mounting, easy access to conduit entries, full opening of the
transmitter covers, and easy readability of the Local Operator Interface (LOI)
screen (if equipped).

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6 Rosemount 8712EM Transmitter with HART Protocol

Rosemount 8712EM Dimensional DrawingFigure 3-1:

A

B

9.0

[229]

3.12
[79]

3.51
[89]

12.03
[306]

11.15
[283]

17.68
[449]

11.36
[289]

1.59
[40]

1.94
[49]

1.94
[49]

1.70
[43]

7.80

[198]

3.90
[99]

2.81
[71]

D

C

A. Conduit entry, 1/2-14 NPT (4 places)
B. Ground lug
C. LOI keypad cover
D. Lower cover opens for electrical connections

Note

Dimensions are in inches [Millimeters]

Electrical considerations

Before making any electrical connections to the transmitter, consider
national, local, and plant electrical installation requirements. Be sure to have

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Quick Start Guide 7

the proper power supply, conduit, and other accessories necessary to comply
with these standards.

The transmitter requires external power. Ensure access to a suitable power
source.

Electrical DataTable 3-2:

Rosemount 8712EM Flow Transmitter

Power input AC power:

90–250VAC, 0.45A, 40VA

Standard DC power:
12–42VDC, 1.2A, 15W

Low power DC:
12–30VDC, 0.25A, 3W

Pulsed circuit Internally powered (Active): Outputs up to

12VDC, 12.1mA, 73mW
Externally powered (Passive): Input up to

28VDC, 100mA, 1W

4-20mA output circuit Internally Powered (Active): Outputs up to

25mA, 24VDC, 600mW
Externally Powered (Passive): Input up to

25mA, 30VDC, 750mW

Um 250V

Coil excitation output 500mA, 40V max, 9W max

Environmental considerations

To ensure maximum transmitter life, avoid extreme temperatures and
excessive vibration. Typical problem areas include the following:

• Tropical or desert installations in direct sunlight

• Outdoor installations in arctic climates

Remote mounted transmitters may be installed in the control room to
protect the electronics from the harsh environment and to provide easy
access for configuration or service.

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8 Rosemount 8712EM Transmitter with HART Protocol

4 Mounting

Wall mount transmitters are shipped with mounting hardware for use on a 2­in. pipe or flat surface.

Mounting bracketFigure 4-1:

A

B

C

A. U-bolt
B. Saddle clamp
C. Fasteners

4.1

Pipe mounting

1. Attach the saddle clamp to the pipe using the U-bolt mounting hardware.

2. Attach the transmitter to the saddle clamp assembly with appropriate
fasteners.

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Quick Start Guide 9

4.2 Surface mounting

Attach the transmitter to the mounting location using customer supplied
mounting screws. The installation of the transmitter shall be rated for four (4)
times the weight of the transmitter or 44lbs ( 20kgs).

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10 Rosemount 8712EM Transmitter with HART Protocol