Rosemount 8712E Manuel utilisateur

www.rosemount.com

Quick Installation Guide

00825-0100-4664, Rev BB

January 2013 Rosemount 8712 / 8700 Series

Start

Step 1: Pre-Installation

Step 2: Handling

Step 3: Mounting

Step 4: Installation

(Flanged Sensors)

(Wafer Sensors)

(Sanitary Sensors)

Step 5: Grounding

Step 6: Wiring

Step 7: Basic Configuration

Product Certifications

End

Rosemount 8712E Magnetic Flowmeter System

(Transmitter and Sensor)

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Quick Installation Guide

00825-0100-4664, Rev BB

January 2013

Rosemount 8712 / 8700 Series

IMPORTANT NOTICE

This document provides basic installation guidelines for the Rosemount®8712. It does

not provide instructions for detailed configuration, diagnostics, maintenance, service,

troubleshooting, explosion-proof, flame-proof, or intrinsically safe (I.S.) installations.

Refer to the Rosemount 8712 reference manual (document number 00809-0100-4664)

for more instructions. The manual and this QIG are also available electronically on

www.rosemount.com.

WARNING

Failure to follow these installation guidelines could result in death or serious

injury:

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. Verify that the operating environment of the sensor and transmitter is consistent

with the appropriate FM, CSA, ATEX, or IECEx approval.

Do not connect a Rosemount 8712 to a non-Rosemount sensor that is located in an

explosive atmosphere.

WARNING

The sensor liner is vulnerable to handling damage. Never place anything through the

sensor for the purpose of lifting or gaining leverage. Liner damage can render the sensor

useless.

To avoid possible damage to the sensor liner ends, do not use metallic or spiral-wound

gaskets. If frequent removal is anticipated, take precautions to protect the liner ends.

Short spool pieces attached to the sensor ends are often used for protection.

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

be tightened in the proper sequence to the specified torque limits. Failure to observe

these instructions could result in severe damage to the sensor lining and possible sensor

replacement.

Emerson Process Management

Rosemount Flow

7070 Winchester Circle,

Boulder, CO 80301

Tel (USA) 800 522 6277

Tel (International) +1 (303) 527 5200

Fax +1 (303) 530 8459

Emerson Process

Management Flow

Neonstraat 1

6718 WX Ede

The Netherlands

T +31 (0)318 495555

F +31(0) 318 495556

Emerson Process

Management Asia Pacific

Private Limited

1 Pandan Crescent

Singapore 128461

T (65) 6777 8211

F (65) 6777 0947/65 6777 0743

Emerson FZE

P.O. Box 17033

Jebel Ali Free Zone

Dubai UAE

Tel +971 4 811 8100

Fax +971 4 886 5465

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Quick Installation Guide

00825-0100-4664, Rev BB

January 2013 Rosemount 8712 / 8700 Series

STEP 1: PRE-INSTALLATION

Before installing the Rosemount 8712 Magnetic Flowmeter Transmitter, there are several

pre-installation steps that should be completed to make the installation process easier:

• Identify the options and configurations that apply to your application

• Set the hardware switches if necessary

• Consider mechanical, electrical, and environmental requirements

Mechanical Considerations

The mounting site for the Rosemount 8712 transmitter should provide enough room for

secure mounting, easy access to conduit ports, full opening of the transmitter covers, and

easy readability of the LOI screen (see Figure 1).

The Rosemount 8712 is mounted separately from the sensor, it is not subject to limitations

that might apply to the sensor.

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Quick Installation Guide

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January 2013

Rosemount 8712 / 8700 Series

Figure 1. Rosemount 8712 Dimensional Drawing

4.31

(109)

LOI Keypad

Cover

9.01

(229)

11.15

(283)

2.81

(71) 3.11

(79)

12.02

(305)

0.44

(11)

Ground Lug 1/2–14 NPT

Conduit

Connection

(4 Places)

WITH STANDARD COVER

NOTE

Dimensions are in inches (millimeters)

2.96

(75) WITH LOI COVER

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Quick Installation Guide

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January 2013 Rosemount 8712 / 8700 Series

Environmental Considerations

To ensure maximum transmitter life, avoid excessive heat and vibration. Typical problem

areas include:

• Warm-climate installations in direct sunlight

• Outdoor installations in cold climates

Remote mounted transmitters may be installed in the control room to protect the electronics

from the harsh environment and provide easy access for configuration or service.

Remotely mounted Rosemount 8712 transmitters require external power so there must be

access to a suitable power source.

Installation Procedures

Rosemount 8712 installation includes both detailed mechanical and electrical installation

procedures.

Mount the Transmitter

At a remote site the transmitter may be mounted on a pipe up to two inches in diameter or

against a flat surface.

Pipe Mounting

To mount the transmitter on a pipe:

1. Attach the mounting plate to the pipe using the mounting hardware.

2. Attach the 8712 to the mounting plate using the mounting screws.

Identify Options and Configurations

The standard application of the 8712 includes a 4–20 mA output and control of the sensor

coils and electrodes. Other applications may require one or more of the following

configurations or options:

• Multidrop Communications

• Digital Output

• Digital Input

• Pulse Output

Additional options may apply. Be sure to identify those options and configurations that apply

to your situation, and keep a list of them nearby for consideration during the installation and

configuration procedures.

Hardware Jumpers/Switches

The 8712 electronics board is equipped with three user-selectable hardware switches.

These switches set the Failure Alarm Mode, Internal/External Analog Power, and

Transmitter Security. The standard configuration for these switches when shipped from the

factory are as follows:

Changing Hardware Switch Settings

In most cases, it is not necessary to change the setting of the hardware switches. If you

need to change the switch settings, complete the steps outlined in the manual.

Failure Alarm Mode: HIGH

Internal/External Analog Power: INTERNAL

Transmitter Security: OFF

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Quick Installation Guide

00825-0100-4664, Rev BB

January 2013

Rosemount 8712 / 8700 Series

Electrical Considerations

Before making any electrical connections to the Rosemount 8712, consider local and plant

electrical standards and be sure to have the proper power supply, conduit, and other

accessories necessary to comply with these standards.

STEP 2: HANDLING

Handle all parts carefully to prevent damage. Whenever possible, transport the system to

the installation site in the original shipping containers. PTFE-lined sensors are shipped with

end covers that protect it from both mechanical damage and normal unrestrained distortion.

Remove the end covers just before installation.

Figure 2. Rosemount 8705 Sensor Support for Handling

½- through 4-Inch Sensors

6-Inch and Larger Sensors

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January 2013 Rosemount 8712 / 8700 Series

STEP 3: MOUNTING

Upstream/Downstream Piping

To ensure specification accuracy over widely varying process conditions, install the sensor a

minimum of five straight pipe diameters upstream and two pipe diameters downstream from

the electrode plane (see Figure 3).

Installations with reduced straight runs from 0 to 5 pipe diameters are possible. In reduced

straight pipe run installations, performance will shift to as much as 0.5% of rate. Reported

flow rates will still be highly repeatable.

Flow Direction

The sensor should be mounted so the FORWARD end of the flow arrow, shown on the

sensor identification tag, points in the direction of flow through the sensor.

Sensor Orientation

The sensor should be installed in a position that ensures the sensor remains full during

operation. Vertical installation allows upward process fluid flow and keeps the

cross-sectional area full, regardless of flow rate. Horizontal installation should be restricted

to low piping sections that are normally full. In these cases, orient the electrode plane to

within 45° of horizontal.

Figure 3. Upstream and Downstream Straight Pipe Diameters

5 Pipe Diameters 2 Pipe Diameters

Flow

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January 2013

Rosemount 8712 / 8700 Series

The electrodes in the Rosemount 8705 sensor are properly orientated when the two

measurement electrodes are in the 3 and 9 o’clock positions, as shown on the right of

Figure 4.

The electrodes in the Rosemount 8711 are properly orientated when the top of the sensor is

either vertical or horizontal, as shown in Figure 5. Avoid any mounting orientation that

positions the top of the sensor at 45° from the vertical or horizontal position.

Figure 4. Sensor Orientation

Figure 5. Rosemount 8711 Mounting Position

FLOW

45° Electrode Plane

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Quick Installation Guide

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January 2013 Rosemount 8712 / 8700 Series

STEP 4: INSTALLATION

Flanged Sensors

Gaskets

The sensor requires a gasket at each of its connections to adjacent devices or piping. The gasket

material selected must be compatible with the process fluid and operating conditions. Metallic or

spiral-wound gaskets can damage the liner. Gaskets are required on each side of a

grounding ring. All other applications (including sensors with lining protectors or a grounding

electrode) require only one gasket on each end connection.

Flange Bolts

NOTE

Do not bolt one side at a time. Tighten each side simultaneously. Example:

1. Snug left

2. Snug right

3. Tighten left

4. Tighten right

Do not snug and tighten the upstream side and then snug and tighten the downstream side.

Failure to alternate between the upstream and downstream flanges when tightening bolts

may result in liner damage.

Suggested torque values by sensor line size and liner type are listed in Table 1 for ASME

B16.5 (ANSI) and Table 2 for DIN flanges. Consult the factory if the flange rating of the

sensor is not listed. Tighten flange bolts on the upstream side of the sensor in the

incremental sequence shown in Figure 7, to 20% of the suggested torque values. Repeat

the process on the downstream side of the sensor. For sensors with more or less flange

bolts, tighten the bolts in a similar crosswise sequence. Repeat this entire tightening

sequence at 40%, 60%, 80%, and 100% of the suggested torque values or until the leak

between the process and sensor flanges stop.

Figure 6. Flanged gasket placement

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Quick Installation Guide

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January 2013

Rosemount 8712 / 8700 Series

If leakage has not stopped at the suggested torque values, the bolts can be tightened in

additional 10% increments until the joint stops leaking, or until the measured torque value

reaches the maximum torque value of the bolts. Practical consideration for the integrity of

the liner often leads the user to distinct torque values to stop leakage due to the unique

combinations of flanges, bolts, gaskets, and sensor liner material.

Check for leaks at the flanges after tightening the bolts. Failure to use the correct tightening

methods can result in severe damage. Sensors require a second tightening 24 hours after

the initial installation. Over time, sensor liner materials may deform under pressure.

Table 1. Suggested Flange Bolt Torque Values for Rosemount 8705 and 8707 High-Signal Sensors

Figure 7. Flange Bolt Torquing Sequence

Size

Code Line Size

PTFE/ETFE/PFA

liners Polyurethane/Neoprene/Linatex/Adiprene

liner

Class 150

(pound-feet) Class 300

(pound-feet) Class 150

(pound-feet) Class 300

(pound-feet)

005 0.5 inch (15 mm) 8 8 - -

010 1 inch (25 mm) 812 - -

015 1.5 inch (40 mm) 13 25 718

020 2 inch (50 mm) 19 17 14 11

030 3 inch (80 mm) 34 35 23 23

040 4 inch (100 mm) 26 50 17 32

060 6 inch (150mm) 45 50 30 37

080 8 inch (200 mm) 60 82 42 55

100 10 inch (250 mm) 55 80 40 70

120 12 inch (300 mm) 65 125 55 105

140 14 inch (350 mm) 85 110 70 95

160 16 inch (400 mm) 85 160 65 140

180 18 inch (450 mm) 120 170 95 150

200 20 inch (500 mm) 110 175 90 150

240 24 inch (600 mm) 165 280 140 250

300 30 inch (750 mm) 195 415 165 375

360 36 inch (900 mm) 280 575 245 525

8-bolt

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