Rosemount 8712D Series User manual

www.rosemount.com

¢00825-0100-4729j¤

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003 Rosemount 8712D / 8700 Series

Rosemount Magnetic Flowmeter

Systems (Transmitter and Flowtube)

Start

Step 1: Pre-Installation

Step 2: Wiring

Step 3: Basic Configuration

Step 4: Handling

Step 5: Mounting

Step 6: Installation (Flanged Flowtubes)

Step 6: Installation (Wafer Flowtubes)

Step 6: Installation (Sanitary Flowtubes)

Step 7: Grounding

Product Certificates

Step 8: Process Leak Protection (Optional)

Step 9: Power up the Transmitter

Step 10: Check Process Connections

Step 11: Confirm Configuration

End

4661_revAA_qig.fm Page 1 Monday, November 10, 2003 1:29 PM

Rosemount 8712D / 8700 Series

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003

IMPORTANT NOTICE

This installation guide provides basic guidelines for the

Rosemount®8712D. It does not provide instructions for detailed

configuration, diagnostics, maintenance, service and

troubleshooting installations. Refer to the 8712D reference manual

(document number 00809-0100-4661) for more instruction. 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 flowtube and transmitter is

consistent with the appropriate FM or CSA approval.

Do not connect a Rosemount 8712D to a non-Rosemount flowtube

that is located in an explosive atmosphere.

Rosemount Inc.

12001 Technology Drive

Eden Prairie, MN USA

55344

T (US) (800) 999-9307

T (Intnl) (952) 906-8888

F (952) 949-7001

Emerson Process Management

Wiltonstraat 30

3905 KW Veenendaal

The Netherlands

T +31(0)318 495 555

F +31(0)318 495 556

4661_revAA_qig.fm Page 2 Monday, November 10, 2003 1:29 PM

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003 Rosemount 8712D / 8700 Series

WARNING

Explosions could result in death or serious injury:

Installation of this transmitter in an explosive environment must be

in accordance with the appropriate local, national, and international

standards, codes, and practices. Please review the approvals

section of the 8712D reference manual for any restrictions

associated with a safe installation.

• Before connecting a HART-based communicator in an explosive

atmosphere, make sure the instruments in the loop are installed

in accordance with intrinsically safe or non-incendive field wiring

practices.

Electrical shock can result in death or serious injury

• Avoid contact with the leads and terminals. High voltage that

may be present on leads can cause electrical shock.

WARNING

The flowtube liner is vulnerable to handling damage. Never place

anything through the flowtube for the purpose of lifting or gaining

leverage. Liner damage can render the flowtube useless.

To avoid possible damage to the flowtube 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 flowtube ends are often used for protection.

Correct flange bolt tightening is crucial for proper flowtube 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 flowtube lining and possible flowtube

replacement.

4661_revAA_qig.fm Page 3 Monday, November 10, 2003 1:29 PM

Rosemount 8712D / 8700 Series

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003

STEP 1: PRE-INSTALLATION

Before installing the Rosemount 8712D 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 8712D 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 transmitter should be mounted in an

manner that prevents moisture in conduit from collecting in the

transmitter.

The 8712D is mounted separately from the flowtube, it

is not subject to limitations that might apply to the flowtube.

Figure 1. Rosemount 8712D Dimensional Drawing

4.31

(109)

LOI Cover

Standard

Cover 3.51

(89)

2.96

(75)

11.15

(283)

3.11

(79)

12.02

(305)

0.44

(11)

With LOI Cover

9.01

(229) 2.81

(71)

4661_revAA_qig.fm Page 4 Monday, November 10, 2003 1:29 PM

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003 Rosemount 8712D / 8700 Series

Environmental Considerations

To ensure maximum transmitter life, avoid excessive heat and

vibration. Typical problem areas:

• high-vibration lines with integrally mounted transmitters

• 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 provides easy

access for configuration or service.

Rosemount 8712D transmitters require external power and there must

be access to a suitable power source.

Installation Procedures

Rosemount 8712D 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 8712D to the mounting plate using the mounting screws.

Surface Mounting

To surface mount the transmitter:

1. Attach the 8712D to the mounting location using the mounting

screws.

4661_revAA_qig.fm Page 5 Monday, November 10, 2003 1:29 PM

Rosemount 8712D / 8700 Series

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003

Identify Options and Configurations

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

control of the flowtube coils. Other applications may require one or

more of the following configurations or options:

• Multidrop Communications

• PZR (Positive Zero Return)

• Auxiliary Output

• 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 8712D 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.

Electrical Considerations

Before making any electrical connections to the 8712D, consider the

following standards and be sure to have the proper power supply,

conduit, and other accessories.

Failure Alarm Mode: HIGH

Internal/External Analog Power: INTERNAL

Transmitter Security: OFF

4661_revAA_qig.fm Page 6 Monday, November 10, 2003 1:29 PM

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003 Rosemount 8712D / 8700 Series

STEP 2: WIRING

Conduit Ports and Connections

Both the flowtube and transmitter junction boxes have ports for ¾-inch

NPT conduit connections. These connections should be made in

accordance with local or plant electrical codes. Unused ports should

be sealed with metal plugs. Proper electrical installation is necessary

to prevent errors due to electrical noise and interference. Separate

conduits are not necessary for the two cables, but a dedicated conduit

line between each transmitter and flowtube is required. Shielded cable

must be used for best results in electrically noisy environments.

Conduit Cables

Run the appropriate size cable through the conduit connections in your

magnetic flowmeter system. Run the power cable from the power

source to the transmitter. Run the coil drive and electrode cables

between the flowmeter and transmitter. Prepare the ends of the coil

drive and electrode cables as shown in Figure 2. Limit the unshielded

wire length to 1-inch on both the electrode and coil drive cables.

Excessive lead length or failure to connect cable shields can create

electrical noise resulting in unstable meter readings.

4661_revAA_qig.fm Page 7 Monday, November 10, 2003 1:29 PM

Rosemount 8712D / 8700 Series

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003

Step 2.1 Transmitter Coil Input

This wiring section covers supplying power to the flowtube coils

through the transmitter. The transmitter coil input power sends a

pulsed DC frequency to the flowtube.

Figure 2. Cable Preparation Detail

Figure 3. Transmitter Power Connections

8705_0041a.eps

NOTE

Dimensions are in

inches (millimeters).

1.00

(26)

Cable Shield

8712/8712e01c.eps

4661_revAA_qig.fm Page 8 Monday, November 10, 2003 1:29 PM

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003 Rosemount 8712D / 8700 Series

Wire the transmitter according to local electrical requirements. Ground

the transmitter cage via the threaded conduit connection (see

Figure 2). For ac power applications, connect ac Neutral to terminal N

and connect ac Line to terminal L1. For dc power applications,

properly connect the positive and negative terminals. Units powered

by 12-42 V dc power supply may draw up to 1 amp of current. In

addition, follow the supply wire and disconnect requirements below:

Supply Wire Requirements

Use 12 to 18 AWG wire rated for the proper temperature application.

For connections in ambient temperatures above 140 °F (60 °C), use a

wire rated for at least 176 °F (80 °C). For ambients greater than 176 °F

(80 °C), use a wire rated for at least 230 °F (110 °C).

Disconnects

Connect the device through an external disconnect or circuit breaker.

Clearly label the disconnect or circuit breaker and locate it near

the transmitter and per local electrical control.

Figure 4. Power Supply Current

1.0

0.8

0.6

0.4

0.2

010 20 30 40 50

Power Supply (Volts)

Supply Current (Amps)

4661_revAA_qig.fm Page 9 Monday, November 10, 2003 1:29 PM

Rosemount 8712D / 8700 Series

Quick Installation Guide

00825-0100-4661, Rev AA

November 2003

Installation Category

The installation category for the Rosemount 8712D is (Overvoltage)

Category II.

Overcurrent Protection

The Rosemount 8712D Flowmeter Transmitter requires overcurrent

protection of the supply lines. Maximum ratings of overcurrent devices

are as follows:

Requirements for 115 V ac or 230 V ac Power Supply

Wire the transmitter according to local electrical requirements for

90 - 250 V AC. In addition, follow the supply wire and disconnect

requirements below:

Requirements for 12-42 V dc Power Supply

Units powered with 12-42 V DC may draw up to 1 amp of current. As a

result, the input power wire must meet certain gauge requirements.

For combinations not shown, you can calculate the maximum distance

given the supply current, the voltage of the source, and the minimum

start-up voltage of the transmitter, 12 V DC, using the following

equation:

Power

System Fuse Rating Manufacturer

12-42 V DC 250 V; 3 Amp, Quick Acting Bussman AGCI or Equivalent

90-250 V AC 250 V; 1 Amp, Quick Acting Bussman AGCI or Equivalent

MaximumResis cetan SupplyVoltage 12Vdc–

SupplyCurrent

--------------------------------------------------------------------=

4661_revAA_qig.fm Page 10 Monday, November 10, 2003 1:29 PM

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