Rosemount Magnetic Flow Meter Transmitter - Model 8712D Manuals & Guides

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D Magnetic

Flowmeter Transmitter

www.rosemount.com

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Rosemount 8712D Magnetic Flowmeter Transmitter

NOTICE

Read this manual before working with the product. For personal and system safety, and
for optimum product performance, make sure you thoroughly understand the contents
before installing, using, or maintaining this product.

Within the United States, Rosemount Inc. has two toll-free assistance numbers:

Customer Central

Technical support, quoting, and order-related questions.

1-800-999-9307 (7:00 am to 7:00 pm CST)

North American Response Center

Equipment service needs.

1-800-654-7768 (24 hours—includes Canada)

Outside of the United States, contact your local Rosemount representative.

The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require
nuclear-qualified hardware or products may cause inaccurate readings.

For information on Rosemount nuclear-qualified products, contact your local Rosemount
Sales Representative.

www.rosemount.com

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Table of Contents

SECTION 1 Introduction

SECTION 2 Installation

System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Transmitter Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Pre-Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Mount the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Pipe Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Surface Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Identify Options and Configurations . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Hardware Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Changing Hardware Switch Settings. . . . . . . . . . . . . . . . . . . . . 2-4

Failure Alarm Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Internal/External Analog Power . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Transmitter Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Changing Hardware Switch Settings. . . . . . . . . . . . . . . . . . . . . 2-5

Conduit Ports and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Conduit Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Transmitter Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Requirements for 90-250 V ac Power Supply . . . . . . . . . . . . . . 2-6

Requirements for 12-42 V dc Power Supply . . . . . . . . . . . . . . . 2-6

Installation Category. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Options, Considerations, and Procedures . . . . . . . . . . . . . . . . . . . . . . 2-8

Connect Transmitter Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Connect 4–20 mA Loop External Power Source . . . . . . . . . . . . . . 2-9

Connect Pulse Output Power Source. . . . . . . . . . . . . . . . . . . . . . 2-10

Connect Digital Output 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Connect Digital Input 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Flowtube Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Rosemount Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Transmitter to

Flowtube Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Conduit Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Flowtube to Remote Mount Transmitter Connections . . . . . . . . . 2-15

www.rosemount.com

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

SECTION 3 Configuration

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Installation Check and Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Flowtube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Process Fluid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Local Operator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Basic Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Display Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Totalizer Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Data Entry Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Transmitter Parameter Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Data Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Selecting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

LOI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Table Value Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Select Value Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Diagnostic Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Flow Rate Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

URV (Upper Range Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

LRV (Lower Range Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Line Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Calibration Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Detailed Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Pulse Output Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Special Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

User-Defined Volume Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Base Volume Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Conversion Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Base Time Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

User-Defined Flow Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Auxiliary Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Reverse Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Zero Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Reverse Flow Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Empty Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Empty Pipe Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Empty Pipe Trigger Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Empty Pipe Counts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Measure Gross Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Start Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Stop Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Reset Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Alarm Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Low Flow Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

TOC-2

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Coil Drive Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

5 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

37 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Control Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Normal Mode (LOI Command Only) . . . . . . . . . . . . . . . . . . . . 3-15

Filter Mode (LOI Command Only) . . . . . . . . . . . . . . . . . . . . . . 3-15

Signal Processing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Number of Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

0 to 125 Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Maximum Percent Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

0 to 100 Percent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Time Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

0 to 256 Seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Review Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Miscellaneous Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Flowtube Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Flowtube Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Transmitter Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Liner Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Electrode Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Electrode Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Flange Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Flange Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

D/A Trim and (4 20 mA Output Trim) . . . . . . . . . . . . . . . . . . . . . . 3-19

Simulate Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Scaled D/A Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Electronics Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Auto Zero Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Universal Auto Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Multidrop Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

HandHeld Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Connections and Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Basic Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Action Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Alphanumeric and Shift Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Data Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Fast Key Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Fast Key Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Menus and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Online Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

SECTION 4 Flowtube Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Flowtube Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Flowtube Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Upstream/Downstream

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

TOC-3

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Flowtube Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Flow Direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Installation (Flanged Flowtube) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Flange Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Installation

(Wafer Flowtube) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Flange Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Installation

(Sanitary Flowtube) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Alignment and Bolting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Process Leak Protection (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Standard Housing Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Relief Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Process Leak Containment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

SECTION 5 Maintenance and Troubleshooting

APPENDIX A Reference Data

APPENDIX B Approval Information

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Diagnostic Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Transmitter Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Analog Output Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Pulse Output Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Quick Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Step 1: Wiring Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Step 2: Process Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Step 3: Installed Flowtube Tests . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Step 4: Uninstalled Flowtube Tests . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-6

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-7

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . B-1

European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

ATEX Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Type n protection type in accordance with EN50 021 . . . . . . . . B-1

European Pressure Equipment Directive (PED) (97/23/EC) . . . . . B-1

Electro Magnetic Compatibility (EMC) (89/336/EEC) . . . . . . . . . . . B-2

Low Voltage Directive (93/68/EEC) . . . . . . . . . . . . . . . . . . . . . . . . B-2

Other important guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Hazardous Location Certifications . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Transmitter Approval Information . . . . . . . . . . . . . . . . . . . . . . . B-3

TOC-4

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November 2006

Rosemount 8712D

Flowtube Approval Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Factory Mutual (FM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

. . . . . . . . . . . . . . . . . Canadian Standards Association (CSA)B-4

European Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

APPENDIX C Digital Signal Processing

APPENDIX D Wiring Diagrams

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2

Auto Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2

Signal Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2

How Does It Really Work? . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-4

When Should Signal Processing Be Used? . . . . . . . . . . . . . . .C-5

Rosemount Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-3

Rosemount 8705/8707/8711 Flowtubes to Rosemount 8712D Transmitter
D-3
Rosemount 8701 Flowtube to Rosemount 8712D Transmitter . . .D-4
Rosemount 8711 Flowtube to Rosemount 8712D Transmitter . . .D-5

Connecting Flowtubes of Other Manufacturers . . . . . . . . . . . . . . .D-6

Brooks Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7

Model 5000 Flowtube to Rosemount 8712D Transmitter. . . . . . . .D-7

Model 7400 Flowtube to Rosemount 8712D Transmitter. . . . . . . .D-8

Endress And Hauser Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-9

Endress and Hauser Flowtube to Rosemount 8712D Transmitter.D-9

Fischer And Porter Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-10

Model 10D1418 Flowtube to Rosemount 8712D Transmitter . . .D-10
Model 10D1419 Flowtube to Rosemount 8712D Transmitter . . .D-11
Model 10D1430 Flowtube (Remote) to Rosemount 8712D TransmitterD­12
Model 10D1430 Flowtube (Integral) to Rosemount 8712D TransmitterD­13
Model 10D1465 and Model 10D1475 Flowtubes (Integral) to 8712D

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-14

Fischer and Porter Flowtube to Rosemount 8712D Transmitter .D-15

Foxboro Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-16

Series 1800 Flowtube to Rosemount 8712D Transmitter. . . . . . .D-16

Series 1800 (Version 2) Flowtube to Rosemount 8712D TransmitterD-17

Series 2800 Flowtube to 8712D Transmitter . . . . . . . . . . . . . . . .D-18

Foxboro Flowtube to 8712D Transmitter . . . . . . . . . . . . . . . . . . .D-19

Kent Veriflux VTC Flowtube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-20

Veriflux VTC Flowtube to 8712D Transmitter . . . . . . . . . . . . . . . .D-20

Kent Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-21

Kent Flowtube to Rosemount 8712D Transmitter . . . . . . . . . . . .D-21

Krohne Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-22

Krohne Flowtube to Rosemount 8712D Transmitter . . . . . . . . . .D-22

Taylor Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-23

Series 1100 Flowtube to Rosemount 8712D Transmitter. . . . . . .D-23

Taylor Flowtube to Rosemount 8712D Transmitter . . . . . . . . . . .D-24

Yamatake Honeywell Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-25

Yamatake Honeywell Flowtube to Rosemount 8712D TransmitterD-25

Yokogawa Flowtubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-26

Yokogawa Flowtube to Rosemount 8712D Transmitter . . . . . . . .D-26

TOC-5

Reference Manual

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November 2006

Rosemount 8712D

Generic Manufacturer Flowtubes. . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27

Generic Manufacturer Flowtube to Rosemount 8712D TransmitterD-27

Identify the Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27

Identify coil and electrode terminals . . . . . . . . . . . . . . . . . . . .D-27

Identify a chassis ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27

Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27

TOC-6

Reference Manual

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November 2006

Section 1 Introduction

System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Rosemount 8712D

SYSTEM DESCRIPTION The Rosemount

flowtube and transmitter, and measures volumetric flow rate by detecting the
velocity of a conductive liquid that passes through a magnetic field.

There are four Rosemount magnetic flowmeter flowtubes:

• Flanged Rosemount 8705

• Flanged High-Signal Rosemount 8707

• Wafer-Style Rosemount 8711

• Sanitary Rosemount 8721

There are three Rosemount magnetic flowmeter transmitters:

• Rosemount 8712

• Rosemount 8732

• Rosemount 8742

The flowtube is installed in-line with process piping — either vertically or
horizontally. Coils located on opposite sides of the flowtube create a magnetic
field. A conductive liquid moving through the magnetic field generates a
voltage at the two electrodes that is proportional to the flow velocity.

The transmitter drives the coils to generate a magnetic field and electronically
conditions the voltage detected by the electrodes. The transmitter then
amplifies and conditions the electrode signal to provide a flow signal. The
transmitter is mounted remotely from the flowtube.

®

8700 Series Magnetic Flowmeter System consists of a

www.rosemount.com

This manual is designed to assist in the installation and operation of the
Rosemount 8712D Magnetic Flowmeter Transmitter and the Rosemount 8700
Series Magnetic Flowmeter Flowtubes.

Reference Manual

00809-0100-4661, Rev AB

Rosemount 8712D

November 2006

SAFETY MESSAGES Procedures and instructions in this manual may require special precautions to

ensure the safety of the personnel performing the operations. Refer to the
safety messages listed at the beginning of each section before performing
any operations.

Attempting to install and operate the Rosemount 8705, Rosemount 8707 High-Signal, or
Rosemount 8711 Magnetic Flowtubes with the Rosemount 8712, Rosemount 8732, or
Rosemount 8742 Magnetic Flowmeter Transmitter without reviewing the instructions
contained in this manual could result in personal injury or equipment damage.

SERVICE SUPPORT To expedite the return process outside the United States, contact the nearest

Rosemount representative.

Within the United States and Canada, call the North American Response
Center using the 800-654-RSMT (7768) toll-free number. The Response
Center, available 24 hours a day, will assist you with any needed information
or materials.

The center will ask for product model and serial numbers, and will provide a
Return Material Authorization (RMA) number. The center will also ask for the
name of the process material to which the product was last exposed.

Mishandling products exposed to a hazardous substance may result in death
or serious injury. If the product being returned was exposed to a hazardous
substance as defined by OSHA, a copy of the required Material Safety Data
Sheet (MSDS) for each hazardous substance identified must be included with
the returned goods.

The North American Response Center will detail the additional information
and procedures necessary to return goods exposed to hazardous
substances.

See “Safety Information” on page 4-1 for complete warning information.

1-2

Reference Manual

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November 2006

Rosemount 8712D

Section 2 Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Transmitter Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3

Options, Considerations, and Procedures . . . . . . . . . . . . page 2-8

Flowtube Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-12

This section covers the steps required to physically install the magnetic
flowmeter. Instructions and procedures in this section may require special
precautions to ensure the safety of the personnel performing the operations.
Please refer to the following safety messages before performing any
operation in this section.

SAFETY MESSAGES This symbol is used throughout this manual to indicate that special attention

to warning information is required.

Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Please refer to
the following safety messages before performing any operation in this section.

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 hazardous area approval.

Do not connect a Rosemount 8712D to a non-Rosemount flowtube that is located in an
explosive atmosphere.

www.rosemount.com

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

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 handheld 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.

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.

TRANSMITTER SYMBOLS

Caution symbol — check product documentation for details

Protective conductor (grounding) terminal

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
2-1). The transmitter should be mounted in a 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.

2-2

Reference Manual

00809-0100-4661, Rev AB
November 2006

Figure 2-1. Rosemount 8712D Dimensional Drawing

4.31

(109)

3.51
(89)

Standard

Cover

2.96
(75)

With LOI Cover

9.01

(229)

2.81
(71)

3.11
(79)

Rosemount 8712D

With Standard Cover

0.44
(11)

11.15
(283)

12.02
(305)

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.

2-3

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

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 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:

Failure Alarm Mode: HIGH

Internal/External Analog Power: INTERNAL

Transmitter Security: OFF

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.

Definitions of these switches and their functions are provided below. If you
determine that the settings must be changed, see below.

Failure Alarm Mode

If the 8712D experiences a catastrophic failure in the electronics, the current
output can be driven high (23.25 mA) or low (3.75 mA). The switch is set in
the HIGH (23.25 mA) position when it is shipped from the factory.

Internal/External Analog Power

The Rosemount 8712D 4–20 mA loop may be powered internally
or by an external power supply. The internal/external power supply switch
determines the source of the 4–20 mA loop power.
Transmitters are shipped from the factory with the switch set
in the INTERNAL position.

The external power option is required for multidrop configurations. A 10–30 V
dc external supply is required and the 4-20mA power switch must be set to
“EXT” position. For further information on 4–20 mA external power, see
Connect 4–20 mA Loop External Power Source on page 2-9.

Transmitter Security

The security switch on the 8712D allows the user to lock out any configuration
changes attempted on the transmitter. No changes to the configuration are
allowed when the switch is in the ON position. The flow rate indication and
totalizer functions remain active at all times.

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November 2006

Rosemount 8712D

With the switch in the ON position, you may still access and review any of the
operating parameters and scroll through the available choices, but no actual
data changes are allowed. Transmitter security is set in the OFF position
when shipped from factory.

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
below:

NOTE

The hardware switches are located on the non-component side of the
electronics board and changing their settings requires opening the electronics
housing. If possible, carry out these procedures away from the plant
environment in order to protect the electronics.

1. Disconnect power to the transmitter.

2. Loosen the housing door screw and open the housing door.

3. Identify the location of each switch (see Figure 2-2).

4. Change the setting of the desired switches with a small screwdriver.

5. Close the housing door and tighten the housing door screw.

Figure 2-2. Rosemount 8712D Electronics Board and Hardware Switches

Conduit Ports and Connections

8712/8712R01A.EPS

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.

2-5

Reference Manual

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Rosemount 8712D

November 2006

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. Refer to Electrical Considerations for wire type. Prepare the
ends of the coil drive and electrode cables as shown in Figure 2-3. 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.

Figure 2-3. Cable Preparation Detail

Cable Shield

1.00
(26)

NOTE
Dimensions are in
inches
(millimeters).

8705_0041A.EPS

Electrical Considerations Before making any electrical connections to the Rosemount 8712D, consider

the following standards and be sure to have the proper power supply, conduit,
and other accessories.

Transmitter Input Power

The 8712D transmitter is designed to be powered by 90-250 V ac, 50–60 Hz
or 12–42 V dc. The seventh and eighth digits in the transmitter model number
designate the appropriate power supply requirement.

Model Number Power Supply Requirement

03 12-42 V dc
12 90-250 V ac

Supply Wire Temperature Rating

Use 12 to 18 AWG wire. For connections in ambient temperatures
exceeding 140 °F (60 °C), use wire rated to at least 194 °F (90 °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.

Requirements for 90-250 V ac Power Supply

Wire the transmitter according to local electrical requirements for the supply
voltage. In addition, follow the supply wire and disconnect requirements on
page 2-8.

2-6

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.

Reference Manual

00809-0100-4661, Rev AB
November 2006

Table 2-1. Length of Annealed Copper (cu) Wires

Rosemount 8712D

Figure 2-4 shows the surge current for each corresponding supply voltage.
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:

MaximumResis cetan

Use Table 2-1 and Table 2-2 to determine the maximum wire length allowable
for your power supply and maximum resistance.

Types of Power

Supply Wires

Wire

Gauge

20 0.01015

18 0.006385

16 0.004016

14 0.002525

12 0.001588

10 0.000999

Annealed Cu

milliohms/ft

(milliohms/m)

(0.033292)

(0.020943)

(0.013172)

(0.008282)

(0.005209)

(0.003277)

42 V dc

Supply ft (m)

1478
(451)

2349
(716)

3735

(1139)

5941

(1811)

9446

(2880)
15015

(4578)

SupplyVoltage 12– Vdc

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

Maximum Length of the Wire for Each

Corresponding Power Supply Source

Supply ft (m)

30 V dc

887

(270)
1410

(430)
2241

(683)
3564

(1087)

5668

(1728)

9009

(2747)

1amp

20 V dc

Supply ft (m)

394

(120)

626

(191)

996

(304)
1584

(483)
2519

(768)
4004

(1221)

12.5 V dc

Supply ft (m)

25
(8)

39

(12)

62

(19)

99

(30)
157

(48)
250

(76)

Table 2-2. Length of Hand-drawn Copper (cu) Wires

Types of Power

Supply Wires

Wire

Gauge

18 0.00664

16 0.004176

14 0.002626

12 0.001652

10 0.01039

Annealed Cu

milliohms/ft

(milliohms/m)

(0.021779)

(0.013697)

(0.008613)

(0.005419)

(0.003408)

Each Corresponding Power Supply Source

42 V dc

Supply ft (m)

2259
(689)

3592

(1095)

5712

(1741)

9080

(2768)
14437

(4402)

Maximum Length of the Wire for

30 V dc

Supply ft (m)

1355
(413)

2155
(657)

3427

(1045)

5448

(1661)

8662

(2641)

20 V dc

Supply ft (m)

602

(184)

958

(292)
1523

(464)
2421

(738)
3850

(1174)

12.5 V dc

Supply ft (m)

38

(11)

60

(18)

95

(29)

151

(46)

241

(73)

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00809-0100-4661, Rev AB

Rosemount 8712D

Figure 2-4. Supply Current versus Input Voltage

Installation Category The installation category for the Rosemount 8712D is

(Overvoltage) Category II.

1.0

0.8

0.6

0.4

0.2

Supply Current (Amps)

0

0

10

20 30

Power Supply (Volts)

Reference Manual

November 2006

50

40

8721/8721_B_01.EPS

Overcurrent Protection The Rosemount 8712D Flowmeter Transmitter requires overcurrent

protection of the supply lines. Maximum ratings of overcurrent devices are as
follows:

Power System Fuse Rating Manufacturer

90–250 V ac 1 Amp, Quick Acting Bussman AGCI or Equivalent

12-42 V dc 3 Amp, Quick Acting Bussman AGC3 or Equivalent

OPTIONS, CONSIDERATIONS, AND PROCEDURES

Connect Transmitter Power

If your application of the 8712D includes the use of options such as multidrop
communications, positive zero return (PZR), auxiliary output control, or pulse
output, certain requirements may apply in addition to those previously listed.
Be prepared to meet these requirements before attempting to install and
operate the Rosemount 8712D.

To connect power to the transmitter, complete the following steps.

1. Ensure that the power source and connecting cable meet the requirements outlined on page 2-7.

2. Turn off the power source.

3. Open the power terminal cover.

4. Run the power cable through the conduit to the transmitter.

5. Loosen the terminal guard for terminals L1 and N.

6. Connect the power cable leads as shown in Figure 2-5.

a. Connect ac Neutral or dc- to terminal N.

b. Connect ac Line or dc+ to terminal L1.

c. Connect ac Ground or dc Ground to the ground screw mounted on

the transmitter enclosure.

2-8

Reference Manual

00809-0100-4661, Rev AB
November 2006

Figure 2-5. Transmitter Power Connections

Fuse

ac Line or dc+

ac Ground or
dc Ground

ac Neutral or dc–

Transmitter

Power Cable

Rosemount 8712D

8712-8712E01B

Connect 4–20 mA Loop
External Power Source

The 4–20 mA output loop provides the process variable output from the
transmitter. Its signal may be powered internally or externally. The default
position of the internal/external analog power switch is in the internal position.
The user-selectable power switch is located on the electronics board.

Internal

The 4–20 mA analog power loop may be powered from the transmitter
itself. Resistance in the loop must be 1,000 ohms or less. If a Handheld
Communicator or control system will be used, it must be connected across
a minimum of 250 ohms resistance in the loop.

External

HART multidrop installations require a 10–30 V dc external power source
(see Multidrop Communications on page 3-16). If a Handheld
Communicator or control system is to be used, it must be connected
across a minimum of 250 ohms resistance in the loop.

To connect external power to the 4–20 mA loop, complete the
following steps.

1. Ensure that the power source and connecting cable meet the requirements outlined above and in Electrical Considerations on page 2-6.

2. Turn off the transmitter and analog power sources.

3. Run the power cable into the transmitter.

4. Connect –dc to Terminal 8.

5. Connect +dc to Terminal 7.

Refer to Figure 2-6 on page 2-10.

2-9

Rosemount 8712D

Figure 2-6. 4–20 mA Loop
Power Connections

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00809-0100-4661, Rev AB

November 2006

Fuse

Connect Pulse Output Power Source

+4–20 mA power

–4–20 mA power

8712-8712E01B

The pulse output function provides an isolated switch-closure frequency
signal that is proportional to the flow through the flowtube. The signal is
typically used in conjunction with an external totalizer or control system. The
following requirements apply:

Supply Voltage: 5 to 24 V dc

Load Resistance: 1,000 to 100 k ohms (typical

 5 k)

Pulse Duration: 1.5 to 500 msec (adjustable), 50% duty cycle below 1.5 msec

Maximum Power: 2.0 watts up to 4,000 Hz and 0.1 watts at 10,000 Hz

Switch Closure: solid state switch

The pulse output option requires an external power source. Complete the
following steps to connect an external power supply.

1. Ensure that the power source and connecting cable meet the requirements outlined previously.

2. Turn off the transmitter and pulse output power sources.

3. Run the power cable to the transmitter.

4. Connect –dc to terminal 6.

5. Connect +dc to terminal 5.

Figure 2-7. Connecting to a Electromechanical Totalizer/Counter

2-10

Refer to Figure 2-7 and Figure 2-8.

Electro-mecha

nical Counter

+

–

–

+ +

–

5–28 V dc

Power

Supply

8712-8712L11A

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November 2006

Figure 2-8. Connecting to a Electronic Totalizer/Counter without Integral Power Supply

Rosemount 8712D

+

–

5–28 V dc

Power
Supply

–

+

1k to 100 k

Typical  5 k

–

+

Electronic

Counter

8712-8712L11C

Connect Digital Output 1 The auxiliary output control function allows you to externally signal a zero flow

or reverse flow condition. The following requirements apply:

Supply Voltage: 5 to 28V dc

Maximum Power: 2 watts

Switch Closure: optically isolated solid state switch

If you are using auxiliary output control, you need to connect the power
source and control relay to the transmitter. To connect external power for
auxiliary output control, complete the steps:

1. Ensure that the power source and connecting cable meet the requirements outlined previously.

2. Turn off the transmitter and auxiliary power sources.

3. Run the power cable to the transmitter.

4. Connect –dc to terminal 20.

5. Connect +dc to terminal 16.

Refer to Figure 2-9.

Figure 2-9. Connect Digital Output 1 to Relay or Input to Control System

Fuse

dc+

Control Relay
or Input

dc–

8712-8712E01B

2-11

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Rosemount 8712D

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Connect Digital Input 2 The Digital Input 2 can provide positive zero return (PZR) which allows the

transmitter output to be forced to a zero flow rate signal. While in this state,
the transmitter will not react to input changes. A zero flow rate signal appears
until the PZR signal is removed.

PZR is activated by supplying a 5-28 V dc signal to terminals 9 and 10.

To connect the PZR, complete the following steps.

1. Run the 5-28 V dc signal cable to the transmitter.

2. Connect the DC leads to Terminal 9 and 10.

Refer to Figure 2-10.

Figure 2-10. Connecting Digital Input 2

Fuse

­5-28 V dc

Power Supply

system output

FLOWTUBE CONNECTIONS

+

Relay contact or control

This section covers the steps required to physically install the transmitter
including wiring and calibration.

Rosemount Flowtubes To connect the transmitter to a non-Rosemount flowtube, refer to the

appropriate wiring diagram in Appendix D: Wiring Diagrams. The calibration
procedure listed is not required for use with Rosemount flowtubes.

Transmitter to Flowtube Wiring

Flanged and wafer flowtubes have two conduit ports as shown in Figures
4-13, 4-14, 4-15, and 4-16. Either one may be used for both the coil drive and
electrode cables. Use the stainless steel plug that is provided to seal the
unused conduit port.

A single dedicated conduit run for the coil drive and electrode cables is
needed between a flowtube and a remote transmitter. Bundled cables in a
single conduit are likely to create interference and noise problems in your
system. Use one set of cables per conduit run. See Figure 2-11 for proper
conduit installation diagram and Table 2-3 for recommended cable. For
integral and remote wiring diagrams refer to Figure 2-13.

8712-8712E01H

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Rosemount 8712D

Figure 2-11. Conduit Preparation

Correct Incorrect

Power

Outputs

Power

Outputs

Coil Drive
and
Electrode
Cables

Power

Outputs

Power

Outputs

Coil Drive
and
Electrode
Cables

Table 2-3. Cable Requirements

Description Units Part Number

Signal Cable (20 AWG) Belden 8762, Alpha 2411 equivalent ftm08712-0061-0001

08712-0061-0003

Coil Drive Cable (14 AWG) Belden 8720, Alpha 2442 equivalent ftm08712-0060-0001

Combination Signal and Coil Drive Cable (18 AWG)

(1) Combination signal and coil drive cable is not recommended for

high-signal magmeter system. For remote mount installations, combination signal and coil drive cable
should be limited to less than 300 ft. (100 m).

(1)

08712-0060-0003

ftm08712-0752-0001

08712-0752-0003

Rosemount recommends using the combination signal and coil drive for N5,
E5 approved flowtubes for optimum performance.

8721/0000A01A, 0000A01B.EPS

Remote transmitter installations require equal lengths of signal and coil drive
cables. Integrally mounted transmitters are factory wired and do not require
interconnecting cables.

Lengths from 5 to 1,000 feet (1.5 to 300 meters) may be specified, and will be
shipped with the flowtube.

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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
2-12. Limit the unshielded wire length to 1-inch on both the electrode and coil
drive cables.

NOTE

Excessive lead length or failure to connect cable shields can create electrical
noise resulting in unstable meter readings.

Figure 2-12. Cable Preparation Detail

1.00 (26)

Cable Shield

NOTE
Dimensions are in
inches (millimeters).

8705-0041A

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Flowtube to Remote Mount Transmitter Connections

Figure 2-13. Wiring Diagram

Connect coil drive and electrode cables as shown in Figure 2-13.

Do not connect ac power to the flowtube or to terminals 1 and 2 of the
transmitter, or replacement of the electronics board will be necessary.

Rosemount 8712D Transmitter Rosemount 8705/8707/8711/8721 Flowtubes

11

2 2

17 17

18 18

19 19

8712_05A

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Section 3 Configuration

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

Installation Check and Guide . . . . . . . . . . . . . . . . . . . . . . page 3-2

Local Operator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3

Basic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3

LOI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-4

Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6

Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6

Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6

Detailed Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-9

Review Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-17

Miscellaneous Functions . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-17

Multidrop Communications . . . . . . . . . . . . . . . . . . . . . . . . page 3-22

HandHeld Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-22

Connections and Hardware . . . . . . . . . . . . . . . . . . . . . . . . page 3-25

Basic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-26

Menus and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-28

Rosemount 8712D

INTRODUCTION This section covers basic operation, software functionality, and configuration

procedures for the Rosemount 8712D Magnetic Flowmeter Transmitter. For
information on connecting another manufacturer’s flowtube, refer to
Appendix D: Wiring Diagrams.

The Rosemount 8712D features a full range of software functions for
configuration of output from the transmitter. Software functions are accessed
through the LOI, AMS, a Handheld Communicator (see page 3-22), or a
control system. Configuration variables may be changed at any time and
specific instructions are provided through on-screen instructions.

Table 3-1. Parameters

Set-up Parameters Page

Process Variables page 3-6

Diagnostics and Service page 5-6

Basic Setup page 3-6

Detailed Setup page 3-9

Review Variables page 3-17

Miscellaneous Functions page 3-17

Multidrop Communications page 3-22

www.rosemount.com

Rosemount 8712D

Reference Manual

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November 2006

INSTALLATION CHECK AND GUIDE

Use this guide to check new installations of Rosemount magnetic flowmeter
systems that appear to malfunction.

Before You Begin

Transmitter

Apply power to your system before making the following transmitter checks.

1. Verify that the correct flowtube calibration number is entered in the transmitter. The calibration number is listed on the flowtube nameplate.

2. Verify that the correct flowtube line size is entered in the transmitter. The line size value is listed on the flowtube nameplate.

3. Verify that the analog range of the transmitter matches the analog range in the control system.

4. Verify that the forced analog output of the transmitter produces the correct output at the control system.

Flowtube

Be sure that power to your system is removed before beginning flowtube
checks.

1. For horizontal flow installations, ensure that the electrodes remain
covered by process fluid.

For vertical or inclined installations, ensure that the process fluid
is flowing up into the flowtube to keep the electrodes covered by
process fluid.

2. Ensure that the grounding straps on the flowtube are connected to grounding rings, lining protectors, or the adjacent pipe flanges. Improper grounding will cause erratic operation of the system.

Wiring

1. The signal wire and coil drive wire must be twisted shielded cable. Emerson Process Management, Rosemount division. recommends 20 AWG twisted shielded cable for the electrodes and 14 AWG twisted shielded cable for the coils.

2. The cable shield must be connected at both ends of the electrode and coil drive cables. Connection of the shield at both ends is absolutely necessary for proper operation.

3. The signal and coil drive wires must be separate cables, unless Emerson Process Management specified combo cable is used. See Table 2-3 on page 2-13.

4. The single conduit that houses both the signal and coil drive cables should not contain any other wires.

Process Fluid

1. The process fluid conductivity should be 5 microsiemens (5 micro mhos) per centimeter minimum.

2. The process fluid must be free of air and gasses.

3. The flowtube should be full of process fluid.

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Refer to Section 5: Maintenance and Troubleshooting for further information.

LOCAL OPERATOR INTERFACE

The optional Local Operator Interface (LOI) provides an operator
communications center for the 8712D. By using the LOI, the operator can
access any transmitter function for changing configuration parameter settings,
checking totalized values, or other functions. The LOI is integral to the
transmitter housing.

BASIC FEATURES The basic features of the LOI include display control, totalizer, data entry, and

transmitter parameters. These features provide control of all transmitter
functions, see Figure 3-1.

Display Control Keys

The display control keys provide control over the variable displayed on the LOI screen. Push FLOW RATE to display the process variable, or push TOTALIZE to display the totalized value.

Totalizer Keys

The totalizer keys enable you to start, stop, read, and reset the totalizer.

Data Entry Keys

The data entry keys enable you to move the display cursor, incrementally
increase the value, or enter the selected value.

Transmitter Parameter Keys

The transmitter parameter keys provide direct access to the most common
transmitter parameters and stepped access to the advanced functions of the
8712D through the AUX. FUNCTION key.

Figure 3-1. Local Operator Interface Keypad

DISPLAY CONTROL TOTALIZER

FLOW

RATE

TUBE CAL

NO.

ANALOG
OUTPUT

RANGE

TOTALIZE

TUBE

SIZE

PULSE

OUTPUT

SCALING

START

STOP

UNITS

DAMPING XMTR

FUNCTION

TRANSMITTER PARAMETERS

READ

RESET

AUX.

INFO

DATA

ENTRY

SHIFT

INCR.

ENTER

Data Entry The LOI keypad does not have numerical keys. Numerical data is entered by

the following procedure.

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1. Access the appropriate function.

2. Use SHIFT to highlight the digit you want to enter or change.

3. Use INCR. to change the highlighted value. For numerical data,
INCR. toggle through the digits 0–9, decimal point, and dash. For
alphabetical data, toggle through the letters of the alphabet A–Z,
digits 0–9, and the symbols z,&, +, -, *, /, $, @,%, and the blank
space. (INCR. is also used to toggle through pre-determined choices
that do not require data entry.)

4. Use SHIFT to highlight other digits you want to change and change them.

5. Press ENTER.

Selecting Options To select pre-defined software options on the LOI, use the

following procedure:

1. Access the appropriate option.

2. Use SHIFT or INCR. to toggle between the applicable choices.

3. Press ENTER when the desired choice is displayed on the screen.

November 2006

LOI EXAMPLES Use the TRANSMITTER PARAMETER keys shown in Figure 3-1 to change

the parameters, which are set in one of two ways, table values or select
values.

Tabl e Value s:

Parameters such as units, that are available from a predefined list

Select Values:

Parameters that consist of a user-created number or character string, such
as calibration number; values are entered one character at a time using
the data entry keys

Table Value Example Setting the TUBE SIZE:

1. Press TUBE SIZE.

2. Press SHIFT or INCR. to increase (incrementally) the tube size to the next value.

3. When you reach the desired size, press ENTER.

4. Set the loop to manual if necessary, and press ENTER again.

After a moment, the LCD will display the new tube size and the maximum flow
rate.

Select Value Example Changing the ANALOG OUTPUT RANGE:

1. Press ANALOG OUTPUT RANGE.

2. Press SHIFT to position the cursor.

3. Press INCR. to set the number.

4. Repeat steps 2 and 3 until desired number is displayed.

5. Press ENTER.

3-4

After a moment, the LCD will display the new analog output range.

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Table 3-2. LOI Data Entry Keys and Functions

Data Entry Keys Function Performed

Shift

Increment

Enter Stores the displayed value previously selected with the SHIFT and INCR. keys

Display Control Keys Function Performed

Flow Rate Displays the user-selected parameters for flow indication

Totalize Displays the present totalized output of the transmitter, and activates the Totalizer group of keys

Start/Stop Starts the totalizing display if it is stopped, and stops the display if it is running

Read/Reset Resets the net totalizing display to zero if it is stopped, and halts the display if the display is running

Transmitter Parameters

Keys

Tube Calibration Number Identifies the calibration number when using Rosemount flowtubes, or other manufacturers’ flowtubes

Tube Size Specifies the flowtube size and identifies the corresponding maximum flow (0.1 - through 80-inch line sizes)

Units Specifies the desired units:

Auxiliary Functions Function

Analog Output Range Sets the desired 20 mA point – must set the tube size first

Pulse Output Scaling Sets one pulse to a selectable number of volume units – must set the tube size first

Damping Sets response time (single pole time constant), in seconds, to a step change in flow rate

Transmitter Information Allows you to view and change useful information about the transmitter and flowtube

Empty Pipe Tuning Allowable range 3.0 - 2000.0

• Moves the blinking cursor on the display one character to the right

• Scrolls through available values

• Increments the character over the cursor by one

• Steps through all the digits, letters, and symbols that are applicable to the present operation

• Scrolls through available values

The choices, Forward and Reverse totals or Net and Gross totals, are selected in Auxiliary Functions

Function Performed

calibrated at the Rosemount factory

Gal/Min Liters/Min
ImpGal/Min CuMeter/Hr
Ft/Sec Meters/Sec
Special (user defined)

Options

Operating Mode
Coil Pulse Mode
Flow rate Display

Totalizer Display
Signal Processing
Special Units
Aux. Output Control
Reverse Flow Enable
Universal Auto Trim

Low Flow Cutoff
Pulse Width
Analog Output Zero
Analog Output Test
Pulse Output Test
Transmitter Test
4–20 mA Output Trim
Auto Zero
Electronics Trim

Normal or Filter
5 or 37 Hz
Flow–% Span, Flow–Totalize, %Span–Totalize
Forward–Reverse or Net–Gross
On/Off
Volume units, base volume units, conversion, timebase, rate units
Reverse Flow/Zero Flow
On/Off
In-process Flowtube Calibration

0.01 ft/s to 1 ft/s
Pulse Width
4 mA Value
Analog Output Loop Test
Pulse Output Loop Test
Test the Transmitter
Adjust the 4–20 mA Output
Zero Flow Tube for 37 Hz Coil Drive Operation
Transmitter Calibration

Rosemount 8712D

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DIAGNOSTIC MESSAGES

The following error messages may appear on the LOI screen. See Table 5-1
on page 5-2 for potential causes and corrective actions for these errors:

• Electronics Failure

• Coil open circuit

• Digital trim failure

• Auto zero failure

• Auto trim failure

• Flowrate >42 ft/sec

• Analog out of range

• PZR activated

• Empty pipe

• Reverse flow

• Reverse flow indicator

(A flashing letter “R” on the LOI indicates a reverse flow)

• Totalizer indicator

(A flashing letter “T” on the LOI indicates to totalizer is activated)

PROCESS VARIABLES The process variables measure flow in several ways that reflect your needs

Fast Keys 1, 1

and the configuration of your flowmeter. When commissioning a flowmeter,
review each process variable, its function and output, and take corrective
action if necessary before using the flowmeter in a process application

Flow – The actual configured flow rate in the line. Use the Process Variable
Units function to select the units for your application.

Percent of Range – The process variable as a percentage of the Analog
Output range, provides an indication where the current flow of the meter is
within the configured range of the flowmeter. For example, the Analog Output
range may be defined as 0 gal/min to 20 gal/min. If the measured flow is 10
gal/min, the percent of range is 50 percent.

Analog Output – The analog output variable provides the analog value for the
flow rate. The analog output refers to the industry standard output in the 4–20
mA range. Check the analog output value against the actual loop reading
given by a milliameter. If it does not match, a 4–20 mA trim is required. (See
“Analog Output Test” on page 5-6).

Totalizer – Provides a reading of the total flow of the flowmeter since the
totalizer was last reset. The totalizer value should be zero during
commissioning on the bench, and the units should reflect the volume units of
the flow rate. If the totalizer value is not zero, it may need to be reset.

View Other Variables – Pulse Output provides the actual pulse reading from
the flow transmitter.

BASIC SETUP

Tag Tag is the quickest and shortest way of identifying and distinguishing between

Fast Keys 1, 3, 1

LOI Key XMTR INFO

transmitters. Transmitters can be tagged according to the requirements of
your application. The tag may be up to eight characters long.

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Flow Rate Units The flow rate units variable specifies the format in which the flow rate will be

Fast Keys 1, 3, 2, 1

LOI Key Units

displayed. Units should be selected to meet your particular metering needs.

Options for Flow Rate Units

•Gal/Min

• Liters/Min

• ImpGal/Min

• CuMeter/Hr

• Ft/Sec

• Meters/Sec

• Special (user defined, see page 3-12)

The maximum flow rate information is not updated as the available units
appear, but only after the data is entered. The maximum flow rate on the
second line of the display is for informational purposes and cannot be
changed directly by the user.

If the transmitter is totalizing, the numerator of the unit of measure is used by
the transmitter as the volumetric unit for totalization and pulse output scaling.
For example, if gal/min is selected, the Rosemount 8712D totalizes and
provides a pulse output in gallons.

URV (Upper Range Value)

Fast Keys 1, 3, 3, 2

LOI Key Analog Output

Range

The upper range value (URV), or analog output range, is preset to 30 ft/s at
the factory. The units that appear will be the same as those selected under the
units parameter.

The URV (20 mA point) can be set for both forward or reverse flow rate. Flow
in the forward direction is represented by positive values and flow in the
reverse direction is represented by negative values. The URV can be any
value from –39.3 ft/s to +39.3 ft/s (-12 m/s to +12 m/s), as long as it is at least
1 ft/s from the lower range value (4 mA point). The URV can be set to a value
less than the lower range value. This will cause the transmitter analog output
to operate in reverse, with the current increasing for lower (or more negative)
flow rates.

NOTE

Line size must be selected prior to configuration of URV. If special units are
configured before line size is selected, the communication interface may not
display the correct flow rate.

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LRV (Lower Range Value)

Fast Keys 1, 3, 4, 1

LOI Key Aux. Function

Reset the lower range value (LRV), or analog output zero, to change the size
of the range (or span) between the URV and LRV. Under normal
circumstances, the LRV should be set to a value near the minimum expected
flow rate to maximize resolution. The LRV must be between
–39.3 ft/s to +39.3 ft/s (-12 m/s to +12 m/s).

NOTE

The LRV can be set to a value greater than the URV, which will cause the
analog output to operate in reverse. In this mode, the analog output will
increase with lower (more negative) flow rates.

Example

If the URV is greater than the LRV, the analog output becomes 3.9 mA when
the flow rate falls below the selected 4 mA point.

The minimum allowable span between the URV and LRV is 1 ft/s. Do not set
the LRV within 1 ft/s of the 20 mA point. For example, if the URV is set to

15.67 ft/s and if the desired URV is greater than the LRV, then the highest
allowable analog zero setting would be 14.67 ft/s. If the desired URV is less
than the LRV, then the lowest allowable LRV would be 16.67 ft/s.

NOTE

Line size must be selected prior to configuration of LRV. If special units are
configured before line size is selected, the communication interface may not
display the correct flow rate.

Line Size The line size (tube size) must be set to match the actual flowtube connected

Fast Keys 1, 3, 5

LOI Key Tube Size

to the transmitter. The size must be specified in inches according to the
available sizes listed below. If a value is entered from a control system or
Handheld Communicator that does not match one of these figures, the value
will be rounded to match the nearest option.

The line size (inches) options are as follows:

0.1, 0.15, 0.25, 0.30, 0.50, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6,
8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 48,
54, 56, 60, 64, 72, 80

NOTE

The second line on the LOI screen, MAX FLOW, is strictly for informational
purposes.

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Calibration Number The tube calibration number is a 16-digit number used to identify flowtubes

Fast Keys 1, 3, 6

LOI Key Tube Cal No.

calibrated at the Rosemount factory. The calibration number is also printed
inside the flowtube terminal block or on the flowtube name plate. The number
provides detailed calibration information to the Rosemount 8712D. To function
properly within accuracy specifications, the number stored in the transmitter
must match the calibration number on the flowtube exactly.

NOTE

Flowtubes from manufacturers other than Rosemount Inc. can also be
calibrated at the Rosemount factory. Check the tube for Rosemount
calibration tags to determine if a 16-digit tube calibration number exists for
your flowtube.

NOTE

Be sure the calibration number reflects a calibration to a Rosemount
reference transmitter. If the calibration number was generated by a means
other than a certified Rosemount flow lab, accuracy of the system may be
compromised.
If your flowtube is not a Rosemount flowtube and was not calibrated at the
Rosemount factory, see “Universal Auto Trim” on page 3-21.

If your flowtube is imprinted with an eight-digit number or a k-factor, check in
the flowtube wiring compartment for the sixteen-digit calibration number. If
there is no serial number, contact the factory for a proper conversion.

Damping Adjustable between 0.0 and 256 seconds

Fast Keys 1, 3, 7

LOI Key Damping

Damping allows selection of a response time, in seconds, to a step change in flow rate. It is most often used to smooth fluctuations in output. (When using a 275 / 375 handheld communicator, minimum value is 0.2 seconds).

DETAILED SETUP

Pulse Output Scaling

Fast Keys 1, 4, 3, 2, 1

LOI Key Aux. Function

Transmitter may be commanded to supply a specified frequency between 1
pulse/ day at 39.37 ft/sec to 10,000 Hz at 1 ft/sec.

NOTE

Line size must be selected prior to configuration of pulse output scaling. If
special units are configured before line size is selected, the communication
interface may not display the correct flow rate.

The pulse output scaling equates one transistor switch closure pulse to a
selectable number of volume units. The volume unit used for scaling pulse
output is taken from the numerator of the configured flow units. For example,
if gal/min had been chosen when selecting the flow rate unit, the volume unit
displayed would be gallons.

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NOTE

The pulse output scaling is designed to operate between 0 and 10,000 Hz.
The electronics will not accept a conversion factor that would result in a pulse
frequency outside that range. The minimum conversion factor value is found
by dividing the upper range value (in units of volume per second) by 10,000
Hz.

When selecting pulse output scaling, remember that the maximum pulse rate
is 10,000 Hz. With the 110 percent overrange capability, the absolute limit is
11,000 Hz. For example, if you want the Rosemount 8712D to pulse every
time 0.01 gallons pass through the flowtube, and the flow rate is 10,000
gal/min, you will exceed the 10,000 Hz full-scale limit:

----------------------------------------------------------------------------- 1 6 6 6 6 . 7 H z=

10,000 gal/min

60 sec/min()×60 sec/min()

The best choice for this parameter depends upon the required resolution, the
number of digits in the totalizer, the extent of range required, and the
maximum counter input frequency.

NOTE

For totalizing on the LOI, ten digits are available.

Pulse Width The factory default pulse width is 0.5 mS.

Fast Keys 1, 4, 3, 2, 2

LOI Key Aux. Function

Figure 3-2. Pulse Output

The width, or duration, of the pulse width can be adjusted to match the requirements of different counters or controllers (see Figure 3-2). These are typically lower frequency applications (

≤1000 Hz). The transmitter will accept

values from 0.5 mS to 500mS, with the actual minimum pulse width that can
generated is 1.3 mS.

For frequencies higher than 1000 Hz, it is recommended that the pulse width
is not set and the transmitter be allowed to set the width at 50% duty cycle.

If the pulse width is set too wide (more than
transmitter will automatically default to a pulse width of 50% duty cycle.

1

/2 the period of the pulse) the

3-10

OPEN

CLOSED
Pulse
Width

Period

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Rosemount 8712D

Example

If pulse width is set to 100 mS, the maximum output is 5 Hz; for a pulse width
of 0.5 mS, the maximum output would be 1000 Hz. (At the maximum
frequency output there is a 50 percent duty cycle.)

PULSE WIDTH MINIMUM PERIOD (50% duty cycle) MAXIMUM FREQUENCY

1 Cycle

100 ms 200 ms

0.5 ms 1.0 ms

To achieve the greatest maximum frequency output, set the pulse width to the
lowest value that is consistent with the requirements of the pulse output
power source, pulse driven external totalizer, or other peripheral equipment.

Example

The maximum flow rate is 10,000 gpm. Set the pulse output scaling such that
the transmitter outputs 10,000 Hz at 10,000 gpm.

-------------------- 5 Hz=
200 mS

1 Cycle

--------------------1000Hz=

1.0 mS

Pulse Scaling

Pulse Scaling 0 .0167 gal/pulse=

1 Pulse 0.0167 gallon=

Flow Rate (gpm)

-----------------------------------------------------------=
(60 s/min)(Frequency)

10,000 gpm

----------------------------------------------------------=
(60 s/min)(10,000 Hz)

NOTE

Changes to pulse width are only required when there is a minimum pulse
width required for external counters, relays, etc.

If frequency generated by the transmitter requires a smaller pulse width than
the pulse width selected, the transmitter will automatically go to 50% duty
cycle.

Example

The external counter is ranged for 350 gpm and pulse is set for one gallon.
Assuming the pulse width is 0.5 ms, the maximum frequency output is 5.833
Hz.

Frequency

-------------------------------------------------------------- --------------------------------=
(60 s/min)(Pulse Scaling gal/pulse)

Flow Rate (gpm)

350 gpm

-----------------------------------------------------------=
(60 s/min)(1 gal/pulse)

5.833 Hz=

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November 2006

Example

The upper range value (20 mA) 3000 gpm. To obtain the highest
resolution of the pulse output, 10,000 Hz is scaled to the full scale
analog reading.

Pulse Scaling

1 Pulse 0.005 gallon=

Flow Rate (gpm)

-----------------------------------------------------------=
(60 s/min)(Frequency)

3000 gpm

--------------------------------------------------------=
(60 s/min)(10,000Hz)

0.005 gal/pulse=

Special Units The Rosemount 8712D provides a selection of standard units configurations

Fast Keys 1, 3, 2, 2

LOI Key Aux. Function

User-Defined Volume Unit

Fast Keys 1, 3, 2, 2, 1

LOI Key Aux. Function

that meet the needs of most applications (see “Flow Rate Units” on page 3-7).
If your application has special needs and the standard configurations do not
apply, the Rosemount 8712D provides the flexibility to configure the
transmitter in a custom-designed units format using the special units variable.

NOTE

Line size must be selected prior to configuration of special units. If special
units are configured before line size is selected, the communication interface
may not display the correct flow rate.

Special volume units enables you to display the volume unit format to which
you have converted the base volume units. For example, if the special units
are abc/min, the special volume variable is abc. The volume units variable is
also used in totalizing the special units flow.

Base Volume Unit Base volume unit is the unit from which the conversion is being made. Set this

Fast Keys 1, 3, 2, 2, 2

LOI Key Aux. Function

variable to the appropriate option.

Conversion Number The special units conversion number is used to convert base units to special

Fast Keys 1, 3, 2, 2, 3

LOI Key Aux. Function

units. For a straight conversion of volume units from one to another, the
conversion number is the number of base units in the new unit. For example,
if you are converting from gallons to barrels and there are 31 gallons in a
barrel, the conversion factor is 31.

Base Time Unit Base time unit provides the time unit from which to calculate the special units.

Fast Keys 1, 3, 2, 2, 4

LOI Key Aux. Function

3-12

For example, if your special units is a volume per minute, select minutes.

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November 2006

Rosemount 8712D

User-Defined Flow Unit User-defined flow unit is a format variable that provides a record of the units to

Fast Keys 1, 3, 2, 2, 5

LOI Key Aux. Function

which you are converting. The Handheld Communicator and Rosemount
8712D will display a special units designator as the units format for your
primary variable. The actual special units setting you define will not appear.
Four characters are available to store the new units designation.

Example

To display flow in barrels per hour, and one barrel of beer is equal to 31.0
gallons, the procedure would be:

Set the Volume Unit to BARL.
Set the Base Volume Unit to Gallons.
Set the Input Conversion Number to 31.
Set the Time Base to Hour.
Set the Rate Unit to BR/H.

Auxiliary Output The auxiliary output contacts (terminals 16 and 20) are software- selectable to

Fast Keys 1, 4, 3, 3

LOI Key Aux. Function

indicate a reverse flow or zero flow condition. The two terminals are actually a
transistor switch closure which must be externally powered.

Reverse Flow

Reverse flow activates the switch closure with a reverse flow. A forward flow
is defined by the proper wiring polarity and the flow direction arrow on the
flowtube.

Zero Flow

Zero flow activates the switch closure whenever the flow rate drops below the
low flow cutoff.

NOTE

When Reverse Flow is selected from this digital output, Reverse Flow must
be enabled under the Reverse Flow Enable Menu.

Reverse Flow Enable On / Off (LOI Command)

Fast Keys 1, 4, 3, 4

LOI Key Aux. Function

Enabled / Disabled (275 / 375 Handheld Communicator Command)

Reverse Flow Enable allows the transmitter to read negative flow. This may occur when flow in the pipe is going the negative direction, or when either electrode wires or coil wires are reversed. This also enables the totalizer to count in the reverse direction.

Empty Pipe On / Off (LOI Command)

Fast Keys 1, 4, 1, 7

LOI Key Aux. Function

The Empty Pipe feature can be turned ON to force the outputs to indicate zero
flow, typically to the Lower Range Value (LRV) when an empty pipe condition
is sensed.

Empty Pipe Value The read only Empty Pipe Value represents the level of the empty pipe signal.

Fast Keys Not Accessible

LOI Key Aux. Function

This unitless value is compared to the Empty Pipe Trigger level to determine if
an Empty Pipe condition exists. The value is higher when the pipe is empty,
and lower when the pipe is full.

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November 2006

Empty Pipe Trigger Level The Empty Pipe Trigger Level can be turned to actual process conditions. The

Fast Keys Not Accessible

LOI Key Aux. Function

range of this unitless level is 3-2000, with the factory default set at 100.

If the Empty Pipe Trigger Level is less then the Empty Pipe Value, the Empty
Pipe output is turned ON.

If the Empty Pipe Trigger Level is greater than or equal to the Empty Pipe
Value, the Empty Pipe output is turned OFF.

Empty Pipe Counts The Empty Pipe Counts sets the number of consecutive occurrences before

Fast Keys Not Accessible

LOI Key Aux. Function

the Empty Pipe output is turned ON or OFF. The count range is 5-50, with
factory default set at 5.

Totalizer Totalizer tallies the total amount of process fluid that has passed through the

Fast Keys 1, 1, 4

LOI Key Totalizer

flowmeter since the totalizer was last reset and enables you to change the
settings of the totalizer.

Measure Gross Total Measure gross total provides the output reading of the totalizer. This value is

Fast Keys 1, 1, 4, 1

LOI Key Totalizer

the amount of process fluid that has passed through the flowmeter since the
totalizer was last reset

Start Totalizer Start totalizer starts the totalizer counting from its current value.

Fast Keys 1, 1, 4, 4

LOI Key Totalizer

Stop Totalizer Stop totalizer interrupts the totalizer count until it is restarted again. This

Fast Keys 1, 1, 4, 5

LOI Key Totalizer

feature is often used during pipe cleaning or other maintenance operations.

Reset Totalizer Reset totalizer resets the net totalizer value to zero. The totalizer must be

Fast Keys 1, 1, 4, 6

LOI Key Totalizer

stopped before resetting.

NOTE

The totalizer value is saved in the Non-Volatile memory of the electronics
every three seconds. Should power to the transmitter be interrupted, the
totalizer value will start at the last saved value when power is re-applied.

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Rosemount 8712D

Alarm Level The alarm level allows you to drive the transmitter to preset values if an alarm

Fast Keys 1, 4, 3, 6

LOI Key Aux. Function

occurs. There are two options:

• Rosemount Alarm and Saturation Values

• NAMUR-Complaint Alarm and Saturation Levels

Table 3-3. Rosemount (Standard) Alarm and Saturation Values

Level 4-20 mA Saturation 4-20 mA Alarm

Low 3.9 mA ≤3.75 mA
High 20.8 mA ≥22.6 mA

Table 3-4. NAMUR-Compliant Alarm and Saturation Values

Level 4-20 mA Saturation 4-20 mA Alarm

Low 3.8 mA ≤3.5 mA
High 20.5 mA ≥22.6 mA

Low Flow Cutoff Low flow cutoff allows you to specify the flow rate, between 0.01 and 1.0 feet

Fast Keys 1, 4, 4, 1

LOI Key Aux. Function

per second, below which the outputs are driven to zero flow. The units format
for low flow cutoff cannot be changed. It is always displayed as feet per
second regardless of the format selected. The low flow cutoff value applies to
both forward and reverse flows.

Coil Drive Frequency Coil drive frequency allows pulse-rate selection of the flowtube coils.

Fast Keys 1, 4, 1, 3

LOI Key Totalizer

5 Hz

The standard coil pulse mode is 5 Hz, which is sufficient for nearly all
applications.

37 Hz

If the process fluid causes a noisy or unstable output, increase the coil pulse
mode to 37 Hz. If the 37 Hz mode is selected, perform the auto zero function.

Control Status Normal Mode (LOI Command Only)

LOI Key Aux. Function

The normal mode uses 5 Hz coil drive mode and does not use the signal
processing. Normal mode is usually sufficient and should be used whenever
possible.

Filter Mode (LOI Command Only)

The filter mode should be used only when the signal is noisy and gives an
unstable output. Filter mode automatically uses 37 Hz coil drive mode and
activates signal processing at the factory set default values.

When using filter mode, perform an auto zero. Either of the parameters, coil
drive mode, or signal processing, may still be changed individually.

Turning signal processing off or changing the coil pulse mode to 5 Hz will
automatically change the operating mode from filter mode to normal mode.

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Rosemount 8712D

Reference Manual

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November 2006

Signal Processing Control

Fast Keys 1, 4, 4

LOI Key Aux. Function

On/Off

When ON is selected, the Rosemount 8712D output is derived using a
running average of the individual flow inputs. Signal processing is a software
algorithm that examines the quality of the electrode signal against
user-specified tolerances. This average is updated at the rate of 10 samples
per second with a coil drive frequency of 5 Hz, and 75 samples per second
with a coil drive frequency of 37Hz. The three parameters that make up signal
processing (number of samples, maximum percent limit, and time limit) are
described below.

Number of Samples 0 to 125 Samples

Fast Keys 1, 4, 4, 5

LOI Key Aux. Function

The number of samples function sets the amount of time that inputs are
collected and used to calculate the average value. Each second is divided
into tenths (

1

/10 ) with the number of samples equaling the number of 1/10

second increments used to calculate the average.

For example, a value of:

1 averages the inputs over the past

10 averages the inputs over the past 1 second

100 averages the inputs over the past 10 seconds

125 averages the inputs over the past 12.5 seconds

Maximum Percent Limit 0 to 100 Percent

1

/10 second

Fast Keys 1, 4, 4, 6

LOI Key Aux. Function

The maximum percent limit is a tolerance band set up on either side of the
running average. The percentage value refers to deviation from the running
average. For example, if the running average is 100 gal/min, and a 2 percent
maximum limit is selected, then the acceptable range is from 98 to 102
gal/min.

Values within the limit are accepted while values outside the limit are analyzed
to determine if they are a noise spike or an actual flow change.

Time Limit 0 to 256 Seconds

Fast Keys 1, 4, 4, 7

LOI Key Aux. Function

The time limit parameter forces the output and running average
values to the new value of an actual flow rate change that is outside
the percent limit boundaries. It thereby limits response time to flow changes to
the time limit value rather than the length of the running average.

For example, if the number of samples selected is 100, then the response
time of the system is 10 seconds. In some cases this may be unacceptable.
By setting the time limit, you can force the 8712D to clear the value of the
running average and re-establish the output and average at the new flow rate
once the time limit has elapsed. This parameter limits the response time
added to the loop. A suggested time limit value of two seconds is a good
starting point for most applicable process fluids. The selected signal
processing configuration may be turned ON or OFF to suit your needs.

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Rosemount 8712D

REVIEW VARIABLES The 8712D includes a capability that enables you to review the configuration

variable settings.

Review The flowmeter configuration parameters set at the factory should be reviewed

Fast Keys 1, 5

to ensure accuracy and compatibility with your particular application of the
flowmeter.

NOTE

If you are using the LOI to review variables, each variable must be accessed
as if you were going to change its setting. The value displayed on the LOI
screen is the configured value of the variable.

MISCELLANEOUS FUNCTIONS

The miscellaneous functions listed below are used in flowtube calibration and
other procedures. The transmitter gain, flowtube gain, and coil current
functions can be accessed only with the Rosemount 8712D transmitter.

Message The message variable provides an even longer user-defined variable for

Fast Keys 1, 4, 5, 4

LOI Key XMTR INFO

identification and other purposes. It provides 32 characters of information and
is stored with the other configuration data.

Date Date is a user-defined variable that provides a place to save the date of the

Fast Keys 1, 4, 5, 5

LOI Key XMTR INFO

last revision of configuration information.

Flowtube Tag Flowtube tag is the quickest and shortest way of identifying and distinguishing

Fast Keys 1, 4, 5, 8

LOI Key XMTR INFO

between flowtubes. Transmitters can be tagged according to the requirements
of your application. The tag may be up to eight characters long.

Flowtube Serial Number The flowtube serial number is stored in the transmitter configuration for future

Fast Keys 1, 4, 5, 7

LOI Key XMTR INFO

reference. The number provides easy identification if the flowtube needs
servicing or for other purposes.

Transmitter Tag Transmitter Tag is the quickest and shortest way of identifying and

Fast Keys 1, 4, 5, 2

LOI Key XMTR INFO

distinguishing between transmitters. Transmitters can be tagged according to
the requirements of your application. The tag may be up to eight characters
long.

Liner Material Liner Material enables you to select the liner material for the attached

Fast Keys N/A

LOI Key XMTR INFO

flowtube. This variable only needs to be changed if you have replaced your
flowtube.

Liner Materials

•Teflon

• Tefzel

®

(PTFE)

®

(ETFE)

• Polyurethane

• Natural Rubber

• Neoprene

•Ryton

®

•Other

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November 2006

Electrode Type Electrode Type enables you to select the electrode type for your magnetic

Fast Keys N/A

LOI Key XMTR INFO

transmitter system. This variable only needs to be changed if you have
replaced electrodes or if you have replaced your flowtube.

Electrode Types

• Standard

• Std & Ground

• Bullet

•Other

Electrode Material Electrode Material enables you to select the electrode material for your

Fast Keys N/A

LOI Key XMTR INFO

magnetic transmitter system. This variable only needs to be changed if you
have replaced electrodes or if you have replaced your flowtube.

Electrode Materials

• 316L SST

• Hastelloy

®

C-276

•Tantalum

•Plat–10% Ir

• Titanium

•Ryton

• Alloy 20

•Other

Flange Material Flange Material enables you to select the flange material for your magnetic

Fast Keys N/A

LOI Key XMTR INFO

transmitter system. This variable only needs to be changed if you have
changed your flowtube.

• Carbon Steel

• 304 Stainless Steel

• 316 Stainless Steel

Flange Type Flange Type enables you to select the flange type for your magnetic

Fast Keys N/A

LOI Key XMTR INFO

transmitter system. This variable only needs to be changed if you have
changed your flowtube.

• 150# ANSI

• 300# ANSI

• 600# ANSI

• 900# ANSI

• DN 10 - DN 40

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Rosemount 8712D

D/A Trim and (4 20 mA Output Trim)

Fast Keys 1, 2, 4, 1

LOI Key Aux. Function

For maximum accuracy, the analog output should be trimmed for your system
loop.

Use the following steps to complete the Output Trim function.

1. Set the loop to manual, if necessary.

2. Connect a precision ammeter in the 4–20 mA loop.

3. Initiate the Output Trim function with the LOI or Handheld Communicator.

4. Enter the 4 mA meter value when prompted to do so.

5. Enter the 20 mA meter value when prompted to do so.

6. Return the loop to automatic control, if necessary.

The 4–20 mA trim is now completed. You may repeat the 4–20 mA trim to
check the results, or use the analog output test.

Simulate Alarm The Simulate Alarm function forces the transmitter analog output into an

Fast Keys 1, 2, 2, 3

LOI Key Aux. Function

alarm condition according to the settings of the alarm level switch (page 2-5)
and the alarm level setting (Rosemount or NAMUR) (page 3-15).

Scaled D/A Trim Scaled D/A trim enables you to calibrate the flowmeter analog output using a

Fast Keys 1, 2, 4, 2

LOI Key N/A

different scale than the standard 4-20 mA output scale. Non-scaled D/A
trimming (described above), is typically performed using an ammeter where
calibration values are entered in units of milliamperes. Both non-scaled D/A
trimming and scaled D/A trimming allow you to trim the 4-20mA output to
approximately ±5% of the nominal 4mA end point and ±3% of the nominal
20mA end point. Scaled D/A trimming allows you to trim the flowmeter using a
scale that may be more convenient based upon your method of
measurement.

For example, it may be more convenient for you to make current
measurements by direct voltage readings across the loop resistor. If your loop
resistor is 500 ohms, and you want to calibrate the meter using voltage
measurements made across this resistor, you could rescale (select CHANGE
on the 275) your trim points from 4-20mA to 4-20mA x 500 ohm or 2-10 VDC.
Once your scaled trim points have been entered as 2 and 10, you can
calibrate your flowmeter by entering voltage measurements directly from the
voltmeter.

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November 2006

Electronics Trim Electronics trim is the function by which the factory calibrates the transmitter.

Fast Keys 1, 2, 4, 3

LOI Key Aux. Function

This procedure is rarely needed by customers. It is only necessary if you
suspect the Rosemount 8712D is no longer accurate.
A Rosemount 8714 Calibration Standard is required to complete an
electronics trim. Attempting an electronics trim without a Rosemount 8714
Field Calibrator may result in an inaccurate transmitter or an error message.
Electronics trim must be performed only with the coil drive mode
set to 5 Hz and with a nominal flowtube calibration number stored in the
memory.

NOTE

Attempting an electronics trim without a Rosemount 8714 may result in an
inaccurate transmitter, or a “DIGITAL TRIM FAILURE” message may appear.
If this message occurs, no values were changed in the transmitter. Simply
power down the Rosemount 8712D to clear the message.

To simulate a nominal flowtube with the Rosemount 8714, you must change
the following four parameters in the Rosemount 8712D:

1. Tube Calibration Number—1000015010000000

2. Units—ft/s

3. Analog Output Range—20 mA = 30.00 ft/s

4. Analog Output Zero—4 mA = 0 ft/s

5. Coil Pulse Mode—6 Hz

The instructions for changing these parameters are located in the parameter
descriptions in this section.

Set the loop to manual, if necessary, before you begin. Complete the following
steps:

1. Power down the transmitter.

2. Connect the transmitter to a Rosemount 8714 flowtube simulator.

3. Power up the transmitter with the Rosemount 8714 connected and read the flow rate. The electronics need about a 5-minute warm-up time to stabilize.

4. The flow rate reading after warm-up should be between 29.97 and 30.03 ft/s.

5. If the reading is within the range, return the transmitter to the original configuration parameters.

6. If the reading is not within this range, initiate an electronics trim with the LOI or Handheld Communicator. The electronics trim takes about 90 seconds to complete. No transmitter adjustments are required.

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Rosemount 8712D

Auto Zero Trim The auto zero trim function initializes the transmitter for use with the 37 Hz

Fast Keys 1, 2, 4, 4

LOI Key Aux. Function

coil drive mode only. Run this function only with the transmitter and flowtube
installed in the process. The flowtube must be filled with process fluid at zero
flow. Before running the auto zero function, be sure the coil drive mode is set
to 37 Hz. (Auto Zero will not run with the coil drive frequency set at 5 Hz.)

Set the loop to manual if necessary and begin the auto zero procedure. The
transmitter completes the procedure automatically in about 90 seconds. A
symbol appears in the lower right-hand corner of the display to indicate that
the procedure is running.

Universal Auto Trim The universal auto trim function enables the Rosemount 8712D to calibrate

Fast Keys 1, 2, 4, 5

LOI Key Aux. Function

flowtubes that were not calibrated at the Rosemount factory. The function is
activated as one step in a procedure known as in-process calibration. If your
Rosemount flowtube has a 16-digit calibration number, in-process calibration
is not required. If it does not, or if your flowtube is made by another
manufacturer, complete the following steps for in-process calibration.

1. Determine the flow rate of the process fluid in the flowtube.

NOTE

The flow rate in the line can be determined by using another flowtube in the
line, by counting the revolutions of a centrifugal pump, or by performing a
bucket test to determine how fast a given volume is filled by the process fluid.

2. Complete the universal auto trim function.

3. When the routine is completed, the flowtube is ready for use.

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November 2006

MULTIDROP COMMUNICATIONS

Figure 3-3. Typical Multidrop Network

Multidrop configuration refers to the connection of several transmitters to a
single communications transmission line. Communication between the
Handheld Communicator and the transmitters takes place digitally with the
analog output of the transmitters deactivated. Using the HART
communications protocol, up to 15 transmitters can be connected on a single
twisted pair of wires or over phone lines.

The use of a multidrop installation requires consideration of the update rate
necessary from each transmitter, the combination of transmitter models, and
the length of the transmission line. Multidrop installations are not
recommended where intrinsic safety is a requirement. Communication with
the transmitters can be accomplished with commercially available HART (Bell

202) modems and a host implementing the HART protocol. Each transmitter
is identified by a unique address (1-15) and responds to the commands
defined in the HART communication protocol.

Figure 3-3 shows a typical multidrop network. This figure is not an installation
diagram. Contact Rosemount product support with specific requirements for
multidrop applications.

The Handheld Communicator can test, configure, and format a
Rosemount 8712D multidrop installation the same way as it can
a 8712D in a standard point-to-point installation.

HANDHELD COMMUNICATOR

HART

(Bell 202)

Modem

RS-232-C

4–20 mA

Power

Supply

3051-0087A, 8712-8712B01B

Rosemount 8712D Magnetic Flowmeter

Transmitters

NOTE

Please refer to the Handheld Communicator manual for detailed instructions
on the use, features, and full capabilities of the Handheld Communicator.

Explosions can result in death or serious injury.

Do not make connections to the serial port or NiCad recharger jack in an
explosive atmosphere.

Before connecting the Handheld Communicator in an explosive atmosphere, make sure the
instruments in the loop are installed in accordance with intrinsically safe or nonincendive
field wiring practices.

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Figure 3-4. Handheld Communicator Menu Tree for Rosemount 8712D

1. Device Setup

2. PV

3. PV AO

4. PV LRV

5. PV URV

1. Process
Var iables

2. Diagnostics
and Service

1. PV

2. PV % Range

3. PV AO

4. Totalizer Setup

5. Pulse Output

1. Test/Status

2. Loop Test

3. Pulse Output
Loop Test

4. Diagnostics

5. Calibration

6. Internal Flow
Simulator Test

1. Totalizer Units

2. Measured Gross Total

3. Measured Net Total

4. Measured Reverse Total

5. Start Totalizer

6. Stop Totalizer

7. Reset Totalizer

1. Diag Variables

2. Diag Control

3. License State

4. License Key

1. D/A Trim

2. Scaled D/A Trim

3. Digital Trim

4. Auto Zero

5. Universal trim

Rosemount 8712D

1. Status

2. Self Test

1. 4 mA

2. 20 mA

3. Simulate alarm

4. Other

5. End

1. Select Value

2. End

1. EP Value

2. Elec Temp

3. Line Noise

4. 5 Hz SNR

5. 37 Hz SNR

6. Sig Power

7. Internal Flow Sim

3. Basic Setup

4. Detailed
Setup

5. Review

1. Tag

2. Flow Units

3. PV URV

4. PV LRV

5. Line Size

6. Calibration Number

7. PV Damping

1. Characteristics

2. Flow Units

3. Totalizer Units

4. Configure Output

5. Signal Processing

6. Empty Pipe Config

7. Device Info

1. Manufacturer

2. Tag

3. Descriptor

4. Message

5. Date

6. Device ID

7. PV Sensor S/N

8. Flow Tube Tag

9. Write Protect

-Revision No.

-Construction Material

1. Flange Type

2. Flange Material

3. Electrode Type

4. Electrode Material

5. Liner Material

1. PV Units

2. Special Units

1. Line Size

2. Calibration Number

3. Coil Drive Freq

4. Density Value

5. PV USL

6. PV LSL

7. PV Min Span

8. EP Control

1. PV Units

2. Special Units

1. Analog Output

2. Pulse Output

3. Auxiliary Output

4. Reverse Output

5. Totalizer Setup

6. Alarm Level

7. HART Output

1. Low Flow Cutoff

2. PV Damping

3. Coil Drive Freq

4. Status

5. Samples

6. % Rate

7. Time Limit

8. EP Control

1. EP Control

2. EP Value

3. EP Trig. Level

4. EP Counts

1. Empty Pipe

2. Process Noise

3. Grounding/Wiring

4. Electronics Temp

1. Device ID

2. License Key

1. Special Volume Unit

2. Base Volume Unit

3. Conversion Number

4. Base time Unit

5. Special Flow Rate Unit

1. PV URV

2. PV LRV

3. PV AO

4. AO Alarm Type

5. Loop Test

6. D/A Trim

7. Scaled D/A Trim

8. Alarm Level

1. Pulse Scaling

2. Pulse Width

3. Pulse Output Loop Test

1. Totalizer Units

2. Measured Gross Total

3. Measured Net Total

4. Measured Reverse Total

5.Start Totalizer

6. Stop Totalizer

7. Reset Totalizer

1. Polling Address

2. Num Req Preams

3. Burst Mode

4. Burst Options

1. Universal Rev

2. Field Dev Rev

3. Software Rev

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November 2006

Table 3-5. Handheld Fast Keys (275 / 375 Handheld Communicator) and LOI Keys

Function 275 / 375 Fast Keys LOI Key

Process Variables 1, 1

DIAGNOSTICS AND SERVICE

Analog Output Test 1, 2, 2 Aux. function
Pulse Output Test 1, 2, 3 Aux. Function
Self Test 1, 2, 1, 2 Aux. Function
D/A Trim and

4-20 mA Output Trim
Scaled D/A Trim 1, 2, 4, 2
Electronics Trim 1, 2, 4, 3 Aux. Function
Auto Zero Trim 1, 2, 4, 4 Aux. Function
Universal Auto Trim 1, 2, 4, 5 Aux. Function

BASIC SETUP

Ta g 1, 3, 1 XMTR Info
Flow Rate Units 1, 3, 2, 1 Units
URV (Upper Range Value) 1, 3, 3, 2 Analog Output Range
LRV (Lower Range Value) 1, 3, 4, 1 Aux. Function
Line Size 1, 3, 5 Tube Size
Calibration Number 1, 3, 6 Tube Cal No.
Damping 1, 3, 7 Damping

DETAILED SETUP

Pulse Output Scaling 1, 4, 3, 2, 1 Aux. Function
Pulse Width 1, 4, 3, 2, 2 Aux. Function
Special Units 1, 3, 2, 2 Aux. Function
User-Defined Volume Unit 1, 3, 2, 2, 1 Aux. Function
Base Volume Unit 1, 3, 2, 2, 2 Aux. Function
Conversion Number 1, 3, 2, 2, 3 Aux. Function
Base Tim Unit 1, 3, 2, 2, 4 Aux. Function
User-Defined Flow Unit 1, 3, 2, 2, 5 Aux. Function
Auxiliary Output 1, 4, 3, 3 Aux. Function
Totalizer 1, 1, 4 Totalizer
Measure Gross Total 1, 1, 4, 1 To ta l iz er
Start Totalizer 1, 1, 4, 4 Totalizer
Stop Totalizer 1, 1, 4, 5 To t al iz e r
Reset Totalizer 1, 1, 4, 6 Totalizer
Low Flow Cutoff 1, 4, 4, 1 Aux. Function
Coil Dive Frequency 1, 4, 1, 3 Aux. Function
Signal Process Control Status 1, 4, 4, 4 Aux. Function
Empty Pipe 1, 4, 1, 7 Aux. Function
Signal Processing Control 1, 4, 4 Aux. Function
Number of Samples 1, 4, 4, 5 Aux. Function
Maximum Percent Limit 1, 4, 4, 6 Aux. Function
Time Limit 1, 4, 4, 7 Aux. Function

REVIEW VARIABLES

Review 1, 5

MISCELLANEOUS FUNCTIONS

Message 1, 4, 5, 4 XMTR Info
Date 1, 4, 5, 5 XMTR Info
Flowtube Tag 1, 4, 5, 8 XMTR Info
Flowtube Serial Number 1, 4, 5, 7 XMTR Info

1, 2, 4, 1 Aux. Function

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Rosemount 8712D

CONNECTIONS AND HARDWARE

Figure 3-5. Rear Connection Panel with Optional NiCad Recharger Jack

The Handheld Communicator exchanges information with the transmitter from
the control room, the instrument site, or any wiring termination point in the
loop. Be sure to install the instruments in the loop in accordance with
intrinsically safe or nonincendive field wiring practices. Explosions can result if
connections to the serial port or NiCad recharger jack are made in an
explosive situation. The Handheld Communicator should be connected in
parallel with the transmitter. Use the loop connection ports on the rear panel
of the Handheld Communicator (see Figure 3-5). The connections are
non-polarized.

Loop Connection Ports

Optional NiCad

Recharger Jack

275 / 375 Handheld Communicator Ports

Serial Port

275-008AB

Figure 3-6. Connecting the Handheld Communicator to a Transmitter Loop

20

19

10

17 18

9

Fuse

16

876

2

1

5

RL≥250

Current

Meter

Power

Supply

8712-8712U01B

NOTE

The Handheld Communicator needs a minimum of 250 ohms resistance in
the loop to function properly. The Handheld Communicator does not measure
loop current directly.

See page 3-22 for complete warning information.

3-25

Rosemount 8712D

Figure 3-7. Connecting the Handheld Communicator with the Optional Load Resistor

Rosemount

8712U

Fuse

19 20

17 18

16

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November 2006

NOTE
Loop must be broken to insert
the optional 250 ohm resistor.

109

8

765

Optional 250 ohm

load resistor

BASIC FEATURES The basic features of the Handheld Communicator include Action Keys,

Function Keys, and Alphanumeric and Shift Keys.

Figure 3-8. The Handheld Communicator

Action Keys

8712-8712Q11B, 0275B01A

37501AA

Action Keys The Action Keys

As shown in Figure 3-8, the action keys are the six blue, white, and black
keys located above the alphanumeric keys. The function of each key is
described as follows:

ON/OFF Key

Use this key to power the Handheld Communicator. When the
communicator is turned on, it searches for a transmitter on the 4–20 mA
loop. If a device is not found, the communicator displays
the message, “No Device Found at Address O. Poll? YES NO.”

Select “YES” to poll for devices at other address (1-16).

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Rosemount 8712D

Select “NO” to go to the Main Menu.

If a HART-compatible device is found, the communicator displays the
Online Menu with device ID (8712D) and tag (TRANSMITTER).

Directional Keys

Use these keys to move the cursor up, down, left, or right. The right arrow
key also selects menu options, and the left arrow key returns to the
previous menu.

HOT Key

Use this key to quickly access important, user-defined options when
connected to a HART-compatible device. Pressing the Hot Key turns
the Handheld Communicator on and displays the Hot Key Menu.
See Customizing the Hot Key Menu in the Handheld Communicator
manual for more information.

Alphanumeric and Shift Keys

Figure 3-9. Handheld Communicator Alphanumeric and Shift Keys

Function Keys

Use the four software-defined function keys, located below the LCD, to
perform software functions. On any given menu, the label appearing
above a function key indicates the function of that key for the current
menu. As you move among menus, different function key labels appear
over the four keys. For example, in menus providing access to on-line
help, the label may appear above the F1 key. In menus providing
access to the Home Menu, the label may appear above the F3 key.
Simply press the key to activate the function. See your Handheld
Communicator manual for details on specific Function Key definitions.

The Alphanumeric keys perform two functions: the fast selection of menu
options and data entry.

HELP

HOME

275-0383A

Data Entry

Some menus require data entry. Use the Alphanumeric and Shift keys to enter
all alphanumeric information into the Handheld Communicator. If you press an
Alphanumeric key alone from within an edit menu, the bold character in the
center of the key appears. These large characters include the numbers zero
through nine, the decimal point (.), and the dash symbol (—).

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To enter an alphabetic character, first press the Shift key that corresponds to
the position of the letter you want on the alphanumeric key. Then press the
alphanumeric key. For example, to enter the letter R, first press the right Shift
key, then the “6” key (see Figure 3-10). Do not press these keys
simultaneously, but one after the other.

Figure 3-10. Data Entry Key Sequence

November 2006

Fast Key Feature The Fast Key feature provides quick on-line access to transmitter variables

and functions. Instead of stepping your way through the menu structure using
the Action Keys, you can press a Fast Key Sequence to move from the Online
Menu to the desired variable or function. On-screen instructions guide you
through the rest of the screens.

Fast Key Example

The Fast Key sequences are made up of the series of numbers
corresponding to the individual options in each step of the menu structure. For
example, from the Online Menu you can change the Date. Following the
menu structure, press 1 to reach Device Setup, press 4 for Detailed Setup,
press 5 for Device Info, press 5 for Date. The corresponding Fast Key
sequence is 1,4,5,5.

Fast Keys are operational only from the Online Menu. If you use them
consistently, you will need to return to the Online Menu by pressing HOME
(F3) when it is available. If you do not start at the Online Menu, the Fast Keys
will not function properly.

Table 3-5, is a listing of every on-line function with the corresponding Fast
Keys. These codes are applicable only to the transmitter and the Handheld
Communicator.

MENUS AND FUNCTIONS

The Handheld Communicator is a menu driven system. Each screen provides
a menu of options that can be selected as outlined above, or provides
direction for input of data, warnings, messages, or other instructions.

Main Menu The Main Menu provides the following options:

• Offline - The Offline option provides access to offline configuration data

and simulation functions.

• Online - The Online option checks for a device and if it finds one, brings

up the Online Menu.

• Transfer - The Transfer option provides access to options for

transferring data either from the Handheld Communicator (Memory) to
the transmitter (Device) or vice versa. Transfer is used to move off-line
data from the Handheld Communicator to the flowmeter, or to retrieve
data from a flowmeter for off-line revision.

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NOTE

Online communication with the flowmeter automatically loads the current
flowmeter data to the Handheld Communicator. Changes in on-line data are
made active by pressing SEND (F2). The transfer function is used only for
off-line data retrieval and sending.

• Frequency Device - The Frequency Device option displays the

frequency output and corresponding flow output of flow transmitters.

• Utility - The Utility option provides access to the contrast control for the

Handheld Communicator LCD screen and to the autopoll setting used
in multidrop applications.

Once selecting a Main Menu option, the Handheld Communicator provides
the information you need to complete the operation. If further details are
required, consult the Handheld Communicator manual.

Rosemount 8712D

Online Menu The Online Menu can be selected from the Main Menu as outlined above, or it

may appear automatically if the Handheld Communicator is connected to an
active loop and can detect an operating flowmeter.

NOTE

The Main Menu can be accessed from the Online Menu. Press the left arrow
action key to deactivate the on-line communication with the flowmeter and to
activate the Main Menu options.

When configuration variables are reset in the on-line mode, the new settings
are not activated until the data are sent to the flowmeter.
Press SEND (F2) to update the process variables of the flowmeter.

On-line mode is used for direct evaluation of a particular meter,
re-configuration, changing parameters, maintenance, and other functions.

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Diagnostic Messages The following is a list of messages used by the Handheld Communicator (HC)

and their corresponding descriptions.

Variable parameters within the text of a message are indicated with <variable
parameter>.

Reference to the name of another message is identified by
[another message].

Table 3-6. Handheld Communicator Diagnostic Messages

Message Description

Add item for ALL device types or only for this ONE device type Asks the user whether the hot key item being added should be added

Command Not Implemented The connected device does not support this function.
Communication Error Either a device sends back a response indicating that the message it

Configuration memory not compatible with connected device The configuration stored in memory is incompatible with the device to

Device Busy The connected device is busy performing another task.
Device Disconnected Device fails to respond to a command
Device write protected Device is in write-protect mode Data can not be written
Device write protected – do you still want to shut off? Device is in write-protect mode – press YES to turn the HC off and lose

Display value of variable on hot key menu? Asks whether the value of the variable should be displayed adjacent to

Download data from configuration memory to device Prompts user to press SEND softkey to initiate a memory to device

Exceed field width Indicates that the field width for the current arithmetic variable exceeds

Exceed precision Indicates that the precision for the current arithmetic variable exceeds

Ignore next 50 occurrences of status? Asked after displaying device status – softkey answer determines

Illegal character An invalid character for the variable type was entered.
Illegal date The day portion of the date is invalid.
Illegal month The month portion of the date is invalid.
Illegal year The year portion of the date is invalid.
Incomplete exponent The exponent of a scientific notation floating point variable is

Incomplete field The value entered is not complete for the variable type.
Looking for a device Polling for multidropped devices at addresses 1–15
Mark as read only variable on hot key menu? Asks whether the user should be allowed to edit the variable from the

No device configuration in configuration memory There is no configuration saved in memory available to re-configure

No Device Found Poll of address zero fails to find a device, or poll of all addresses fails to

No hot key menu available for this device There is no menu named “hot key” defined in the device description for

No off-line devices available There are no device descriptions available to be used to configure a

No simulation devices available There are no device descriptions available to simulate a device.
No UPLOAD_VARIABLES in ddl for this device There is no menu named “upload_variables” defined in the device

for all device types or only for the type of device that is connected.

received was unintelligible or the HC cannot understand the response
from the device.

which a transfer has been requested.

the unsent data.

its label on the hot key menu if the item being added to the hot key menu
is a variable.

transfer.

the device- specified description edit format

the device- specified description edit form

whether next 50 occurrences of device status will be ignored or
displayed

incomplete.

hot key menu if the item being added to the hot key menu is a variable

off-line or transfer to a device.

find a device if auto-poll is enabled

this device.

device off-line.

description for this device – this menu is required for off-line
configuration.

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Table 3-6. Handheld Communicator Diagnostic Messages

Message Description

No Valid Items The selected menu or edit display contains no valid items.
OFF KEY DISABLED Appears when the user attempts to turn the HC off before sending

On-line device disconnected with unsent data – RETRY or OK to
lose data

Out of memory for hot key configuration – delete unnecessary
items

Overwrite existing configuration memory Requests permission to overwrite existing configuration either by a

Press OK... Press the OK softkey – this message usually appears after an error

Restore device value? The edited value that was sent to a device was not properly

Save data from device to configuration memory Prompts user to press SAVE softkey to initiate a device-to-memory

Saving data to configuration memory Data is being transferred from a device to configuration memory.
Sending data to device Data is being transferred from configuration memory to a device.
There are write only variables which have not been edited.

Please edit them.

There is unsent data. Send it before shutting off? Press YES to send unsent data and turn the HC off. Press NO to turn

Too few data bytes received Command returns fewer data bytes than expected as determined by the

Transmitter Fault Device returns a command response indicating a fault with the

Units for <variable label> has changed – unit must be sent before
editing, or invalid data will be sent

Unsent data to on-line device – SEND or LOSE data There is unsent data for a previously connected device which must be

Use up/down arrows to change contrast. Press DONE when done. Gives direction to change the contrast of the HC display
Value out of range The user-entered value is either not within the range for the given type

<message> occurred reading/writing <variable label> Either a read/write command indicates too few data bytes received,

<variable label> has an unknown value – unit must be sent before
editing, or invalid data will be sent

modified data or before completing a method
There is unsent data for a previously connected device. Press RETRY

to send data, or press OK to disconnect and lose unsent data.
There is no more memory available to store additional hot key items.

Unnecessary items should be deleted to make space available.

device-to-memory transfer or by an off-line configuration; user answers
using the softkeys

message from the application or as a result of hart communications.

implemented. Restoring the device value returns the variable to its
original value.

transfer

There are write-only variables which have not been set by the user.
These variables should be set or invalid values may be sent to the
device.

the HC off and lose the unsent data.

device description

connected device
The engineering units for this variable have been edited. Send

engineering units to the device before editing this variable.

sent or thrown away before connecting to another device.

and size of variable or not within the min/max specified by the device.

transmitter fault, invalid response code, invalid response command,
invalid reply data field, or failed pre- or post-read method; or a response
code of any class other than SUCCESS is returned reading a particular
variable.

A variable related to this variable has been edited. Send related variable
to the device before editing this variable.

Rosemount 8712D

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Rosemount 8712D

Section 4 Flowtube Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1

Flowtube Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-3

Flowtube Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-4

Installation (Flanged Flowtube) . . . . . . . . . . . . . . . . . . . . . page 4-7

Installation (Wafer Flowtube) . . . . . . . . . . . . . . . . . . . . . . . page 4-10

Installation (Sanitary Flowtube) . . . . . . . . . . . . . . . . . . . . . page 4-12

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-12

Process Leak Protection (Optional) . . . . . . . . . . . . . . . . . page 4-16

This section covers the steps required to physically install the magnetic
flowtube. For electrical connections and cabling Section 2: Installation.
Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Please refer to
the following safety messages before performing any operation in this section.

SAFETY MESSAGES This symbol is used throughout this manual to indicate that special attention

to warning information is required.

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 hazardous area approval.

Do not connect a Rosemount 8712D to a non-Rosemount flowtube that is located in an
explosive atmosphere.

www.rosemount.com

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

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.

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.

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Rosemount 8712D

FLOWTUBE HANDLING Handle all parts carefully to prevent damage. Whenever possible, transport

the system to the installation site in the original shipping containers.

®

Te fl o n
mechanical damage and normal unrestrained distortion. Remove the end
covers just before installation.

Flanged 6- through 36-inch flowtubes come with a lifting lug on each flange.
The lifting lugs make the flowtube easier to handle when it is transported and
lowered into place at the installation site.

Flanged ½- to 4-inch flowtubes do not have lugs. They must be supported
with a lifting sling on each side of the housing.

Figure 4-1 shows flowtubes correctly supported for handling and installation.
Notice the plywood end pieces are still in place to protect the flowtube liner
during transportation.

Figure 4-1. Rosemount 8705 Flowtube Support for Handling

-lined flowtubes are shipped with end covers that protect it from both

½- through 4-Inch

Flowtubes

See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.

8732-0281B02AB, C02AB

6-Inch and Larger

Flowtubes

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FLOWTUBE MOUNTING Physical mounting of a flowtube is similar to installing a typical section of pipe.

Conventional tools, equipment, and accessories (bolts, gaskets, and
grounding hardware) are required.

Upstream/Downstream Piping

To ensure specification accuracy over widely varying process conditions,
install the flowtube a minimum of five straight pipe diameters upstream and
two pipe diameters downstream from the electrode plane (see Figure 4-2).

Figure 4-2. Upstream and Downstream Straight Pipe Diameters

5 Pipe Diameters

FLOW

2 Pipe Diameters

Flowtube Orientation The flowtube should be installed in a position that ensures the flowtube

remains full during operation. Figures 4-3, 4-4, and 4-5 show the proper
flowtube orientation for the most common installations. The following
orientations ensure that the electrodes are in the optimum plane to minimize
the effects of entrapped gas.

Vertical installation allows upward process fluid flow and is generally
preferred. Upward flow keeps the cross-sectional area full, regardless
of flow rate. Orientation of the electrode plane is unimportant in vertical
installations. As illustrated in Figures 4-3 and 4-4, avoid downward flows
where back pressure does not ensure that the flowtube remains full at all
times.

8732-0281G02A

Figure 4-3. Vertical Flowtube Orientation

4-4

A

FLOW

B

FLOW

8735-0005A01AB, 0005A01BB

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November 2006

Figure 4-4. Incline or Decline Orientation

Rosemount 8712D

A

B

FLOW

Figure 4-5. Horizontal Flowtube Orientation

FLOW

Horizontal installation should be restricted to low piping sections that are
normally full. Orient the electrode plane to within 45 degrees of horizontal in
horizontal installations. A deviation of more than 45 degrees of horizontal
would place an electrode at or near the top of the flowtube thereby making it
more susceptible to insulation by air or entrapped gas at the top of the
flowtube.

FLOW

The electrodes in the Rosemount 8711 are properly oriented when the top
of the flowtube is either vertical or horizontal, as shown in Figure 4-6. Avoid
any mounting orientation that positions the top of the flowtube
at 45° from the vertical or horizontal position.

8732-0005A01EB, 0005A01FB

8732-0005A01C

4-5

Rosemount 8712D

Figure 4-6. Rosemount 8711 Mounting Position

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00809-0100-4661, Rev AB

November 2006

45° Electrode Plane

45° Electrode Plane

Flow Direction The flowtube should be mounted so that the FORWARD end of the flow

arrow, shown on the flowtube identification tag, points in the direction of flow
through the tube (see Figure 4-7).

Figure 4-7. Flow Direction

FLOW

8711-8711-E01AB, 8711-8711-F01A

8712-0281H02FD

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Rosemount 8712D

INSTALLATION (FLANGED FLOWTUBE)

The following section should be used as a guide in the installation of the
flange-type Rosemount 8705 and Rosemount 8707 High-Signal Flowtubes.
Refer to page 4-10 for installation of the wafer-type Rosemount 8711
Flowtube.

Gaskets The flowtube 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. If the gaskets will be removed frequently, protect the liner ends. All other
applications (including flowtubes with lining protectors or a grounding
electrode) require only one gasket on each end connection, as shown in
Figure 4-8. If grounding rings are used, gaskets are required on each side of
the grounding ring, as shown in Figure 4-9.

Figure 4-8. Gasket Placement

Gasket (Supplied by user)

Figure 4-9. Gasket Placement with Non-attached Grounding Rings

Gasket (Supplied by user)

Grounding Ring

Gasket (Supplied by user)

Flange Bolts Suggested torque values by flowtube line size and liner type are listed in

Table 4-1 on page 4-8 for ASME B16.5 (ANSI) flanges and Table 4-2 and
Table 4-3 for DIN flanges. Consult the factory for other flange ratings. Tighten
flange bolts in the incremental sequence as shown in Figure 4-10. See
Table 4-1 and Table 4-2 for bolt sizes and hole diameters.

8705-0040E

8705-0038D

See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.

4-7

Rosemount 8712D

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November 2006

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 left and then snug and tighten right. Failure to do so
will result in liner damage.

Always check for leaks at the flanges after tightening the flange bolts. Failure
to use the correct flange bolt tightening methods can result in severe damage.
All flowtubes require a second torquing twenty-four hours after initial flange
bolt tightening.

Table 4-1. Flange Bolt Torque Specifications for Rosemount 8705 and 8707 High-Signal Flowtubes

Teflon/Tefzel liner Polyurethane liner

Class 150

Size Code Line Size

005
010 1 inch (25 mm) 8 12 — —
015 1
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) 11 0 175 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

1

/2-inch (15 mm) 8 8 — —

1

/2 inch (40 mm) 13 25 7 18

(pound-feet)

Class 300

(pound-feet)

Class 150

(pound-feet)

Class 300

(pound-feet)

See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.

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Table 4-2. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705

Teflon/Tefzel liner

Size

Code

005
010 1 inch (25 mm) 13 6983 13 6983 13 6983 13 8816
015 1
020 2 inch (50 mm) 25 10420 25 10420 25 10420 25 14457
030 3 inch (80 mm) 14 5935 14 5935 18 7612 18 12264
040 4 inch (100 mm) 17 7038 17 7038 30 9944 30 16021
060 6 inch (150mm) 23 7522 32 10587 60 16571 60 26698
080 8 inch (200 mm) 35 11516 35 11694 66 18304 66 36263
100 10 inch (250 mm) 31 10406 59 16506 105 25835 105 48041
120 12 inch (300 mm) 43 14439 82 22903 109 26886 109 51614
140 14 inch (350 mm) 42 13927 80 22091 156 34578 156 73825
160 16 inch (400 mm) 65 18189 117 28851 224 45158 224 99501
180 18 inch (450 mm) 56 15431 99 24477 — — — 67953
200 20 inch (500 mm) 66 18342 131 29094 225 45538 225 73367
240 24 inch (600 mm) 104 25754 202 40850 345 63940 345 103014

Line Size (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)

1

/2-inch (15 mm) 7 3209 7 3809 7 3809 7 4173

1

/2 inch (40 mm) 24 9983 24 9983 24 9983 24 13010

PN10 PN 16 PN 25 PN 40

Rosemount 8712D

Figure 4-10. Flange Bolt Torquing Sequence

4-Bolt

8-Bolt

20-Bolt

Torque the flange bolts

in increments according to

the above numerical sequence.

12-Bolt

14-Bolt

8701-0870G02A

4-9

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00809-0100-4661, Rev AB

Rosemount 8712D

Table 4-3. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705

Polyurethane Liner

Size

Code

005
010 1 inch (25 mm) 2 1191 3 1890 5 2958 10 5555
015 1
020 2 inch (50 mm) 6 2535 10 4021 15 6294 26 10831
030 3 inch (80 mm) 5 2246 9 3563 13 5577 24 19998
040 4 inch (100 mm) 7 3033 12 4812 23 7531 35 11665
060 6 inch (150mm) 16 5311 25 8425 47 13186 75 20829
080 8 inch (200 mm) 27 8971 28 9487 53 14849 100 24687
100 10 inch (250 mm) 26 8637 49 13700 87 21443 155 34547
120 12 inch (300 mm) 36 12117 69 19220 91 22563 165 36660
140 14 inch (350 mm) 35 11693 67 18547 131 29030 235 47466
160 16 inch (400 mm) 55 15393 99 24417 189 38218 335 62026
200 20 inch (500 mm) 58 15989 114 25361 197 39696 375 64091
240 24 inch (600 mm) 92 22699 178 36006 304 56357 615 91094

Line Size

1

/2-inch (15 mm) 1 521 1 826 2 1293 6 3333

1

/2 inch (40 mm) 5 1960 7 3109 12 4867 20 8332

(Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)

PN 10 PN 16 PN 25 PN 40

November 2006

INSTALLATION (WAFER FLOWTUBE)

The following section should be used as a guide in the installation of the
Rosemount 8711 Flowtube. Refer to page 4-7 for installation of the
flange-type Rosemount 8705 and 8707 High-Signal flowtube.

Gaskets The flowtube 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. If the gaskets will be removed frequently, protect the
liner ends. If grounding rings are used, a gasket is required on each side of
the grounding ring.

Alignment and Bolting

1. On 11/2 - through 8-inch (40 through 200 mm) line sizes, place
centering rings over each end of the flowtube. The smaller line sizes,

0.15- through 1-inch (4 through 25 mm), do not require centering
rings.

2. Insert studs for the bottom side of the flowtube between the pipe
flanges. Stud specifications are listed in Table 4-4. Using carbon

steel bolts on smaller line sizes, 0.15- through 1-inch
(4 through 25 mm), rather than the required stainless steel bolts,
will degrade performance.

4-10

Reference Manual

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November 2006

Rosemount 8712D

Table 4-4. Stud Specifications

Nominal Flowtube Size Stud Specifications

0.15 – 1 inch (4 – 25 mm) 316 SST ASTM A193, Grade B8M

Class 1 threaded mounted studs

11/2 – 8 inch (40 – 200 mm) CS, ASTM A193, Grade B7, threaded mounting studs

3. Place the flowtube between the flanges. Make sure that the centering rings are properly placed in the studs. The studs should be aligned with the markings on the rings that correspond to the flange you are using.

4. Insert the remaining studs, washers, and nuts.

5. Tighten to the torque specifications shown in Table 4-5. Do not overtighten the bolts or the liner may be damaged.

NOTE

On the 4- and 6-inch PN 10–16, insert the flowtube with rings first and then
insert the studs. The slots on this ring scenario are located on the inside of the
ring.

Figure 4-11. Gasket Placement with Centering Rings

Centering Rings

Installation, Studs
Nuts and Washers

Customer-supplied

Gasket

FLOW

Flange Bolts Flowtube sizes and torque values for both Class 150 and Class 300 flanges

are listed in Table 4-5. Tighten flange bolts in the incremental sequence,
shown in Figure 4-10.

Always check for leaks at the flanges after tightening the flange
bolts. All flowtubes require a second torquing 24 hours after initial flange bolt
tightening.

8732-0002A1A

4-11

Reference Manual

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Rosemount 8712D

November 2006

Table 4-5. Flange bolt Torque Specifications of Rosemount 8711 Flowtubes

Size Code Line Size Pound-feet Newton-meter

15F 0.15 inch (4 mm) 5 6.8
30F 0.30 inch (8 mm) 5 6.8
005
010 1 inch (25 mm) 10 13.6
015 1
020 2 inch (50 mm) 25 34.1
030 3 inch (80 mm) 40 54.6
040 4 inch (100 mm) 30 40.1
060 6 inch (150 mm) 50 68.2
080 8 inch (200 mm) 70 81.9

1

/2-inch (15 mm) 5 6.8

1

/2 inch (40 mm) 15 20.5

INSTALLATION (SANITARY FLOWTUBE)

Gaskets The flowtube 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. Gaskets are supplied with all Rosemount 8721
Sanitary flowtubes except when the process connection is an IDF sanitary
screw type.

Alignment and Bolting Standard plant practices should be followed when installing a magmeter with

sanitary fittings. Unique torque values and bolting techniques are not
required.

Figure 4-12. Rosemount 8721 Sanitary Installation

User supplied clamp

User supplied gasket

If ordered manufacturer

supplied clamp and gasket.

8721_A_06.EPS

GROUNDING Process grounding the flowtube is one the most important details of flowtube

installation. Proper process grounding ensures that the transmitter amplifier is
referenced to the process. This creates the lowest noise environment for the
transmitter to make a stable reading. Use Table 4-6 to determine which
grounding option to follow for proper installation.

4-12

Reference Manual

00809-0100-4661, Rev AB
November 2006

NOTE

Consult factory for installations requiring cathodic protection or situations
where there are high currents or high potential in the process.

The flowtube case should always be earth grounded in accordance with
national and local electrical codes. Failure to do so may impair the protection
provided by the equipment. The most effective grounding method is direct
connection from the flowtube to earth ground with minimal impedance.

The Internal Ground Connection (Protective Ground Connection) located in
side the junction box is the Internal Ground Connection screw. This screw is
identified by the ground symbol:

Table 4-6. Grounding Installation

Grounding Options

Type of Pipe No Grounding Options Grounding Rings Grounding Electrodes Lining Protectors

Conductive Unlined Pipe See Figure 4-13 Not Required Not Required See Figure 4-14

Conductive Lined Pipe Insufficient Grounding See Figure 4-14 See Figure 4-13 See Figure 4-14

Non-Conductive Pipe Insufficient Grounding See Figure 4-15 See Figure 4-16 See Figure 4-15

Rosemount 8712D

Figure 4-13. No Grounding Options or Grounding Electrode in Lined Pipe

Earth

Ground

8705-0040C

4-13

Rosemount 8712D

Figure 4-14. Grounding with Grounding Rings or Lining Protectors

Reference Manual

00809-0100-4661, Rev AB

November 2006

Earth

Ground

Figure 4-15. Grounding with Grounding Rings or Lining Protectors

Grounding Rings or

Lining Protectors

Earth

Ground

Grounding Rings

8705-038C

8711-0360A01B

4-14

Reference Manual

00809-0100-4661, Rev AB
November 2006

Figure 4-16. Grounding with Grounding Electrodes

Rosemount 8712D

Earth

Ground

8711-0360A01A

4-15

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

PROCESS LEAK PROTECTION (OPTIONAL)

Standard Housing Configuration

The Rosemount 8705 Flowtube housing is fabricated from carbon steel to
perform two separate functions. First, it provides shielding for the flowtube
magnetics so that external disturbances cannot interfere with the magnetic
field and thus affect the flow measurement. Second, it provides the physical
protection to the coils and other internal components from contamination and
physical damage that might occur in an industrial environment. The housing is
completely welded and gasket-free.

The three housing configurations are identified by the W0, W1, or W3 in the
model number option code when ordering. Below are brief descriptions of
each housing configuration, which are followed by a more detailed overview.

• Code W0 — sealed, welded coil housing (standard configuration)

• Code W1 — sealed, welded coil housing with a relief valve capable of

venting fugitive emissions to a safe location (additional plumbing from
the flowtube to a safe area, installed by the user, is required to vent
properly)

• Code W3 — sealed, welded coil housing with separate electrode

compartments capable of venting fugitive emissions (additional
plumbing from the flowtube to a safe area, installed by the user, is
required to vent properly)

The standard housing configuration is identified by a code W0 in the model
number. This configuration does not provide separate electrode
compartments with external electrode access. In the event of a process leak,
these models will not protect the coils or other sensitive areas around the
flowtube from exposure to the pressure fluid (Figure 4-17).

Figure 4-17. Standard Housing
— Configuration Sealed Welded
Housing (Option Code W0)

(no relief valve)

¾–14 NPT Conduit
Connection

8705-1002A05D

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November 2006

Rosemount 8712D

Relief Valves The first optional configuration, identified by the W1 in the model number

option code, uses a completely welded coil housing. This configuration does
not provide separate electrode compartments with external electrode access.
This optional housing configuration provides a relief valve in the housing to
prevent possible overpressuring caused by damage to the lining or other
situations that might allow process pressure to enter the housing. The relief
valve will vent when the pressure inside the flowtube housing exceeds 5 psi.
Additional piping (provided by the user) may be connected to this relief valve
to drain any process leakage to safe containment (see Figure 4-18).

Figure 4-18. Coil-Housing
Configuration — Standard
Welded Housing With Relief
Valve (Option Code W1)

Optional:

Use drain port to

plumb to a safe area

(Supplied by user)

¼'' NPT – 5 psi

Pressure Relief Valve

¾–14 NPT Conduit
Connection

Process Leak Containment

8705-0021A05B

The second optional configuration, identified as option code W3 in the model
number, divides the coil housing into three compartments: one for each
electrode and one for the coils. Should a damaged liner or electrode fault
allow process fluid to migrate behind the electrode seals, the fluid is contained
in the electrode compartment. The sealed electrode compartment prevents
the process fluid from entering the coil compartment where it would damage
the coils and other internal components.

The electrode compartments are designed to contain the process fluid at full
line pressure. An o-ring sealed cover provides access to each of the electrode
compartments from outside the flowtube; drainports are provided in each
cover for the removal of fluid.

NOTE

The electrode compartment could contain full line pressure and it must be
depressurized before the cover is removed.

4-17

Rosemount 8712D

Figure 4-19. Housing
Configuration — Sealed
Electrode Compartment (Option
Code W3)

Fused Glass Seal

Reference Manual

00809-0100-4661, Rev AB

November 2006

O-Ring Seal

Sealed Electrode Compartment

1

/2 - 27 NPT

Optional:

Use drain port to

plumb to a safe area

Grounding Electrode Port

(Supplied by user)

If necessary, capture any process fluid leakage, connect the appropriate
piping to the drainports, and provide for proper disposal
(see Figure 4-19).

8705-0007ADGB

4-18

Reference Manual

00809-0100-4661, Rev AB
November 2006

Section 5 Maintenance and

Troubleshooting

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-1

Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-2

Transmitter Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . page 5-4

Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-6

Quick Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-7

This section covers basic transmitter and flowtube troubleshooting. Problems
in the magnetic flowmeter system are usually indicated by incorrect output
readings from the system, error messages, or failed tests. Consider all
sources when identifying a problem in your system. If the problem persists,
consult your local Rosemount representative to determine if the material
should be returned to the factory.

Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Please read the
following safety messages before performing any operation described in this
section. Refer to these warnings when appropriate throughout this section.

Rosemount 8712D

SAFETY INFORMATION

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.

Mishandling products exposed to a hazardous substance may result in death or serious
injury. If the product being returned was exposed to a hazardous substance as defined by
OSHA, a copy of the required Material Safety Data Sheet (MSDA) for each hazardous
substance identified must be included with the returned goods.

The Magnetic Flowmeter Transmitter performs self diagnostics on the entire
magnetic flowmeter system: the transmitter, the flowtube, and the
interconnecting wiring. By sequentially troubleshooting each individual piece
of the magmeter system, it becomes easier to pin point the problem and make
the appropriate adjustments.

If there are problems with a new magmeter installation, see “Installation
Check and Guide” on page 3-2 for a quick guide to solve the most common
installation problems. For existing magmeter installations, Table 5-3 lists the
most common magmeter problems and corrective actions.

www.rosemount.com

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

DIAGNOSTIC MESSAGES

Problems in the magnetic flowmeter system are usually indicated by incorrect
output readings from the system, error messages, or failed tests. Consider all
sources in identifying a problem in your system.

Table 5-1. Rosemount 8712D Diagnostic Messages

Symptom Potential Cause Corrective Action

“Empty Pipe” Empty Pipe None - message will clear when pipe is full

Wiring Error Check that wiring matches appropriate wiring diagrams - see Appendix D:

Electrode Error Perform flowtube tests C and D (see Table 5-4 on page 5-8)
Conductivity less than 5 microhms

per cm

“Coil Open Circuit” Improper wiring Check coil drive wiring and flowtube coils

Other manufacturer’s flowtube Change coil current to 75 mA
Circuit Board Failure Replace Rosemount 8712D Electronics
Verify the transmitter is not a

Rosemount 8712H
Coil Circuit OPEN Fuse Return to factory for fuse replacement

“Auto Zero Failure” Flow is not set to zero Force flow to zero, perform autozero

Unshielded cable in use Change wire to shielded cable
Moisture problems See moisture problems in “Accuracy Section”

“Auto-Trim Failure” No flow in pipe while performing

Universal Auto Trim
Wiring error Check that wiring matches appropriate wiring diagrams - see Appendix D:

Flow rate is changing in pipe while
performing Universal Auto-Trim
routine

Flow rate through flowtube is
significantly different than value
entered during Universal Auto-Trim
routine

Incorrect calibration number
entered into transmitter for
Universal Auto-Trim routine

Wrong tube size selected Correct tube size setting - See “Line Size” on page 3-8
Flowtube failure Perform flowtube tests C and D (see Table 5-4 on page 5-8)

“Electronics Failure” Electronics self check failure Replace Electronics

“Reverse Flow” Electrode or coil wires reverse Verify wiring between flowtube and transmitter

Flow is reverse Turn ON Reverse Flow Enable to read flow
Flowtube installed backwards Re-install flowtube correctly, or switch either the electrode wires (18 and 19)

“PZR Activated”

(Positive Zero Return)

“Pulse Out of Range” The transmitter is trying to

“Analog Out of Range” Flow rate is greater than analog

“Flowrate > 43 ft/sec” Flow rate is greater than 43 ft/sec Lower flow velocity, increase pipe diameter

External voltage applied to
terminals 9 and 10

generate a frequency greater than
11,000 Hz

output Range

Improper wiring Check coil drive wiring and flowtube coils

Wiring Diagrams

Increase Conductivity to less or equal than 5 microhms per cm

Perform flowtube test A - Flowtube Coil

Replace Rosemount 8712H with Rosemount 8712C/U/H/D

Establish a known flow in tube, and perform Universal Auto-Trim calibration

Wiring Diagrams
Establish a constant flow in tube, and perform Universal Auto-Trim

calibration

Verify flow in tube and perform Universal Auto-Trim calibration

Replace flowtube calibration number with 1000005010000001

or the coil wires (1 and 2)
Remove voltage to turn PZR off

Increase pulse scaling to prevent pulse output going above 11,000 Hz

Reduce flow, increase Analog Output Range

Perform flowtube test A - Flowtube Coil (see Table 5-4 on page 5-8)

5-2

Reference Manual

00809-0100-4661, Rev AB
November 2006

Table 5-1. Rosemount 8712D Diagnostic Messages

Symptom Potential Cause Corrective Action

“Digital Trim Failure”

(Cycle power to clear

messages, no changes

were made)

The calibrator (8714B/C/D) is not
connected properly

Incorrect calibration number
entered into transmitter

Calibrator is not set to 30 FPS Change calibrator setting to 30 FPS
Bad calibrator Replace calibrator

Review calibrator connections

Replace flowtube calibration number with 1000005010000001

Table 5-2. Basic Troubleshooting–Rosemount 8712D

Symptom Potential Cause Corrective Action

Output at 0 mA No power to transmitter Check power source and connections to the transmitter

Blown fuse Check the fuse and replace with an appropriately rated fuse, if necessary
Electronics failure Verify transmitter operation with an 8714 Field Calibrator or replace the

electronic board

Analog output improperly
configured

Output at 4 mA Open coil drive circuit Check coil drive circuit connections at the flowtube and at the transmitter

Transmitter in multidrop mode Configure Poll Address to 0 to take transmitter out of multidrop mode
Low Flow Cutoff set too high Configure Low Flow Cutoff to a lower setting or increase flow to a value

PZR Activated Open PZR switch at terminals 9 and 10 to deactivate the PZR
Flow is in reverse direction Enable Reverse Flow function
Shorted coil Coil check – perform flowtube test
Empty pipe Fill pipe
Electronics failure Verify transmitter operation with an 8714 Field Calibrator or replace the

Output at 21.6 mA Transmitter not ranged properly Reset the transmitter range values –

Output at alarm level Electronics failure Cycle power by removing and installing the power fuse. If alarm is still

Pulse output at zero,
regardless of flow

Communication problems
with the Handheld
Communicator

Error Messages on LOI or
Handheld Communicator

Wiring error Check pulse output wiring at terminals 5 and 6. Refer to wiring diagram for

PZR activated Remove signal at terminals 9 and 10 to deactivate the PZR.
No power to transmitter Check pulse output wiring at terminals 5 and 6. Refer to wiring diagram for

Reverse flow Enable Reverse Flow function
Electronics failure Verify transmitter operation with an 8714 Field Calibrator or replace the

4–20 mA output configuration Check analog power switch (internal/external). The Handheld Communicator

Communication interface wiring
problems

Low batteries in the Handheld
Communicator

Old revision of software in the
Handheld Communicator

Many possible causes depending
upon the message

Check the analog power switch

above the low flow cutoff

electronic board

see “LRV (Lower Range Value)” on page 3-8;
Check tube size setting in transmitter and make sure it matches your actual
tube size – see “Line Size” on page 3-8

present, verify transmitter operation with an 8714 Field Calibrator or replace
the electronic board

your flowtube and pulse output

your flowtube and pulse output

electronic board

requires a 4–20 mA output to function
Incorrect load resistance (250  minimum);

Check appropriate wiring diagram
Replace the batteries in the Handheld Communicator – see the

communicator manual for instructions
Consult your local sales office about updating to the latest revision

of software
See the Table 3-2 for the LOI or Handheld Communicator messages.

Rosemount 8712D

5-3

Rosemount 8712D

TRANSMITTER TROUBLESHOOTING

Table 5-3. Advanced Troubleshooting–Rosemount 8712D

Symptom Potential Cause Corrective Action

Does not appear to be within
rated accuracy

Noisy Process Chemical additives upstream of

Transmitter, control system, or other
receiving device not configured
properly

Electrode Coating Use bulletnose electrodes;

Air in line Move the flowtube to another location in the process line to

Moisture problem Perform the flowtube Tests A, B, C, and D

Improper wiring If electrode shield and signal wires are switched, flow indication

Flow rate is below 1 ft/s
(specification issue)

Auto zero was not performed when the
coil drive frequency was changed from
5 Hz to 37 Hz

Flowtube failure–Shorted electrode Perform the flowtube Tests C and D

Flowtube failure–Shorted or open coil Perform the flowtube Tests A and B

Transmitter failure Verify transmitter operation with an 8714 Field Calibrator or

magnetic flowmeter

Sludge flows–Mining/Coal/
Sand/Slurries (other slurries with
hard particles)

Styrofoam or other insulating particles
in process

Electrode coating Use replaceable electrodes in Rosemount 8705.

Air in line Move the flowtube to another location in the process line to

Low conductivity fluids (below 10
micromhos/cm)

Advanced Troubleshooting continued on next page

Reference Manual

00809-0100-4661, Rev AB

November 2006

Check all configuration variables for the transmitter, flowtube,
communicator, and/or control system

Check these other transmitter settings:

•Flowtube calibration number

•Units

•Line size

Perform a loop test to check the integrity of the circuit – see
“Analog Output Test” on page 5-6

Downsize flowtube to increase flow rate above 3 ft/s;
Periodically clean flowtube

ensure that it is full under all conditions.

(see Table 5-4 on page 5-8)

will be about half of what is expected. Check wiring diagrams for
your application.

See accuracy specification for specific transmitter and flowtube

Perform the auto zero function

(see Table 5-4 on page 5-8)

(see Table 5-4 on page 5-8)

replace the electronic board
Complete the Noisy Process Basic procedure. Move injection

point downstream of magnetic flowmeter, or move magnetic
flowmeter.

Decrease flow rate below 10 ft/s

Complete the Noisy Process Basic procedure;
Consult factory

Use a smaller flowtube to increase flow rate above 3 ft/s.
Periodically clean flowtube.

ensure that it is full under all conditions.

• Trim electrode and coil wires – see “Conduit Cables” on
page 2-14

• Keep flow rate below 3 FPS

• Integral mount transmitter

• Use 8712-0752-1,3 cable

• Use N0 approval flowtube

5-4

Reference Manual

00809-0100-4661, Rev AB
November 2006

Table 5-3. Advanced Troubleshooting–Rosemount 8712D

Symptom Potential Cause Corrective Action

Meter output is unstable Medium to low conductivity fluids (10–

25 micromhos/cm) combined with
cable vibration or 60 Hz interference

Electrode incompatibility Check the Technical Data Sheet, Magnetic Flowmeter Material

Improper grounding Check ground wiring – see “Mount the Transmitter” on page 2-3

High local magnetic or electric fields Move magnetic flowmeter (20–25 ft away is usually acceptable)
Control loop improperly tuned Check control loop tuning
Sticky valve (look for periodic

oscillation of meter output)
Flowtube failure Perform the flowtube Tests A, B, C, and D

Analog output loop problem Check that the 4 to 20 mA loop matches the digital value.

Reading does not appear to be
within rated accuracy

Transmitter, control system, or other
receiving device not configured
properly

Electrode coating Use bulletnose electrodes in the Rosemount 8705 Flowtube.

Air in line Move the flowtube to another location in the process line to

Flow rate is below 1 ft/s
(specification issue)

Insufficient upstream/downstream
pipe diameter

Cables for multiple magmeters run
through same conduit

Auto zero was not performed when the
coil drive frequency was changed from
5 Hz to 37.5 Hz

Flowtube failure—shorted electrode See Table 5-4 on page 5-8
Flowtube failure—shorted or open coil See Table 5-4 on page 5-8
Transmitter failure Replace the electronics board
Transmitter wired to correct flowtube Check wiring

Advanced Troubleshooting continued on next page

Rosemount 8712D

Eliminate cable vibration:

• Integral mount

• Move cable to lower vibration run

• Tie down cable mechanically

• Trim electrode and coil wires

• See “Conduit Cables” on page 2-14

• Route cable line away from other equipment
powered by 60 Hz

• Use 8712-0752-1,3 cable

Selection Guide (document number 00816-0100-3033), for
chemical compatibility with electrode material.

for wiring and grounding procedures

Service valve

(See Table 5-4 on page 5-8)

Perform analog output test.
Check all configuration variables for the transmitter, flowtube,

communicator, and/or control system

Check these other transmitter settings:
Flowtube calibration number
Units
Line size

Downsize the flowtube to increase the flow rate above 3 ft/s.
Periodically clean the flowtube

ensure that it is full under all conditions
See the accuracy specification for specific transmitter and

flowtube
Move flowtube to location where 5 pipe diameters upstream and

2 pipe diameters downstream is possible
Run only one conduit cable between each flowtube and

transmitter
Perform the auto zero function with full pipe and no flow

5-5

Reference Manual

00809-0100-4661, Rev AB

Rosemount 8712D

Table 5-3. Advanced Troubleshooting–Rosemount 8712D

Symptom Potential Cause Corrective Action

Noisy process Chemical additives upstream of

magnetic flowmeter

Sludge flows—mining/coal/sand/
slurries (other slurries with hard
particles)

Styrofoam or other insulating particles
in the process

Electrode coating Use bulletnose electrodes in the Rosemount 8705 Flowtube

Air in the line Move the flowtube to another location in the process line to

Meter output is unstable Electrode incompatibility Check the Magnetic Flowmeter Material Selection Guide

Improper grounding See “Grounding” on page 4-12
High local magnetic or electric fields Move the magnetic flowmeter (5 ft away is usually acceptable)
Sticky valve (Look for periodic

oscillation of meter output)

Complete the possible solutions listed under
“Step 2: Process Noise” on page 5-7
Move the injection point downstream of the magnetic flowmeter,
or move the magnetic flowmeter

Decrease the flow rate below 10 ft/s

Complete the possible solutions listed under
“Step 2: Process Noise” on page 5-7
Consult the factory.

Use a smaller flowtube to increase the flow rate above 3 ft/s
Periodically clean the flowtube

ensure that it is full under all conditions

(00816-0100-3033) for chemical compatibility with electrode
material located on www.rosemount.com

Service valve

November 2006

DIAGNOSTICS AND SERVICE

Analog Output Test The analog output test allows you to drive the transmitter output to a desired

Fast Keys 1, 2, 2

LOI Key Aux. Function

electrical current output on terminals 7 and 8. This capability allows you to
check the entire current loop prior to start-up. On the LOI the test will end after
five minutes if the transmitter is not returned to normal operation manually.

Pulse Output Test The pulse output test allows you to drive the frequency output at terminals 5

Fast Keys 1, 2, 3

LOI Key Aux. Function

and 6 to a desired value. This capability allows you to check auxiliary
equipment prior to start-up. On the LOI the test will end after five minutes if
the transmitter is not returned to normal operation manually.

Self Test The transmitter test initiates a series of diagnostic tests that are not performed

Fast Keys 1, 2, 1, 2

LOI Key Aux. Function

continuously during normal operation. It performs the following tests:

• Display Test

•RAM Test

•PROM Test

During the entire test, all outputs respond to flow signal. The test requires
about ten seconds to complete.

5-6

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

QUICK TROUBLESHOOTING

Step 1: Wiring Errors The most common magmeter problem is wiring between the flowtube and the

transmitter in remote mount installations. The signal wire and coil drive wire
must be twisted shielded cable: 20 AWG twisted shielded cable for the
electrodes and 14 AWG twisted shielded cable for the coils. Ensure that the
cable shield is connected at both ends of the electrode and coil drive cables.
Signal and coil drive wires must have their own cables. The single conduit that
houses both the signal and coil drive cables should not contain any other
wires. For more information on proper wiring practices, refer to Section 2:
Installation, “Transmitter to Flowtube Wiring” on page 2-12.

Step 2: Process Noise In some circumstances, process conditions rather than the magmeter can

cause the meter output to be unstable. Possible solutions for addressing a
noisy process situation are given below. When the output attains the desired
stability, no further steps are required.

Use the Auto Zero function to initialize the transmitter for use with the 37.5 Hz
coil drive mode only. Run this function only with the transmitter and flowtube
installed in the process. The flowtube must be filled with process fluid with
zero flow rate. Before running the auto zero function, be sure the coil drive
mode is set to 37.5 Hz.

Step 3: Installed Flowtube Tests

Set the loop to manual if necessary and begin the auto zero procedure. The
transmitter completes the procedure automatically in about 90 seconds. A
symbol appears in the lower right-hand corner of the display to indicate that
the procedure is running.

1. Change the coil drive to 37.5 Hz. Complete the Auto Zero function, if possible (see “Coil Drive Frequency” on page 3-15).

2. Increase the damping (see “Damping” on page 3-9).

If the preceding steps fail to resolve the process noise symptoms, consult
your Rosemount sales representative about using a high-signal magnetic
flowmeter system.

If a problem with an installed flowtube is identified, Table 5-4 can assist in
troubleshooting the flowtube. Before performing any of the flowtube tests,
disconnect or turn off power to the transmitter. To interpret the results, the
hazardous location certification for the flowtube must be known. Applicable
codes for the Rosemount 8705 are N0, N5, and KD. Applicable codes for the
Rosemount 8707 are N0 and N5. Applicable codes for the Rosemount 8711
are N0, N5, E5, and CD. Always check the operation of test equipment before
each test.

If possible, take all readings from inside the flowtube junction box. If the
flowtube junction box is inaccessible, take measurements as close as
possible. Readings taken at the terminals of remote-mount transmitters that
are more than 100 feet away from the flowtube may provide incorrect or
inconclusive information and should be avoided. A flowtube circuit diagram is
provided in Figure 5-1 on page 5-9.

5-7

Rosemount 8712D

Ω

Ω

Table 5-4. Flowtube Test

Test

A. Flowtube
Coil

B. Shields to
Case

C. Coil Shield
to Coil

D. Electrode
Shield to
Electrode

Flowtube
Location

Installed or
Uninstalled

Installed or
Uninstalled

Installed or
Uninstalled

Installed LCR (Set to

Required
Equipment

Multimeter 1 and 2 = R

Multimeter 17 and

Multimeter 1 and

Resistance
and 120 Hz)

Measuring at
Connections

and case

ground

17 and case
ground

2 and

18 and 17 = R
19 and 17 = R

Reference Manual

00809-0100-4661, Rev AB

November 2006

Expected Value Potential Cause Corrective Action

2Ω R18Ω≤≤

0.2Ω<

(< 1nS)

∞

(< 1nS)

∞

R1 and R2 should be stable

1

2

R1R–2300Ω≤

NO:
N5, E5, CD,

R1R–21500 Ω≤

ED:

• Open or
Shorted Coil

• Moisture in
terminal block

• Leaky electrode

• Process behind
liner

• Process behind
liner

• Leaky electrode

• Moisture in
terminal block

• Unstable R1 or
R

values

2

confirm coated
electrode

• Shorted
electrode

• Electrode not in
contact with
process

• Empty Pipe

• Low conductivity

• Leaky electrode

• Remove and
replace flowtube

• Clean terminal
block

• Remove
flowtube

• Remove
flowtube and dry

• Clean terminal
block

• Confirm with
flowtube coil
test

• Remove coating
from flowtube
wall

• Use bulletnose
electrodes

• Repeat
measurement

• Pull tube,
complete test in
Table 5-5 and
Table 5-6 on
page 5-10 out of
line.

To test the flowtube, a multimeter capable of measuring conductance in
nanosiemens is preferred. Nanosiemens is the reciprocal of resistance.

1nanosiemens

1

----------------------------=
1gigaohm

or

1

1nanosiemens

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

×

1109ohm

5-8

Reference Manual

00809-0100-4661, Rev AB
November 2006

Figure 5-1. Flowtube Circuit Diagram

Rosemount 8712D

68.1k (not applicable for
flowtubes with N0 hazardous
certification approval option
code)

68.1k

Flowtube Housing

Step 4: Uninstalled Flowtube Tests

8712-0007E04A

An uninstalled flowtube can also be used for flowtube troubleshooting. To
interpret the results, the hazardous location certification for the flowtube must
be known. Applicable codes for the Rosemount 8705 are N0, N5, and KD.
Applicable codes for the Rosemount 8707 are N0 and N5. Applicable codes
for the Rosemount 8711 are N0, N5, E5, and CD.

A flowtube circuit diagram is provided in Figure 5-1. Take measurements from
the terminal block and on the electrode head inside the flowtube. The
measurement electrodes, 18 and 19, are on opposite sides in the inside
diameter. If applicable, the third grounding electrode is in between the other
two electrodes. On Rosemount 8711 flowtubes, electrode 18 is near the
flowtube junction box and electrode 19 is near the bottom of the flowtube
(Figure 5-2). The different flowtube models will have slightly different
resistance readings. Flanged flowtube resistance readings are in Table 5-5
while wafer flowtube resistance readings are in Table 5-6.

See “Safety Information” on page 5-1 for complete warning information.

5-9

Rosemount 8712D

Figure 5-2. 45° Electrode Plane

Reference Manual

00809-0100-4661, Rev AB

November 2006

8711-8711f01a

To insure accuracy of resistance readings, zero out multimeter by shorting
and touching the leads together.

Table 5-5. Uninstalled Rosemount 8705 / 8707 Flanged Flowtube Tests

Hazardous Location Certifications

Measuring at Connections

18 and Electrode

19 and Electrode

17 and Grounding Electrode

17 and Ground Symbol

17 and 18 Open Open
17 and 19 Open Open
17 and 1 Open Open

(1) It is difficult to tell from visual inspection alone which electrode is wired to which number terminal in

the terminal block. Measure both electrodes. One electrode should result in an open reading, while
the other electrode should be less than 275 .

(1)

(1)

N0 N5, KD

275≤Ω

275≤Ω

0.3≤Ω 0.3≤Ω

0.3≤Ω 0.3≤Ω

Ω

61k Ω R75k≤≤ Ω

61k Ω R75k≤≤ Ω

Table 5-6. Uninstalled Rosemount 8711 Wafer Flowtube Tests

Hazardous Location Certification

Measuring at Connections

18 and Electrode

19 and Electrode

17 and Grounding Electrode

17 and Grounding Symbol

17 and 18 Open Open
17 and 19 Open Open
17 and 1 Open Open

(1) Measure the electrode closest to the junction box
(2) Measure the electrode farthest away from the junction box.

(1)

(2)

N0 N5, E5, CD

0.3≤Ω

275≤Ω

0.3≤Ω 0.3≤Ω

0.3≤Ω 0.3≤Ω

61k Ω R75k≤≤ Ω

61k Ω R75k≤≤ Ω

5-10

Reference Manual

00809-0100-4661, Rev AB
November 2006

Appendix A Reference Data

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-7

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-8

SPECIFICATIONS

Rosemount 8712D

Functional Specifications

Flowtube Compatibility

Rosemount 8712D is compatible with all Rosemount flowtubes: 8705, 8707,
8711, 8721, and 570TM. The 8712D is also compatible with AC and DC
powered flowtubes of other manufacturers.

Flowtube Coil Resistance

2.25  to 500 

Flowtube Coil Inductance

11mH to 1500mH

Flow Rate Range

Capable of processing signals from fluids that are traveling between 0.01 and

39.3 ft/s (0.003 to 12 m/s) for both forward and reverse flow in all flowtube
sizes. Full scale continuously adjustable between –39.3 and 39.3 ft/s
(–12 to 12 m/s).

www.rosemount.com

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

Conductivity Limits

Process liquid must have a conductivity of 5 microsiemens/cm (5
micromhos/cm) or greater. Excludes the effect of interconnecting cable length
in remote mount transmitter installations. For best performance, keep cable
lengths as short as possible in low conductivity fluids.

Power Supply

90-250 V ac, 50–60 Hz or 12–42 V dc

Supply Current Requirements

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

1.0

0.8

0.6

0.4

0.2

Supply Current (Amps)

0

0

10

20 30

Power Supply (Volts)

40

Installation Coordination

Installation (overvoltage) Category II

Power Consumption

10 watts maximum

Ambient Temperature Limits

Operating

–20 to 140°F (–29 to 60 °C) with local operator interface

–40 to 165°F (–40 to 74 °C) without local operator interface

Storage

–40 to 176 °F (–40 to 80 °C)

Humidity Limits

0–95% RH at 120 °F (49 °C)

50

8721/8721_B_01.EPS

A-2

Enclosure Ratings

NEMA 4X, CSA Enclosure Type 4X, IEC 529, IP65, Pollution Degree II

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Input/Output Signals

Analog Output Adjustment

4–20 mA, switch-selectable as internally or externally powered 5 to 30 V
dc; 0 to 1000 Ω load.

Engineering units—lower and upper range values are user-selectable.
Output automatically scaled to provide 4 mA at lower range value and 20

mA at upper range value. Full scale continuously adjustable between -39.3
and 39.3 ft/s (-12 to 12 m/sec), 1 ft/s (0.3 m/s) minimum span.

HART Communications, digital flow signal, superimposed on 4–20 mA
signal, available for control system interface. A minimum of 250 Ω required
for HART communications. Analog output will remain linear to 105% of
span. (Maximum output value of 20.8 mA.)

Scalable Frequency Adjustment

0-10,000Hz, externally powered at 5 to 24 V dc, solid state switch closure
supports loads up to 2W for frequencies up to 4000Hz, and 5 V dc loads at

0.1 W at maximum frequency of 10,000 Hz. Pulse can be set to equal
desired velocity or volume in user selectable engineering units. Pulse
width is adjustable from 1.5 to 500 msec. Below 1.5 msec pulse width the
pulse automatically switches to 50% duty cycle. Pulse output will remain
linear to 11,000 Hz.

Auxiliary Output Function

Externally powered at 5 to 28 V dc, solid state switch closure up to 2 W to
indicate either:

Reverse Flow: Activates switch closure output when reverse flow is
detected. The reverse flow rate is displayed.

Zero Flow: Activates switch closure output when flow goes to 0 ft/s.

Positive Zero Return (PZR)

Externally powered at 5 to 28 V dc, solid state input up to 2 W, requests
that the transmitter forces outputs to the zero flow rate signal level.

Software Lockout

Security lockout switch on the electronics board can be set to deactivate all
LOI and HART-based communicator functions, protecting configuration
variables from unwanted or accidental change. The Totalizer is not locked out
when the security lockout switch is in the “ON” position (see “Hardware
Switches” on page 2-4 for more information).

Output Testing

Analog Output Test

Transmitter may be set to supply a specified current between 3.50 and

23.25 mA

Pulse Output Test

Transmitter may be set to supply a specified frequency between 1 Hz and
10,000 Hz

A-3

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

Turn-on Time

5 minutes to rated accuracy from power up, 5 seconds from power
interruption

Start-up Time

50 milliseconds from zero flow

Low Flow Cutoff

Adjustable between 0.01 and 1 ft/s (0.003 and 0.3 m/s). Below selected value,
output is driven to the zero flow rate signal level.

Damping

Adjustable between 0.0 and 256 seconds from the LOI. Adjustable between

0.2 and 256 seconds from the 275 / 375 Handheld Communicators.

Flowtube Compensation

Rosemount flowtubes are flow-calibrated and assigned a calibration factor at
the factory. The calibration factor is entered into the transmitter, enabling
interchangeability of flowtubes without calculations or a compromise
in accuracy.

8712D transmitters and other manufacturer’s flowtubes can be calibrated at
known process conditions or at the Rosemount NIST-Traceable Flow Facility.
Transmitters calibrated on site require a two-step procedure to match known
flow rate.

A-4

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Performance Specifications

(System specifications are given using the frequency output and with the unit
at referenced conditions.)

Accuracy

Rosemount 8712D with 8705 and 8721 Flowtube

System accuracy is ±0.5% of rate from 1 to 39.3ft/s (0.3 to 12 m/s);
between 0.04 and 1.0 ft/s (0.01 and 0.3 m/s), the system has an accuracy
of ±0.005 ft/s. Analog output has the same accuracy as frequency output
plus an additional 0.10% of span.

Rosemount 8712D with 8711 Flowtube

System accuracy is ±0.5% of rate from 3to39.3ft/s (0.9to12 m/s); below
3 ft/s (0.9 m/s), the system has an accuracy of ±0.015 ft/s (0.005 m/s).
Analog output has the same accuracy as frequency output plus an
additional 0.10% of span.

Rosemount 8712D with Other Manufacturers’ Flowtubes

When calibrated in the Rosemount Flow Facility, system accuracies as
good as 0.5% of rate can be attained. Analog output has the same
accuracy as frequency output, plus an additional 0.10% of span.

There is no accuracy specification for other manufacturers’ flowtubes
calibrated in the process line.

Vibration Effect

±0.1% of minimum span
IEC 770-1984, Section 6.2.14, Extreme vibration levels (3Gs)

Repeatability

±0.1% of reading

Response Time (Analog Output)

50 milliseconds maximum response to step change in input

Stability

±0.1% of rate over six months

Ambient Temperature Effect

0.25% of rate over operating temperature range

RFI Effect

EN 61326 / 1997, NAMUR NE21 / 1997, CISPR 11 Class B Level

Supply Voltage Effect

Voltage Effect: 0.05% of span for 90 to 250 V AC rms
Frequency Effect: 0.1% of span for 47 to 64 Hz

Dead Time

At 5 Hz, up to 100 mS
At 37Hz, up to 13.3 mS

A-5

Rosemount 8712D

Physical Specifications Materials of Construction

Housing

Low-copper aluminum

Paint

Polyurethane

Cover Gasket

Rubber

Electrical Connections

Three ¾–14 NPT connections provided on the base of the transmitter. Screw
terminals provided for all of the connections. Power wiring connected to the
transmitter only. Remote mounted transmitters require only a single conduit
connection to the flowtube.

Line Power Fuses

90–250 V ac systems (8712D)

1 amp, Quick-acting Bussman AGC1 or equivalent

Reference Manual

00809-0100-4661, Rev AB

November 2006

12-42 V dc systems

3 amp, Quick-acting Bussman AGC3 or equivalent

Transmitter Weight

Transmitter approximately: 6.74 lbs. (3.06 kg)
Transmitter with local operator interface: 7.34 lbs. (3.33 kg)

A-6

Reference Manual

00809-0100-4661, Rev AB
November 2006

DIMENSIONAL DRAWINGS

Figure A-1. Rosemount 8712D Transmitter

Rosemount 8712D

LOI Cover

Standard

Cover

4.31

(109)

3.51
(89)

2.96
(75)

WITH LOI COVER

LOI Keypad

Cover

9.01

(229)

2.81
(71)

3.11
(79)

17.70 (450)

WITH STANDARD

COVER

0.44
(11)

11.15
(283)

12.02
(305)

NOTE
Dimensions are in inches (millimeters)

Ground Lug

¾–14 NPT

Conduit

Connection

(3 Places)

11.37
(289)

8712-12A01A, 8712B01A, 8712C01A, 8712D01A

A-7

Reference Manual

00809-0100-4661, Rev AB

Rosemount 8712D

November 2006

ORDERING INFORMATION

Model Product Description Availability

(1)

8712D

Code Transmitter Style

Code Power Supply Voltage

Code Product Certifications

Code Options

Typical Model Number: 8712D R 12 N 0 M 4

(1) Totalizer standard on all 8712D transmitters.
(2) NAMUR compliant operation and the Alarm latch options are preset at the factory and can not be changed to standard operation in the field.
(3) Option Code must be selected for both flowtube and transmitter.

Magnetic Flowmeter Transmitter •

R Remote (2-inch pipe or surface mounting) •

03 12–42 V dc •
12 90-250 V ac, 50–60 Hz •

N0 Factory Mutual (FM) Class I, Division 2 Approval for nonflammable fluids;

Canadian Standards Association (CSA) Class I, Division 2 Approval; CE Marking

N5 Factory Mutual (FM) Class I, Division 2 Approval for flammable fluids; CE Marking •

B6 Stainless Steel 4-bolt Kit for 2-inch Pipe Mount •
C1 Custom Configuration (Completed CDS required with order) •
C4 Analog Output Levels Compliant with NAMUR recommendations NE43, 18-January-1994, and high alarm level
CN Analog Output Levels Compliant with NAMUR recommendations NE43, 18-January-1994, and low alarm level
D1 High Accuracy Calibration [0.25% of rate from 3 to 39.3 ft/s (0.9 to 12 m/s)]

matched flowtube and transmitter system

M4 Local Operator Interface (LOI) •

J1 CM 20 conduit adapter •
J2 PG 13.5 conduit adapter •

(3)

(2)

(2)

•

•

•

•

A-8

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Appendix B Approval Information

European Directive Information . . . . . . . . . . . . . . . . . . . . page B-1

Hazardous Location Certifications . . . . . . . . . . . . . . . . . . page B-3

Approved Manufacturing Locations

EUROPEAN DIRECTIVE INFORMATION

Rosemount Inc. — Chanhassen, Minnesota, USA

Fisher-Rosemount Technologias de Flujo, S.A. de C.V. —
Chihuahua, Chihuahua, Mexico

The EC declaration of conformity for all applicable European directives for this
product can be found on our website at www.rosemount.com. A hard copy
may be obtained by contacting our local sales office.

ATEX Directive Rosemount Inc. complies with the ATEX Directive.

Type n protection type in accordance with EN50 021

• Closing of entries in the device must be carried out using the
appropriate EExe or EExn metal cable gland and metal blanking plug
or any appropriate ATEX approved cable gland and blanking plug with
IP66 rating certified by an EU approved certification body.

European Pressure Equipment Directive (PED) (97/23/EC)

Model 8705 Magnetic Flowmeter flowtubes in line size and flange combinations:

Line Size: 1 1/2 inch - 3 inch with all flanges available.

QS Certificate of Assessment - EC No. PED-H-20
Module H Conformity Assessment

Line Size: 4 inch - 24 inch with all DIN flanges and ANSI 150 and
ANSI 300 flanges.

QS Certificate of Assessment - EC No. PED-H-20
Module H Conformity Assessment

www.rosemount.com

Line Size: 30 inch - 36 inch with AWWA 125 flanges

QS Certificate of Assessment - EC No. PED-H-20
Module H Conformity Assessment

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

Model 8711 Magnetic Flowmeter Flowtubes
Line Sizes: 1.5, 2, 3, 4, 6, and 8 inch

QS Certificate of Assessment - EC No. PED-H-20
Module H Conformity Assessment

Electro Magnetic Compatibility (EMC) (89/336/EEC)

Model 8721 Sanitary Magmeter Flowtubes
in line sizes of 1

Module A Conformity Assessment

All other Model 8705/8711/8721 Flowtubes —
Sound Engineering Practice

Flowtubes that are SEP are outside the scope of PED and cannot be marked
for compliance with PED.

Mandatory CE-marking for flowtubes in accordance with Article 15 of the PED
can be found on the flowtube body (CE 0575).

Flowtubes in category I are assessed for conformity per module A
procedures.

Flowtubes in categories II – IV, use module H for conformity assessment
procedures.

EN 50081-1: 1992, EN 50082-2: 1995,
EN 61326: 1997/ A1:1998 / A2: 2001

Installed signal wiring should not be run together and should not be in the
same cable tray as AC power wiring.

Device must be properly grounded or earthed according to local electric
codes.

To improve protection against signal interference, shielded cable is
recommended, see Section 2: Installation for more information.

1

/2 inch and larger:

Low Voltage Directive (93/68/EEC)

Other important guidelines

EN 61010-1: 1995

Only use new, original parts.

To prevent the process medium escaping, do not unscrew or remove process
flange bolts, adapter bolts or bleed screws during operation.

Maintenance shall only be done by qualified personnel.

CE Marking is a standard on 8712D.

Compliance with European Union EMC and Low Voltage Directives.

B-2

Reference Manual

00809-0100-4661, Rev AB
November 2006

Rosemount 8712D

Hazardous Location Certifications

Remote-mounted systems do not require matched hazardous location
certification option codes on tube and transmitter.

Transmitter Approval Information

Table B-1. Transmitter Option Codes

Approval Codes Rosemount 8712D

N0 •
N5 •

North American Certifications

Factory Mutual (FM)

N0 Division 2 Approval (All transmitters)

Class I, Division 2, Groups A, B, C, D
Temp Codes – T4 (at 40°C),

Dust-ignition proof Class II/III, Division 1, Groups E, F, G
Temp Codes – T4 (at 40°C),

Enclosure Type 4X

N5 Division 2 Approval for flowtubes with IS electrodes only

Class I, Division 2, Groups A, B, C, D
Temp Codes – T4 (at 40°C),

Dust-ignition proof Class II/III, Division 1, Groups E, F, G
Temp Codes – T4

Enclosure Type 4X

Canadian Standard Association (CSA)

N0 Division 2 Approval

Class I, Division 2, Groups A, B, C, D
Temp Codes – T4 (at 60°C),

Dust-ignition proof Class II/III, Division 1, Groups E, F, G
Temp Codes – T4 (at 60°C),

Enclosure Type 4X

B-3

Rosemount 8712D

Reference Manual

00809-0100-4661, Rev AB

November 2006

Flowtube Approval Information

Table B-2. Flowtube Option Codes

Rosemount 8705 Flowtube Rosemount 8707 Flowtube Rosemount 8711 Flowtube

For

Approval

Codes

CD
KD

(1) CE Marking is standard on Model 8705 and 8711. No hazardous location certifications are available on the

(2) Refer to Table B-3 on page B-6 for relation between ambient temperature, process temperature, and

Non-flammable

Fluids

N0 • • •
N5 • • • • • •
E5 • •

(2)

(2)

Model 570TM.

temperature class.

••

For

Flammable

Fluids

(1)

For

Non-flammable

Fluids

For

Flammable

Fluids

For

Non-flammable

Fluids

• •

Flammable

Fluids

Factory Mutual (FM)

N0 Division 2 Approval for Non-Flammable Fluids (All Flowtubes)

Class I, Division 2, Groups A, B, C, D
Temp Code – T5 (8705/8711 at 60°C)
Temp Code – T3C (8707 at 60°C)

Dust-Ignition proof Class II/III, Division 1, Groups E, F, G
Temp Code – T6 (8705/8711 at 60°C)
Temp Code – T5 (8707 at 60°C)

Enclosure Type 4X

N5 Division 2 Approval for Flammable Fluids (All Flowtubes)

Class I, Division 2, Groups A, B, C, D
Temp Code – T5 (8705/8711 at 60°C)
Temp Code – T3C (8707 at 60°C)

Dust-Ignition proof Class II/III, Division 1, Groups E, F, G
Temp Code – T6 (8705/8711 at 60°C)
Temp Code – T5 (8707 at 60°C)

Enclosure Type 4X

E5 Explosion-Proof (8711 Only)

Explosion-Proof for Class I, Division 1, Groups C, D
Temp Code – T6 at 60°C

Dust-Ignition proof Class II/III, Division 1, Groups E, F, G
Temp Code – T6 at 60°C

Class I, Division 2, Groups A, B, C, D
Temp Code – T5 at 60°C

Enclosure Type 4X

For

B-4

Canadian Standards Association (CSA)

N0 Suitable for Class I, Division 2, Groups A, B, C, D

Temp Code – T5 (8705/8711 at 60°C)
Temp Code – T3C (8707 at 60°C)

Dust-Ignition proof Class II/III, Division 1, Groups E, F, G

Enclosure Type 4X