Rosemount 8712C User manual

Model 8712C/U/H Magnetic
Flowmeter Transmitters
00809-0100-4729
English
Rev. CA

Product Manual
Model 8712C/U/H
Magnetic Flowmeter
Transmitters
Rosemount, the Rosemount logotype, and SMART FAMILY are registered trademarks of Rosemount Inc.
PlantWeb is a trademark of the Fisher-Rosemount group of companies.
HART is a registered trademark of the HART Communication Foundation.
Hastelloy is a registered trademark of Haynes International.
Teflon and Tefzel are registered trademarks of E.I. du Pont de Nemours & Co.
Ryton is a registered trademark of Phillips Petroleum Co.
Cover Photo: 8712-006AB
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 a.m. to 7:00 p.m. CST)
North American Response Center:
Equipment service needs
1-800-654-7768 (
24 hours a day – Includes Canada)
For equipment service or support needs outside the United States, contact your
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.
SNF-0004
NOTICE
Fisher-Rosemount satisfies all obligations coming from legislation
to harmonize product requirements in the European Union.
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317 USA
Tel [phone]
Fax [phone]
© 2000 Rosemount, Inc.
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Table of Contents
i
SECTION 1
Introduction Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
SECTION 2
Installation Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Transmitter Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Mount the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Identify Options and Configurations . . . . . . . . . . . . . . . . . . . . 2-3
Hardware Jumpers/Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Conduit Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Conduit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Options, Considerations, and Procedures . . . . . . . . . . . . . . . . . . . . 2-9
Connect Transmitter Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Connect 4–20 mA Loop External Power Source . . . . . . . . . . . . 2-10
Connect Pulse Output Power Source . . . . . . . . . . . . . . . . . . . . 2-11
Connect Auxiliary Output Control . . . . . . . . . . . . . . . . . . . . . . 2-12
Connect Positive Zero Return (PZR) Power Source . . . . . . . . . 2-13
Flowtube Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Rosemount Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Flowtubes of Other Manufacturers . . . . . . . . . . . . . . . . . . . . . 2-14
Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Installation Check and Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
SECTION 3
Local Operator
Interface
Local Operator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Basic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Data Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Selecting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
LOI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table Value Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Select Value Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
SECTION 4
Device Software
Functions
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

ii
Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Analog Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Pulse Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
D/A Trim and (4–20 mA Output Trim) . . . . . . . . . . . . . . . . . . . 4-3
Scaled D/A Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Electronics Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Auto Zero Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Universal Auto Trim (Model 8712U Only) . . . . . . . . . . . . . . . . 4-5
Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Flow Rate Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
URV (Upper Range Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
LRV (Lower Range Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Line Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Calibration Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Detailed Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Pulse Output Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Special Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
User-Defined Volume Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Base Volume Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Conversion Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Base Time Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
User-Defined Flow Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Auxiliary Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Measure Gross Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Start Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Stop Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Reset Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Low Flow Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Coil Drive Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Control Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Signal Processing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Number of Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Maximum Percent Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Time Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Review Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Miscellaneous Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Coil Current (Model 8712U Only) . . . . . . . . . . . . . . . . . . . . . . . 4-16
Transmitter Gain (Model 8712U Only) . . . . . . . . . . . . . . . . . . 4-16
Flowtube Gain (Model 8712U Only) . . . . . . . . . . . . . . . . . . . . . 4-16
Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Flowtube Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Flowtube Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Liner Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Electrode Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Electrode Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Multidrop Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

iii
SECTION 5
Troubleshooting Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Basic Transmitter Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Advanced Transmitter Troubleshooting . . . . . . . . . . . . . . . . . . . . . 5-3
Software Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Analog Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Pulse Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Transmitter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Flowtube Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Process Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Replacing the Electronics Module . . . . . . . . . . . . . . . . . . . . . . 5-7
Replacing the LOI Electronics . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
SECTION 6
Specifications Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Standard Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Custom Configuration (Option Code C1). . . . . . . . . . . . . . . . . . . . . 6-8
APPENDIX A
HART
Communicator
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Connections and hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Basic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Action Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Alphanumeric and Shift Keys . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
HART Fast Key Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Menus and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Online Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
APPENDIX B
Wiring Diagrams Rosemount Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Model 8705/8707/8711 Flowtubes to
Model 8712C/U Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Model 8707 High-Signal Flowtube to Model 8712H
High-Signal Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Model 8701 Flowtube to Model 8712U Transmitter . . . . . . . . B-4
Model 8705 Flowtube to Model 8712U Transmitter . . . . . . . . B-5
Model 8711 Flowtube to Model 8712U Transmitter . . . . . . . . B-6
Brooks Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Model 5000 Flowtube to Model 8712U Transmitter . . . . . . . . B-7
Model 7400 Flowtube to Model 8712U Transmitter . . . . . . . . B-8
Endress And Hauser Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9
Endress and Hauser Flowtube to Model 8712U Transmitter . B-9

iv
Fischer And Porter Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-10
Model 10D1418 Flowtube to Model 8712U Transmitter . . . . . B-10
Model 10D1419 Flowtube to Model 8712U Transmitter . . . . . B-11
Model 10D1430 Flowtube (Remote) to
Model 8712U Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12
Model 10D1430 Flowtube (Integral) to
Model 8712U Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-13
Model 10D1465 and Model 10D1475 Flowtubes (Integral) to
Model 8712U Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14
Fischer and Porter Flowtube to Model 8712U Transmitter . . B-15
Foxboro Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16
Series 1800 Flowtube to Model 8712U Transmitter . . . . . . . . B-16
Series 1800 (Version 2) Flowtube to Model 8712U Transmitter B-17
Series 2800 Flowtube to Model 8712U Transmitter . . . . . . . . B-18
Foxboro Flowtube to Model 8712U Transmitter . . . . . . . . . . . B-19
Kent Veriflux VTC Flowtube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-20
Veriflux VTC Flowtube to Model 8712U Transmitter . . . . . . . B-20
Kent Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Kent Flowtube to Model 8712U Transmitter . . . . . . . . . . . . . . B-21
Krohne Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-22
Krohne Flowtube to Model 8712U Transmitter . . . . . . . . . . . . B-22
Taylor Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-23
Series 1100 Flowtube to Model 8712U Transmitter . . . . . . . . B-23
Taylor Flowtube to Model 8712U Transmitter . . . . . . . . . . . . B-24
Yamatake Honeywell Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . B-25
Yamatake Honeywell Flowtube to Model 8712U Transmitter B-25
Yokogawa Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-26
Yokogawa Flowtube to Model 8712U Transmitter . . . . . . . . . B-26
Generic Manufacturer Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . B-27
Generic Manufacturer Flowtube to Model 8712U Transmitter B-27
Identify the Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-27
Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-27

Section
1-1
1Introduction
MANUAL SCOPE The Series 8700 Magnetic Flowmeter System combines a Rosemount
magnetic flowmeter flowtube and Rosemount magnetic flowmeter
transmitter. This manual covers the Model 8712C/U/H Magnetic
Flowmeter Transmitter. For specific magnetic flowtube information,
refer to the Series 8700 Magnetic Flowmeter Flowtubes manual
(document number 00809-0100-4727).
Section 1: Introduction
• scope of the manual
• brief system and operation description
Section 2: Installation
• step by step instructions for installation and start-up
Section 3: Local Operator Interface
• Local Operator Interface (LOI)
• configuration information for the Model 8712C/U/H
Section 4: Device Software Functions
• basic software configuration functions
• special configuration modes
Section 5: Troubleshooting
• troubleshooting tables
• software test procedures
• hardware procedures for diagnosing and repairing problems
Appendix A: HART®Communicator
• operational features of the HART Communicator
• menu tree
• Fast Key Sequence table
• diagnostic messages
Appendix B: Wiring Diagrams
• specific wiring diagrams for the connecting of the
Model 8712C/U/H to most flowtubes currently available
• generic wiring diagram
Attempting to install and operate the Model 8705, Model 8707 High-Signal, or
Model 8711 Magnetic Flowmeter Flowtubes with the Model 8712, Model 8732, or
Model 8742 MagneticFlowmeter Transmitter without reviewing the instructions
contained in this manual could result in personal injury or equipment damage.

Model 8712C/U/H Magnetic Flowmeter Transmitters
1-2
SYSTEM DESCRIPTION A Rosemount Series 8700 Magnetic Flowmeter System measures
volumetric flow rate by detecting the velocity of a conductive liquid that
passes through a magnetic field. The system consists of two major
assemblies: the Model 8705, the Model 8707 High-Signal, or
Model 8711 Magnetic Flowmeter Flowtube combined with a magnetic
flowmeter transmitter.
The flowtube is installed in-line with process piping, either vertically or
horizontally. Coils located on opposite sides of the flowtube create the
necessary magnetic field. A conductive liquid moving through the
magnetic field generates a voltage that is detected by two electrodes.
The transmitter drives the coils to generate the magnetic field and
electronically conditions the voltage detected by the electrodes. The
transmitter than produces analog and frequency output signals
proportional to the liquid velocity.

Section
2-1
2Installation
INTRODUCTION This section covers the installation procedures for the
Model 8712C/U/H Magnetic Flowmeter Transmitter. See the flowtube
manual (document number 00809-0100-4727) for specific flowtube
installation procedures.
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.
TRANSMITTER SYMBOLS Caution symbol — check product documentation for details
Protective conductor (grounding) terminal
Failure to follow these installation guidelines could result in death or serious injury:
Installation and servicing instructions are for use byqualified personnel only.Failure to
follow safe installation guidelines or performing any servicing other than that contained
in this manual may result in death or serious injury. Do not perform any servicing other
than that contained in the operating instructions, unless qualified.
Explosions can cause death or serious injury. Verify that the operating
environment of the flowtube and transmitter is consistent with the appropriate FM
or CSA approval.
Do not connect a Model 8712C/U/H to a non-Rosemount flowtube that is located in
an explosive atmosphere.
Failure to comply could result in an electrical spark or an explosion.

Model 8712C/U/H Magnetic Flowmeter Transmitters
2-2
PRE-INSTALLATION Before installing the Model 8712C/U/H 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 Model 8712C/U/H 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 an
upright position.
If the Model 8712C/U/H is mounted separately from the flowtube, it
is not subject to limitations that might apply to the flowtube. For
considerations regarding the installation of the flowtube, please
refer to the flowtube manual (document number 00809-0100-4727).
FIGURE 2-1. Model 8712C/U/H Dimensional Drawing
4.31
(109)
LOI Cover
Standard
Cover
LOI Keypad
Cover
3.51
(89)
9.01
(229)
11.15
(283)
2.81
(71) 3.11
(79)
12.02
(305)
0.44
(11)
17.70 (450)
11.37
(289)
Ground Lug
¾–14 NPT
Conduit
Connection
(3 places)
With LOI Cover With Standard
Cover
NOTE
Dimensions are in
inches (millimeters).
8712-12A01A, 8712B01A, 8712C01A, 8712D01A
2.96
(75)

2-3
Installation
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.
Both remotely and integrally mounted Model 8712C/U/H transmitters
require external power and there must be access to a suitable power
source. See Transmitter Input Power on page 2-7.
INSTALLATION
PROCEDURES
Model 8712C/U/H installation includes both detailed mechanical and
electrical installation procedures. Before undertaking the installation
instructions outlined below, review the application and related
considerations and requirements. When you understand the system
requirements, proceed with installation.
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. Mounting hardware is
included with remote-mounted transmitters.
Pipe Mounting
To mount the transmitter on a pipe:
1. Attach the mounting plate to the pipe using the
mounting hardware.
2. Attach the Model 8712C/U/H to the mounting plate using the
mounting screws.
Surface Mounting
To surface mount the transmitter:
1. Attach the Model 8712C/U/H to the mounting location using the
mounting screws.
Identify Options and
Configurations The standard application of the Model 8712C/U/H 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)
• Ultrasonic Control
• 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.
See Safety Messages on page 2-1 for complete warning information.

Model 8712C/U/H Magnetic Flowmeter Transmitters
2-4
Hardware
Jumpers/Switches The Model 8712C/U/H electronics board is equipped with
three user-selectable hardware switches (see Figure 2-2). These
switches set the Failure Alarm Mode, Internal/External Analog Power,
and Transmitter Security.
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 Model 8712C/U/H 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 Model 8712C/U/H 4–20 mA loop may be powered internally
or by an external power supply. The internal/external power supply
jumper determines the source of the 4–20 mA loop power.
Transmitters are shipped from the factory with the jumper set
in the INTERNAL position.
The external power option is required for multidrop communications
applications. A 10–30 V dc external supply is required and the jumper
must be reset. For further information on 4–20 mA external power, see
Connect 4–20 mA Loop External Power Source on page 2-10.
Transmitter Security There is a jumper on the Model 8712C/U/H that allows the user to lock
out any configuration changes attempted on the transmitter. No
changes to the configuration are allowed when the jumper is in the ON
position. The flow rate indication and totalizer functions remain active
at all times.
With the jumper 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.
Hardware
Switch
Standard Configuration
(as shipped from factory)
Failure Alarm Mode: HIGH
Internal/External
Analog Power: INTERNAL
Transmitter Security: OFF

2-5
Installation
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 below:
NOTE
The hardware switches are located on the solder 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 or jumper (see Figure 2-2).
4. Switches: Change the setting of the desired switches with a
small screwdriver.
Jumpers: Pull the jumper off of its current setting and connect to
the desired setting.
5. Close the housing door and tighten the housing door screw.
FIGURE 2-2. Model 8712C/U/H Electronics Board and Hardware Switches/Jumpers
Electrical Considerations Before making any electrical connections to the Model 8712C/U/H,
consider the following standards and be sure to have the proper power
supply, conduit, and other accessories.
Failure
Alarm Mode
Internal/External
Analog Power
Transmitter
Security
8712-013AB

Model 8712C/U/H Magnetic Flowmeter Transmitters
2-6
Conduit Connections Both the flowtube and transmitter junction boxes have ports for
¾–inch NPT conduit connections. If some of these ports are not being
used, conduit seals will need to be installed. In some cases, conduits
may also require drainage if there is a possibility of moisture build-up
in the line.
A dedicated conduit line is required for the coil drive and electrode
cables that connect the flowtube to the transmitter (see Figure 2-4 on
page 2-7). Separate conduits are not necessary for the two cables, but a
dedicated conduit line between each transmitter and flowtube is
required. Instructions for installation of the conduit begin on page 2-6.
Conduit Installation If ¾-inch NPT conduit is not installed between the flowtube and
transmitter, install the conduit.
NOTE
A dedicated conduit line is required between each transmitter and
flowtube. See page 2-7 for further information on conduit layout
and design.
1. Install the conduit for operating options used in your application.
2. Connect the ¾-inch NPT conduit to the transmitter and to the
flowtube in accordance with local or plant electrical codes.
3. Seal unused ports to prevent moisture or other contamination
from entering the junction box.
NOTE
Do not overtighten metal plugs used to seal wiring compartment ports;
overtightening can damage the housing.
Conduit Cables Run the appropriate size cable through the conduit connections in your
magnetic flowmeter system.
1. Run the power cable from the power source to the transmitter.
2. Run the coil drive and electrode cables between the flowmeter
and transmitter.
3. Run any additional cables required for your application and the
applicable options.
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.
NOTE
Excessive lead length can cause unwanted transmitter noise.

2-7
Installation
FIGURE 2-3. Cable Preparation
FIGURE 2-4. Conduit Preparation
Conduit Cables Cables to be used in the conduit for coil drive and electrode connections
must meet the standards shown in Table 2-1.
TABLE 2-1. Recommended Cable Specifications
T rans mi tt er Inp ut Power
1.0
(25)
NOTE
Dimensions are in
inches (millimeters).
8712-0041A
Cable Shield
Coil Drive and
Electrode Cables Coil Drive and
Electrode Cables
Power
Outputs
Power
Outputs
Incorrect Correct
Power
Outputs
Power
Outputs
8705-0000A01A, 0000A01B
Description Rosemount Part Number
Signal Cable (20 AWG)
Belden 8762, Alpha 2411 equivalent 08712-0061-0001
Coll Drive Cable (14 AWG)
Belden 8720, Alpha 2442 equivalent 08712-0060-0001
Combination Signal and Coil
DriveCable(18AWG)
(1)
Belden 9368 equivalent
(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 100 ft (30 m).
08712-0750-0001

Model 8712C/U/H Magnetic Flowmeter Transmitters
2-8
Transmitter Input Power The Model 8712C/U/H transmitter is designed to be powered by 10–30 V
dc, 115 V ac, or 230 V ac. The seventh and eighth digits in the transmitter
model number designates the appropriate power supply requirement.
Supply Wire Temperature Rating
Use 12 to 18 AWG wire. For connections in ambient temperatures
exceeding 60 °C (140 °F), use wire rated to at least 90 °C (194 °F).
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 115 V ac or 230 V ac Power Supply
Wire the transmitter according to local electrical requirements for
115 V ac or 230 V ac. In addition, follow the supply wire and disconnect
requirements below:
Requirements for 10–30 V dc Power Supply
Units powered with 10–30 V dc may draw up to 2 amps of current. As a
result, the input power wire must meet certain gauge requirements.
Table 2-2 and Table 2-3 show the maximum wire length for
corresponding supply voltages, wire gauges, and wire type.
Figure 2-5 shows the surge current for each corresponding supply
voltage. For combinations not shown, you can calculate the maximum
distance given the surge current, the voltage of the source, and the
minimum start-up voltage of the transmitter, 10 V dc, using the
following equation:
Use Table 2-2 and Table 2-3 to determine the maximum wire length
allowable for your power supply and maximum resistance.
TABLE 2-2. Length of Annealed Copper (Cu) Wires
TABLE 2-3. Length of Hand-drawn Copper (Cu) Wires
MaximumResis cetan SupplyVoltage 10Vdc–
SurgeCurrent
-------------------------------------------------------------------=
Types of
Power Supply Wires Maximum Length of the Wire for Each Corresponding Power Supply Source
Wire Gauge Annealed Cu milliohms/ft
(milliohms/m)
30 V Supply
ft (m) 24 V Supply ft (m) 20 V Supply ft (m) 14 V Supply ft (m)
20 10.15 (33.29) 1,230 (375) 625 (191) 365 (111) 115 (35)
18 6.385 (20.94) 1,955 (596) 990 (302) 585 (178) 185 (56)
16 4.016 (13.17) 3,110 (948) 1,580 (482) 930 (283) 295 (90)
14 2.525 (8.28) 4,950 (1,509) 2,515 (767) 1,485 (453) 475 (145)
12 1.588 (5.21) 7,870 (2,399) 3,995 (1,218) 2,360 (719) 755 (230)
10 0.999 (3.28) 12,510 (3,813) 6,355 (1,937) 3,750 (1,143) 1,200 (366)
Types of
Power Supply Wires Maximum Length of the Wire for Each Corresponding Power Supply Source
Wire Gauge Hand-drawn Cu milliohms/ft
(milliohms/m)
30 V Supply
ft (m) 24 V Supply ft (m) 20 V Supply ft (m) 14 V Supply ft (m)
18 6.640 (21.78) 1,880 (573) 955 (291) 565 (172) 180 (55)
16 4.176 (13.70) 2,990 (911) 1,520 (463) 895 (273) 285 (87)
14 2.626 (8.61) 4,760 (1,451) 2,415 (736) 1,425 (434) 455 (139)
12 1.652 (5.42) 7,565 (2,306) 3,840 (1,170) 2,270 (692) 725 (221)
10 1.039 (3.41) 12,030 (3,667) 6,110 (1862) 3,605 (1,099) 1,155 (352)

2-9
Installation
FIGURE 2-5. Supply Current versus Input Voltage
OPTIONS,
CONSIDERATIONS, AND
PROCEDURES
If your application of the Model 8712C/U/H 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
Model 8712C/U/H.
Connect Transmitter Power To connect power to the transmitter, complete the following steps.
1. Ensure that the power source and connecting cable meet the
requirements outlined in Transmitter Input Power 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 follows:
• Connect ac Neutral/dc- to terminal N.
• Connect ac Line/dc+ to terminal L1.
• Connect ac Ground/dc Ground to the ground screw.
FIGURE 2-6. Transmitter
Power Connections
Surge
Nominal
S
upp
l
y
C
urrent
(A
mperes
)
Input Voltage (Volts)
8712-0388A
Transmitter
Power Cable
ac Neutral or dc–
ac Line or dc+
ac Ground or
dc Ground
Fuse
8712-8712E01B

Model 8712C/U/H Magnetic Flowmeter Transmitters
2-10
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 jumper is in the
internal position. The user-selectable power supply jumper 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 HART
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 analog
power source (see Multidrop Communications on page 4-18). If a
HART 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 2-5.
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.
FIGURE 2-7. 4–20 mA Loop Power Connections
–4–20 mA power+4–20 mA power
Fuse
8712-8712E01B