Rosemount Manual: Magnetic Flow Meter Transmitter - Model 8712D | Rosemount 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
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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
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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
Reference Manual
00809-0100-4661, Rev AB
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
00809-0100-4661, Rev AB
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
00809-0100-4661, Rev AB
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
00809-0100-4661, Rev AB
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.
2-4
Reference Manual
00809-0100-4661, Rev AB
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
00809-0100-4661, Rev AB
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)
2-7
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
Reference Manual
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
Reference Manual
00809-0100-4661, Rev AB
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
Reference Manual
00809-0100-4661, Rev AB
Rosemount 8712D
November 2006
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
2-12
Reference Manual
00809-0100-4661, Rev AB
November 2006
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.
2-13
Reference Manual
00809-0100-4661, Rev AB
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.
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
2-14
Reference Manual
00809-0100-4661, Rev AB
November 2006
Rosemount 8712D
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
2-15
Rosemount 8712D
Reference Manual
00809-0100-4661, Rev AB
November 2006
2-16
Reference Manual
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November 2006
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
00809-0100-4661, Rev AB
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.
3-2
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