Rosemount 8712D Magnetic - Southeastern Automation

Rosemount 8712D Magnetic - Southeastern Automation
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D Magnetic
Flowmeter Transmitter
www.rosemount.com
Reference Manual
00809-0100-4661, Rev AA
March 2004
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 AA
March 2004
Rosemount 8712D
Table of Contents
SECTION 1
Introduction
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
SECTION 2
Installation
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
Identify Options and Configurations . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Hardware Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Conduit Ports and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Conduit Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
Rosemount 8712D
SECTION 3
Configuration
TOC-2
00809-0100-4661, Rev AA
March 2004
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Installation Check and Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Local Operator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Basic Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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 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
Coil Drive Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Control Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Signal Processing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Number of Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Maximum Percent Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Time Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Review Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Miscellaneous Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Flowtube Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
Fast Key Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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
TOC-3
Reference Manual
Rosemount 8712D
00809-0100-4661, Rev AA
March 2004
SECTION 5
Maintenance and
Troubleshooting
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
APPENDIX A
Reference Data
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
APPENDIX B
Approval Information
Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . B-1
European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
ATEX Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
Flowtube Approval Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
APPENDIX C
Digital Signal Processing
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2
Auto Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2
Signal Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2
TOC-4
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00809-0100-4661, Rev AA
March 2004
APPENDIX D
Wiring Diagrams
Rosemount 8712D
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 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .D-12
Model 10D1430 Flowtube (Integral) to
Rosemount 8712D Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .D-13
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 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .D-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 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .D-25
Yokogawa Flowtubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-26
Yokogawa Flowtube to Rosemount 8712D Transmitter . . . . . . . .D-26
Generic Manufacturer Flowtubes. . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27
Generic Manufacturer Flowtube to
Rosemount 8712D Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .D-27
Identify the Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27
Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27
TOC-5
Reference Manual
Rosemount 8712D
TOC-6
00809-0100-4661, Rev AA
March 2004
Reference Manual
00809-0100-4661, Rev AA
March 2004
Section 1
Rosemount 8712D
Introduction
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
SYSTEM DESCRIPTION
The Rosemount® 8700 Series Magnetic Flowmeter System consists of a
flowtube and transmitter, and measures volumetric flow rate by detecting the
velocity of a conductive liquid that passes through a magnetic field. Magnetic
Flowmeter Systems consist of a flowtube and a transmitter. 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 8712C/D/U/H
•
Rosemount 8732C
•
Rosemount 8742C
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 can be integrally mounted or remotely mounted from the flowtube.
This manual is designed to assist in the installation and operation of the
Rosemount 8712D Magnetic Flowmeter Transmitter and the 8700 Series
Magnetic Flowtubes.
www.rosemount.com
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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 AA
March 2004
Section 2
Rosemount 8712D
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
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:
Mechanical
Considerations
Protective conductor (grounding) terminal
•
Identify the options and configurations that apply to your application
•
Set the hardware switches if necessary
•
Consider mechanical, electrical, and environmental requirements
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
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March 2004
Rosemount 8712D
Figure 2-1. Rosemount 8712D
Dimensional Drawing
4.31
(109)
3.51
(89)
With LOI Cover
9.01
(229)
3.11
2.81
(79)
(71)
With Standard Cover
0.44
(11)
Standard
Cover
11.15
(283)
12.02
(305)
2.96
(75)
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.
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March 2004
Rosemount 8712D
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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March 2004
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.
8712/8712R01A.EPS
Figure 2-2. Rosemount 8712D
Electronics Board and Hardware
Switches
Conduit Ports
and Connections
Both the flowtube and transmitter junction boxes have ports for ¾-inch NPT
conduit connections. These connections should be made in accordance with
local or plant electrical codes. Unused ports should be sealed with metal
plugs. Proper electrical installation is necessary to prevent errors due to
electrical noise and interference. Separate conduits are not necessary for the
two cables, but a dedicated conduit line between each transmitter and
flowtube is required. Shielded cable must be used for best results in
electrically noisy environments.
2-5
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March 2004
Rosemount 8712D
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
1.00
(26)
NOTE
Dimensions are in
inches
(millimeters).
Cable Shield
Electrical Considerations
8705_0041A.EPS
Conduit Cables
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
03
12
Power Supply Requirement
12-42 V dc
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.
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.
2-6
Reference Manual
00809-0100-4661, Rev AA
March 2004
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:
SupplyVoltage – 12 Vdc
MaximumResis tan ce = -----------------------------------------------------------------1amp
Use Table 2-1 and Table 2-2 to determine the maximum wire length allowable
for your power supply and maximum resistance.
Table 2-1. Length of Annealed
Copper (cu) Wires
Types of Power
Supply Wires
Wire
Gauge
20
18
16
14
12
10
Table 2-2. Length of
Hand-drawn Copper (cu) Wires
Annealed Cu
milliohms/ft
(milliohms/m)
0.01015
(0.033292)
0.006385
(0.020943)
0.004016
(0.013172)
0.002525
(0.008282)
0.001588
(0.005209)
0.000999
(0.003277)
Types of Power
Supply Wires
Wire
Gauge
18
16
14
12
10
Annealed Cu
milliohms/ft
(milliohms/m)
0.00664
(0.021779)
0.004176
(0.013697)
0.002626
(0.008613)
0.001652
(0.005419)
0.01039
(0.003408)
Maximum Length of the Wire for Each
Corresponding Power Supply Source
42 V dc
Supply ft (m)
30 V dc
Supply ft (m)
20 V dc
Supply ft (m)
12.5 V dc
Supply ft (m)
1478
(451)
2349
(716)
3735
(1139)
5941
(1811)
9446
(2880)
15015
(4578)
887
(270)
1410
(430)
2241
(683)
3564
(1087)
5668
(1728)
9009
(2747)
394
(120)
626
(191)
996
(304)
1584
(483)
2519
(768)
4004
(1221)
25
(8)
39
(12)
62
(19)
99
(30)
157
(48)
250
(76)
Maximum Length of the Wire for
Each Corresponding Power Supply Source
42 V dc
Supply ft (m)
30 V dc
Supply ft (m)
20 V dc
Supply ft (m)
12.5 V dc
Supply ft (m)
2259
(689)
3592
(1095)
5712
(1741)
9080
(2768)
14437
(4402)
1355
(413)
2155
(657)
3427
(1045)
5448
(1661)
8662
(2641)
602
(184)
958
(292)
1523
(464)
2421
(738)
3850
(1174)
38
(11)
60
(18)
95
(29)
151
(46)
241
(73)
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March 2004
Rosemount 8712D
Figure 2-4. Supply Current
versus Input Voltage
1.0
0.6
0.4
0.2
0
0
20
10
40
30
50
8721/8721_B_01.EPS
Supply Current (Amps)
0.8
Power Supply (Volts)
Installation Category
The installation category for the Rosemount 8712D is
(Overvoltage) Category II.
Overcurrent Protection
The Rosemount 8712D Flowmeter Transmitter requires overcurrent
protection of the supply lines. Maximum ratings of overcurrent devices are as
follows:
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
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.
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 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
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March 2004
Rosemount 8712D
Figure 2-5. Transmitter Power
Connections
ac Line or dc+
ac Ground or
dc Ground
ac Neutral or dc–
Transmitter
Power Cable
Connect 4–20 mA Loop
External Power Source
8712-8712E01B
Fuse
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.
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March 2004
Rosemount 8712D
Figure 2-6. 4–20 mA Loop
Power Connections
+4–20 mA power
Connect Pulse Output
Power Source
8712-8712E01B
Fuse
–4–20 mA power
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.
Refer to Figure 2-7 and Figure 2-8.
+
Electro-mecha
nical Counter
2-10
–
–
–
+
+
5–28 V dc
Power
Supply
8712-8712L11A
Figure 2-7. Connecting to a
Electromechanical
Totalizer/Counter
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Figure 2-8. Connecting to a
Electronic Totalizer/Counter
without Integral Power Supply
5–28 V dc
Power
Supply
–
–
Electronic
Counter
+
1k to 100 k
Typical 5 k
Connect Digital Output 1
–
8712-8712L11C
+
+
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.
Fuse
Control Relay
or Input
dc–
dc+
8712-8712E01B
Figure 2-9. Connect Digital
Output 1 to Relay or Input to
Control System
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March 2004
Rosemount 8712D
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.
Fuse
+
-
5-28 V dc
Power Supply
Relay contact or control
system output
8712-8712E01H
Figure 2-10. Connecting Digital
Input 2
FLOWTUBE
CONNECTIONS
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.
2-12
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March 2004
Rosemount 8712D
Figure 2-11. Conduit Preparation
Correct
Outputs
Power
Coil Drive
and
Electrode
Cables
Coil Drive
and
Electrode
Cables
Power
Outputs
Outputs
Power
8721/0000A01A, 0000A01B.EPS
Power
Incorrect
Outputs
Table 2-3. Cable Requirements
Description
Signal Cable (20 AWG) Belden 8762, Alpha 2411 equivalent
Coil Drive Cable (14 AWG) Belden 8720, Alpha 2442 equivalent
Combination Signal and Coil Drive Cable (18 AWG)(1)
Units
ft
m
ft
m
ft
m
Part Number
08712-0061-0001
08712-0061-0003
08712-0060-0001
08712-0060-0003
08712-0752-0001
08712-0752-0003
(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).
Rosemount recommends using the combination signal and coil drive for N5,
E5 approved flowtubes for optimum performance.
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
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Rosemount 8712D
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
Cable Shield
2-14
NOTE
Dimensions are in
inches (millimeters).
8705-0041A
1.00
(26)
Reference Manual
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March 2004
Flowtube to Remote
Mount Transmitter
Connections
Rosemount 8712D
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.
8712_05A
Figure 2-13. Wiring Diagram
Rosemount 8712D Transmitter
Rosemount 8705/8707/8711/8721 Flowtubes
1
1
2
2
17
17
18
18
19
19
2-15
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Reference Manual
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March 2004
Section 3
Rosemount 8712D
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
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
www.rosemount.com
Set-up Parameters
Page
Process Variables
Diagnostics and Service
Basic Setup
Detailed Setup
Review Variables
Miscellaneous Functions
Multidrop Communications
page 3-6
page 5-6
page 3-6
page 3-9
page 3-17
page 3-17
page 3-22
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March 2004
Rosemount 8712D
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
3-2
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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March 2004
Rosemount 8712D
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
FLOW
RATE
TOTALIZE
TOTALIZER
START
STOP
TUBE CAL
NO.
ANALOG
OUTPUT
RANGE
READ
DATA
ENTRY
SHIFT
RESET
TUBE
SIZE
UNITS
AUX.
FUNCTION
PULSE
OUTPUT
SCALING
DAMPING
XMTR
INFO
INCR.
ENTER
TRANSMITTER PARAMETERS
Data Entry
The LOI keypad does not have numerical keys. Numerical data is entered by
the following procedure.
3-3
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March 2004
Rosemount 8712D
Selecting Options
LOI EXAMPLES
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 ,&, +, -, *, /, $, @,%, 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.
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.
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.
Table Values:
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.
After a moment, the LCD will display the new analog output range.
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March 2004
Rosemount 8712D
Table 3-2. LOI Data Entry Keys and Functions
Data Entry Keys
Shift
Increment
Enter
Display Control Keys
Flow Rate
Totalize
Start/Stop
Read/Reset
Transmitter Parameters
Keys
Tube Calibration Number
Tube Size
Units
Auxiliary Functions
Analog Output Range
Pulse Output Scaling
Damping
Transmitter Information
Empty Pipe Tuning
Function Performed
• 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
Stores the displayed value previously selected with the SHIFT and INCR. keys
Function Performed
Displays the user-selected parameters for flow indication
Displays the present totalized output of the transmitter, and activates the Totalizer group of keys
The choices, Forward and Reverse totals or Net and Gross totals, are selected in Auxiliary Functions
Starts the totalizing display if it is stopped, and stops the display if it is running
Resets the net totalizing display to zero if it is stopped, and halts the display if the display is running
Function Performed
Identifies the calibration number when using Rosemount flowtubes, or other manufacturers’ flowtubes
calibrated at the Rosemount factory
Specifies the flowtube size and identifies the corresponding maximum flow (0.1 - through 80-inch line sizes)
Specifies the desired units:
Gal/Min Liters/Min
ImpGal/Min CuMeter/Hr
Ft/Sec Meters/Sec
Special (user defined)
Function
Options
Operating Mode
Normal or Filter
Coil Pulse Mode
5 or 37 Hz
Flow rate Display
Flow–% Span, Flow–Totalize, %Span–Totalize
Totalizer Display
Forward–Reverse or Net–Gross
Signal Processing
On/Off
Special Units
Volume units, base volume units, conversion, timebase, rate units
Aux. Output Control
Reverse Flow/Zero Flow
Reverse Flow Enable
On/Off
Universal Auto Trim
In-process Flowtube Calibration
Low Flow Cutoff
0.01 ft/s to 1 ft/s
Pulse Width
Pulse Width
Analog Output Zero
4 mA Value
Analog Output Test
Analog Output Loop Test
Pulse Output Test
Pulse Output Loop Test
Transmitter Test
Test the Transmitter
4–20 mA Output Trim
Adjust the 4–20 mA Output
Auto Zero
Zero Flow Tube for 37 Hz Coil Drive Operation
Electronics Trim
Transmitter Calibration
Sets the desired 20 mA point – must set the tube size first
Sets one pulse to a selectable number of volume units – must set the tube size first
Sets response time (single pole time constant), in seconds, to a step change in flow rate
Allows you to view and change useful information about the transmitter and flowtube
Allowable range 3.0 - 2000.0
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March 2004
Rosemount 8712D
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:
PROCESS VARIABLES
Fast Keys
1, 1
•
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)
The process variables measure flow in several ways that reflect your needs
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
3-6
Fast Keys
1, 3, 1
LOI Key
XMTR INFO
Tag is the quickest and shortest way of identifying and distinguishing between
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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March 2004
Flow Rate Units
Fast Keys
1, 3, 2, 1
LOI Key
Units
Rosemount 8712D
The flow rate units variable specifies the format in which the flow rate will be
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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March 2004
Rosemount 8712D
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
Fast Keys
1, 3, 5
LOI Key
Tube Size
The line size (tube size) must be set to match the actual flowtube connected
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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March 2004
Calibration Number
Fast Keys
1, 3, 6
LOI Key
Tube Cal No.
Rosemount 8712D
The tube calibration number is a 16-digit number used to identify flowtubes
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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March 2004
Rosemount 8712D
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:
10,000 gal/min
---------------------------------------------------------------------------- = 16666.7 Hz
( 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
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 1/2 the period of the pulse) the
transmitter will automatically default to a pulse width of 50% duty cycle.
Figure 3-2. Pulse Output
OPEN
CLOSED
Pulse
Width
Period
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March 2004
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)
100 ms
200 ms
0.5 ms
1.0 ms
MAXIMUM FREQUENCY
1 Cycle
-------------------- = 5 Hz
200 mS
1 Cycle
-------------------- = 1000 Hz
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.
Flow Rate (gpm)
Pulse Scaling = ----------------------------------------------------------(60 s/min)(Frequency)
10,000 gpm
= ---------------------------------------------------------(60 s/min)(10,000 Hz)
Pulse Scaling = 0.0167 gal/pulse
1 Pulse = 0.0167 gallon
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.
Flow Rate (gpm)
Frequency = ---------------------------------------------------------------------------------------------(60 s/min)(Pulse Scaling gal/pulse)
350 gpm
= ----------------------------------------------------------(60 s/min)(1 gal/pulse)
= 5.833 Hz
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Rosemount 8712D
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.
Flow Rate (gpm)
Pulse Scaling = ----------------------------------------------------------(60 s/min)(Frequency)
3000 gpm
= -------------------------------------------------------(60 s/min)(10,000Hz)
= 0.005 gal/pulse
1 Pulse = 0.005 gallon
Special Units
Fast Keys
1, 3, 2, 2
LOI Key
Aux. Function
The Rosemount 8712D provides a selection of standard units configurations
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.
User-Defined Volume
Unit
Fast Keys
1, 3, 2, 2, 1
LOI Key
Aux. Function
Base Volume Unit
Fast Keys
1, 3, 2, 2, 2
LOI Key
Aux. Function
Conversion Number
Fast Keys
1, 3, 2, 2, 3
LOI Key
Aux. Function
Base Time Unit
3-12
Fast Keys
1, 3, 2, 2, 4
LOI Key
Aux. Function
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 is the unit from which the conversion is being made. Set this
variable to the appropriate option.
The special units conversion number is used to convert base units to special
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 provides the time unit from which to calculate the special units.
For example, if your special units is a volume per minute, select minutes.
Reference Manual
00809-0100-4661, Rev AA
March 2004
User-Defined Flow Unit
Fast Keys
1, 3, 2, 2, 5
LOI Key
Aux. Function
Rosemount 8712D
User-defined flow unit is a format variable that provides a record of the units to
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
Fast Keys
1, 4, 3, 3
LOI Key
Aux. Function
The auxiliary output contacts (terminals 16 and 20) are software- selectable to
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
Fast Keys
1, 4, 3, 4
LOI Key
Aux. Function
Empty Pipe
On / Off (LOI Command)
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.
On / Off (LOI Command)
Fast Keys
1, 4, 1, 7
LOI Key
Aux. Function
Empty Pipe Value
Fast Keys
Not Accessible
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.
The read only Empty Pipe Value represents the level of the empty pipe signal.
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.
3-13
Reference Manual
Rosemount 8712D
Empty Pipe Trigger Level
Fast Keys
Not Accessible
LOI Key
Aux. Function
00809-0100-4661, Rev AA
March 2004
The Empty Pipe Trigger Level can be turned to actual process conditions. The
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
Fast Keys
Not Accessible
LOI Key
Aux. Function
Totalizer
Fast Keys
1, 1, 4
LOI Key
Totalizer
Measure Gross Total
Fast Keys
1, 1, 4, 1
LOI Key
Totalizer
Start Totalizer
Totalizer tallies the total amount of process fluid that has passed through the
flowmeter since the totalizer was last reset and enables you to change the
settings of the totalizer.
Measure gross total provides the output reading of the totalizer. This value is
the amount of process fluid that has passed through the flowmeter since the
totalizer was last reset
Start totalizer starts the totalizer counting from its current value.
Fast Keys
1, 1, 4, 4
LOI Key
Totalizer
Stop Totalizer
Fast Keys
1, 1, 4, 5
LOI Key
Totalizer
Reset Totalizer
3-14
The Empty Pipe Counts sets the number of consecutive occurrences before
the Empty Pipe output is turned ON or OFF. The count range is 5-50, with
factory default set at 5.
Fast Keys
1, 1, 4, 6
LOI Key
Totalizer
Stop totalizer interrupts the totalizer count until it is restarted again. This
feature is often used during pipe cleaning or other maintenance operations.
Reset totalizer resets the net totalizer value to zero. The totalizer must be
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.
Reference Manual
00809-0100-4661, Rev AA
March 2004
Alarm Level
Fast Keys
1, 4, 3, 6
LOI Key
Aux. Function
Rosemount 8712D
The alarm level allows you to drive the transmitter to preset values if an alarm
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
High
3.9 mA
20.8 mA
≤3.75 mA
≥22.6 mA
Table 3-4. NAMUR-Compliant Alarm and Saturation Values
Low Flow Cutoff
Fast Keys
1, 4, 4, 1
LOI Key
Aux. Function
Coil Drive Frequency
Fast Keys
1, 4, 1, 3
LOI Key
Totalizer
Level
4-20 mA Saturation
4-20 mA Alarm
Low
High
3.8 mA
20.5 mA
≤3.5 mA
≥22.6 mA
Low flow cutoff allows you to specify the flow rate, between 0.01 and 1.0 feet
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 allows pulse-rate selection of the flowtube coils.
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
LOI Key
Normal Mode (LOI Command Only)
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.
3-15
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Signal Processing
Control
On/Off
Fast Keys
1, 4, 4
LOI Key
Aux. Function
Number of Samples
Fast Keys
1, 4, 4, 5
LOI Key
Aux. Function
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.
0 to 125 Samples
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 1/10 second
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
Fast Keys
1, 4, 4, 6
LOI Key
Aux. Function
0 to 100 Percent
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.
3-16
Reference Manual
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March 2004
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
to ensure accuracy and compatibility with your particular application of the
flowmeter.
Fast Keys
1, 5
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
identification and other purposes. It provides 32 characters of information and
is stored with the other configuration data.
Fast Keys
1, 4, 5, 4
LOI Key
XMTR INFO
Date
Fast Keys
1, 4, 5, 5
LOI Key
XMTR INFO
Flowtube Tag
Fast Keys
1, 4, 5, 8
LOI Key
XMTR INFO
Flowtube Serial Number
Fast Keys
1, 4, 5, 7
LOI Key
XMTR INFO
Transmitter Tag
Fast Keys
1, 4, 5, 2
LOI Key
XMTR INFO
Liner Material
Fast Keys
N/A
LOI Key
XMTR INFO
Date is a user-defined variable that provides a place to save the date of the
last revision of configuration information.
Flowtube tag is the quickest and shortest way of identifying and distinguishing
between flowtubes. Transmitters can be tagged according to the requirements
of your application. The tag may be up to eight characters long.
The flowtube serial number is stored in the transmitter configuration for future
reference. The number provides easy identification if the flowtube needs
servicing or for other purposes.
Transmitter Tag is the quickest and shortest way of identifying and
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 enables you to select the liner material for the attached
flowtube. This variable only needs to be changed if you have replaced your
flowtube.
Liner Materials
•
Teflon® (PTFE)
•
Tefzel® (ETFE)
•
Polyurethane
•
Natural Rubber
•
Neoprene
•
Ryton®
•
Other
3-17
Reference Manual
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March 2004
Rosemount 8712D
Electrode Type
Fast Keys
N/A
LOI Key
XMTR INFO
Electrode Type enables you to select the electrode type for your magnetic
transmitter system. This variable only needs to be changed if you have
replaced electrodes or if you have replaced your flowtube.
Electrode Types
Electrode Material
Fast Keys
N/A
LOI Key
XMTR INFO
•
Standard
•
Std & Ground
•
Bullet
•
Other
Electrode Material enables you to select the electrode material for your
magnetic transmitter system. This variable only needs to be changed if you
have replaced electrodes or if you have replaced your flowtube.
Electrode Materials
Flange Material
Fast Keys
N/A
LOI Key
XMTR INFO
Flange Type
3-18
Fast Keys
N/A
LOI Key
XMTR INFO
•
316L SST
•
Hastelloy® C-276
•
Tantalum
•
Plat–10% Ir
•
Titanium
•
Ryton
•
Alloy 20
•
Other
Flange Material enables you to select the flange material for your magnetic
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 enables you to select the flange type for your magnetic
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
D/A Trim and
(4 20 mA Output Trim)
Fast Keys
1, 2, 4, 1
LOI Key
Aux. Function
Rosemount 8712D
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
Fast Keys
1, 2, 1, 2
LOI Key
Aux. Function
Scaled D/A Trim
Fast Keys
1, 2, 4, 2
LOI Key
N/A
The Simulate Alarm function forces the transmitter analog output into an
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 enables you to calibrate the flowmeter analog output using 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.
3-19
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00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Electronics Trim
Fast Keys
1, 2, 4, 3
LOI Key
Aux. Function
Electronics trim is the function by which the factory calibrates the transmitter.
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:
3-20
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.
Reference Manual
00809-0100-4661, Rev AA
March 2004
Auto Zero Trim
Fast Keys
1, 2, 4, 4
LOI Key
Aux. Function
Rosemount 8712D
The auto zero trim function initializes the transmitter for use with the 37 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 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
Fast Keys
1, 2, 4, 5
LOI Key
Aux. Function
The universal auto trim function enables the Rosemount 8712D to calibrate
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.
3-21
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00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
MULTIDROP
COMMUNICATIONS
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.
Figure 3-3. Typical
Multidrop Network
3051-0087A, 8712-8712B01B
HART
(Bell 202)
Modem
RS-232-C
4–20 mA
Power
Supply
Rosemount 8712D Magnetic Flowmeter
Transmitters
HANDHELD
COMMUNICATOR
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.
3-22
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March 2004
Rosemount 8712D
Figure 3-4. Handheld
Communicator Menu Tree for
Rosemount 8712D
1 PROCESS
VARIABLES
2 DIAGNOSTICS
AND
SERVICE
1 FLOW RATE
2 PERCENT OF RANGE
3 ANALOG OUTPUT
4 TOTALIZER
5 PULSE OUTPUT
1 MEASURE GROSS TOTAL
2 MEASURE NET TOTAL
3 MEASURE REVERSE TOTAL
4 START TOTALIZER
5 STOP TOTALIZER
6 RESET TOTALIZER
1 SELF TEST/STATUS
1 VIEW STATUS
2 SELF TEST
2 LOOP TEST
1 4 MA
2 20 MA
3 SIMULATE
4 OTHER
5 END
3 PULSE OUTPUT TEST
4 CALIBRATION
On-line
Menu
1 DEVICE
SETUP
2 PV
3 PV AO
4 PV LRV
5 PV URV
3 BASIC
SETUP
1 TAG
2 PV UNITS
3 URV
4 LRV
5 LINE SIZE
6 CALIBRATION NUMBER
7 DAMPING
1 D/A TRIM
2 SCALED D/A TRIM
3 DIGITAL TRIM
4 AUTO ZERO TRIM
5 UNIVERSAL TRIM
1 FLOW RATE UNITS
2 SPECIAL UNITS
1 CHARACTERIZE
METER
1 LINE SIZE
2 CALIBRATION NUMBER
3 COIL DRIVE FREQUENCY
4 UPPER SENSOR LIMIT
5 LOWER SENSOR LIMIT
6 PV MIN SPAN
7 EMPTY PIPE ON/OFF
2 PV UNITS
1 FLOW RATE UNITS
2 SPECIAL UNITS
1 ANALOG OUTPUT
4 DETAILED
SETUP
3 CONFIGURE
OUTPUTS
2 PULSE OUTPUT
CONFIGURATION
3 AUXILIARY
OUTPUT
4 REVERSE FLOW
4 SIGNAL
PROCESSING
5 REVIEW
1 USER DEFINED VOL UNIT
2 BASE VOL UNIT
3 CONVERSION NUMBER
4 BASE TIME UNIT
5 USER DEFINED FLOW UNIT
1 PULSE OUTPUT SCALING
2 PULSE WIDTH
3 PULSE OUTPUT TEST
1 REVERSE FLOW ENABLE
2 ZERO FLOW ENABLE
5 TOTALIZER
6 ALARM LEVEL
7 HART OUTPUT
5 DEVICE
INFORMATION
1 USER DEFINED VOL UNIT
2 BASE VOL UNIT
3 CONVERSION NUMBER
4 BASE TIME UNIT
5 USER DEFINED FLOW UNIT
1 LOW FLOW CUTOFF
2 DAMPING
3 COIL DRIVE
FREQUENCY
4 CONTROL STATUS
5 NUMBER OF
SAMPLES
6 MAX % LIMIT
7 TIME LIMIT
1 POLL
ADDRESS
2 NUMBER
PREAMBLES
3 BURST
MODE
CONTROL
4 BURST
OPTION
1 MANUFACTURER
2 TAG
3 DESCRIPTOR
4 MESSAGE
5 DATE
6 DEVICE ID
7 FLOWTUBE S/N
8 FLOWTUBE TAG
9 WRITE PROTECT
– REV NUMBER
– CONSTRUCTION MATERIAL
1 URV
2 LRV
3 AOI
4 ALARM TYPE
5 LOOP TEST
6 D/A TRIM
7 SCALED D/A
TRIM
1 ROSEMOUNT
2 NAMUR
1 MEASURE GROSS
TOTAL
2 MEASURE NET TOTAL
3 MEASURE REVERSE
TOTAL
4 START TOTALIZER
5 STOP TOTALIZER
6 RESET TOTALIZER
1 UNIVERSAL REV
2 TRANSMITTER REV
3 SOFTWARE REV
1 FLANGE TYPE
2 FLANGE MATERIAL
3 ELECTRODE TYPE
4 ELECTRODE
MATERIAL
5 LINER MATERIAL
3-23
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March 2004
Rosemount 8712D
Table 3-5. Handheld Fast Keys
(275 / 375 Handheld
Communicator) and LOI Keys
3-24
Function
275 / 375 Fast Keys LOI Key
Process Variables
DIAGNOSTICS AND SERVICE
Analog Output Test
Pulse Output Test
Self Test
D/A Trim and
4-20 mA Output Trim
Scaled D/A Trim
Electronics Trim
Auto Zero Trim
Universal Auto Trim
BASIC SETUP
Tag
Flow Rate Units
URV (Upper Range Value)
LRV (Lower Range Value)
Line Size
Calibration Number
Damping
DETAILED SETUP
Pulse Output Scaling
Pulse Width
Special Units
User-Defined Volume Unit
Base Volume Unit
Conversion Number
Base Tim Unit
User-Defined Flow Unit
Auxiliary Output
Totalizer
Measure Gross Total
Start Totalizer
Stop Totalizer
Reset Totalizer
Low Flow Cutoff
Coil Dive Frequency
Signal Process Control Status
Empty Pipe
Signal Processing Control
Number of Samples
Maximum Percent Limit
Time Limit
REVIEW VARIABLES
Review
MISCELLANEOUS FUNCTIONS
Message
Date
Flowtube Tag
Flowtube Serial Number
1, 1
1, 2, 2
1, 2, 3
1, 2, 1, 2
1, 2, 4, 1
Aux. function
Aux. Function
Aux. Function
Aux. Function
1, 2, 4, 2
1, 2, 4, 3
1, 2, 4, 4
1, 2, 4, 5
Aux. Function
Aux. Function
Aux. Function
1, 3, 1
1, 3, 2, 1
1, 3, 3, 2
1, 3, 4, 1
1, 3, 5
1, 3, 6
1, 3, 7
XMTR Info
Units
Analog Output Range
Aux. Function
Tube Size
Tube Cal No.
Damping
1, 4, 3, 2, 1
1, 4, 3, 2, 2
1, 3, 2, 2
1, 3, 2, 2, 1
1, 3, 2, 2, 2
1, 3, 2, 2, 3
1, 3, 2, 2, 4
1, 3, 2, 2, 5
1, 4, 3, 3
1, 1, 4
1, 1, 4, 1
1, 1, 4, 4
1, 1, 4, 5
1, 1, 4, 6
1, 4, 4, 1
1, 4, 1, 3
1, 4, 4, 4
1, 4, 1, 7
1, 4, 4
1, 4, 4, 5
1, 4, 4, 6
1, 4, 4, 7
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Totalizer
Totalizer
Totalizer
Totalizer
Totalizer
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
Aux. Function
1, 5
1, 4, 5, 4
1, 4, 5, 5
1, 4, 5, 8
1, 4, 5, 7
XMTR Info
XMTR Info
XMTR Info
XMTR Info
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
CONNECTIONS AND
HARDWARE
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.
Figure 3-5. Rear Connection
Panel with Optional NiCad
Recharger Jack
Loop Connection Ports
Optional NiCad
Recharger Jack
275 / 375 Handheld Communicator Ports
RL≥250
5
1
6
2
7
8
16
9
17
10
18
19
20
Figure 3-6. Connecting the
Handheld Communicator to a
Transmitter Loop
275-008AB
Serial Port
Fuse
Current
Meter
8712-8712U01B
Power
Supply
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
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March 2004
Rosemount 8712D
Figure 3-7. Connecting the
Handheld Communicator
with the Optional Load Resistor
9
5
1
6
8712-8712Q11B, 0275B01A
2
7
8
16
Rosemount
8712U
17
10
18
19
20
NOTE
Loop must be broken to insert
the optional 250 ohm resistor.
Fuse
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
37501AA
Action Keys
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.
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 HELP label may appear above the F1 key. In menus providing
access to the Home Menu, the HOME 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.
Alphanumeric and
Shift Keys
The Alphanumeric keys perform two functions: the fast selection of menu
options and data entry.
275-0383A
Figure 3-9. Handheld
Communicator Alphanumeric
and Shift Keys
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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Rosemount 8712D
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
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:
3-28
•
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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March 2004
Rosemount 8712D
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.
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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Rosemount 8712D
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
for all device types or only for the type of device that is connected.
The connected device does not support this function.
Either a device sends back a response indicating that the message it
received was unintelligible or the HC cannot understand the response
from the device.
The configuration stored in memory is incompatible with the device to
which a transfer has been requested.
The connected device is busy performing another task.
Device fails to respond to a command
Device is in write-protect mode Data can not be written
Device is in write-protect mode – press YES to turn the HC off and lose
the unsent data.
Asks whether the value of the variable should be displayed adjacent to
its label on the hot key menu if the item being added to the hot key menu
is a variable.
Prompts user to press SEND softkey to initiate a memory to device
transfer.
Indicates that the field width for the current arithmetic variable exceeds
the device- specified description edit format
Indicates that the precision for the current arithmetic variable exceeds
the device- specified description edit form
Asked after displaying device status – softkey answer determines
whether next 50 occurrences of device status will be ignored or
displayed
An invalid character for the variable type was entered.
The day portion of the date is invalid.
The month portion of the date is invalid.
The year portion of the date is invalid.
The exponent of a scientific notation floating point variable is
incomplete.
The value entered is not complete for the variable type.
Polling for multidropped devices at addresses 1–15
Asks whether the user should be allowed to edit the variable from the
hot key menu if the item being added to the hot key menu is a variable
There is no configuration saved in memory available to re-configure
off-line or transfer to a device.
Poll of address zero fails to find a device, or poll of all addresses fails to
find a device if auto-poll is enabled
There is no menu named “hot key” defined in the device description for
this device.
There are no device descriptions available to be used to configure a
device off-line.
There are no device descriptions available to simulate a device.
There is no menu named “upload_variables” defined in the device
description for this device – this menu is required for off-line
configuration.
Command Not Implemented
Communication Error
Configuration memory not compatible with connected device
Device Busy
Device Disconnected
Device write protected
Device write protected – do you still want to shut off?
Display value of variable on hot key menu?
Download data from configuration memory to device
Exceed field width
Exceed precision
Ignore next 50 occurrences of status?
Illegal character
Illegal date
Illegal month
Illegal year
Incomplete exponent
Incomplete field
Looking for a device
Mark as read only variable on hot key menu?
No device configuration in configuration memory
No Device Found
No hot key menu available for this device
No off-line devices available
No simulation devices available
No UPLOAD_VARIABLES in ddl for this device
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March 2004
Rosemount 8712D
Table 3-6. Handheld Communicator Diagnostic Messages
Message
Description
No Valid Items
OFF KEY DISABLED
The selected menu or edit display contains no valid items.
Appears when the user attempts to turn the HC off before sending
modified data or before completing a method
On-line device disconnected with unsent data – RETRY or OK to
There is unsent data for a previously connected device. Press RETRY
lose data
to send data, or press OK to disconnect and lose unsent data.
Out of memory for hot key configuration – delete unnecessary
There is no more memory available to store additional hot key items.
items
Unnecessary items should be deleted to make space available.
Overwrite existing configuration memory
Requests permission to overwrite existing configuration either by a
device-to-memory transfer or by an off-line configuration; user answers
using the softkeys
Press OK...
Press the OK softkey – this message usually appears after an error
message from the application or as a result of hart communications.
Restore device value?
The edited value that was sent to a device was not properly
implemented. Restoring the device value returns the variable to its
original value.
Save data from device to configuration memory
Prompts user to press SAVE softkey to initiate a device-to-memory
transfer
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.
There are write-only variables which have not been set by the user.
Please edit them.
These variables should be set or invalid values may be sent to the
device.
There is unsent data. Send it before shutting off?
Press YES to send unsent data and turn the HC off. Press NO to turn
the HC off and lose the unsent data.
Too few data bytes received
Command returns fewer data bytes than expected as determined by the
device description
Transmitter Fault
Device returns a command response indicating a fault with the
connected device
Units for <variable label> has changed – unit must be sent before The engineering units for this variable have been edited. Send
editing, or invalid data will be sent
engineering units to the device before editing this variable.
Unsent data to on-line device – SEND or LOSE data
There is unsent data for a previously connected device which must be
sent or thrown away before connecting to another device.
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
and size of variable or not within the min/max specified by the device.
<message> occurred reading/writing <variable label>
Either a read/write command indicates too few data bytes received,
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.
<variable label> has an unknown value – unit must be sent before A variable related to this variable has been edited. Send related variable
editing, or invalid data will be sent
to the device before editing this variable.
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Reference Manual
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March 2004
Section 4
Rosemount 8712D
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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.
4-2
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March 2004
FLOWTUBE HANDLING
Rosemount 8712D
Handle all parts carefully to prevent damage. Whenever possible, transport
the system to the installation site in the original shipping containers.
Teflon®-lined flowtubes are shipped with end covers that protect it from both
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.
8732-0281B02AB, C02AB
Figure 4-1. Rosemount 8705
Flowtube Support for Handling
½- through 4-Inch
Flowtubes
6-Inch and Larger
Flowtubes
See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.
4-3
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March 2004
Rosemount 8712D
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
2 Pipe Diameters
8732-0281G02A
5 Pipe Diameters
FLOW
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.
Figure 4-3. Vertical Flowtube
Orientation
FLOW
A
FLOW
4-4
8735-0005A01AB, 0005A01BB
B
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March 2004
Rosemount 8712D
Figure 4-4. Incline or Decline
Orientation
B
FLOW
8732-0005A01EB, 0005A01FB
A
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.
Figure 4-5. Horizontal Flowtube
Orientation
8732-0005A01C
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.
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March 2004
Rosemount 8712D
45° Electrode Plane
45° Electrode Plane
Flow Direction
8711-8711-E01AB, 8711-8711-F01A
Figure 4-6. Rosemount 8711
Mounting Position
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).
FLOW
4-6
8712-0281H02FD
Figure 4-7. Flow Direction
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March 2004
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.
8705-0040E
Figure 4-8. Gasket Placement
Gasket (Supplied by user)
8705-0038D
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.
See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.
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Rosemount 8712D
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
Line Size
Class 150
(pound-feet)
Class 300
(pound-feet)
/2-inch (15 mm)
1 inch (25 mm)
11/2 inch (40 mm)
2 inch (50 mm)
3 inch (80 mm)
4 inch (100 mm)
6 inch (150mm)
8 inch (200 mm)
10 inch (250 mm)
12 inch (300 mm)
14 inch (350 mm)
16 inch (400 mm)
18 inch (450 mm)
20 inch (500 mm)
24 inch (600 mm)
30 inch (750 mm)
36 inch (900 mm)
8
8
13
19
34
26
45
60
55
65
85
85
120
110
165
195
280
8
12
25
17
35
50
50
82
80
125
110
160
170
175
280
415
575
Size Code
005
010
015
020
030
040
060
080
100
120
140
160
180
200
240
300
360
1
See ”Safety Messages” on pages 4-1 and 4-2 for complete warning information.
4-8
Polyurethane liner
Class 150
Class 300
(pound-feet) (pound-feet)
—
—
7
14
23
17
30
42
40
55
70
65
95
90
140
165
245
—
—
18
11
23
32
37
55
70
105
95
140
150
150
250
375
525
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Rosemount 8712D
Table 4-2. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705
Teflon/Tefzel liner
PN10
Size
Code
005
010
015
020
030
040
060
080
100
120
140
160
180
200
240
Line Size
PN 16
PN 25
PN 40
(Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)
1
/2-inch (15 mm)
1 inch (25 mm)
11/2 inch (40 mm)
2 inch (50 mm)
3 inch (80 mm)
4 inch (100 mm)
6 inch (150mm)
8 inch (200 mm)
10 inch (250 mm)
12 inch (300 mm)
14 inch (350 mm)
16 inch (400 mm)
18 inch (450 mm)
20 inch (500 mm)
24 inch (600 mm)
7
13
24
25
14
17
23
35
31
43
42
65
56
66
104
3209
6983
9983
10420
5935
7038
7522
11516
10406
14439
13927
18189
15431
18342
25754
7
13
24
25
14
17
32
35
59
82
80
117
99
131
202
3809
6983
9983
10420
5935
7038
10587
11694
16506
22903
22091
28851
24477
29094
40850
7
13
24
25
18
30
60
66
105
109
156
224
—
225
345
3809
6983
9983
10420
7612
9944
16571
18304
25835
26886
34578
45158
—
45538
63940
7
13
24
25
18
30
60
66
105
109
156
224
—
225
345
4173
8816
13010
14457
12264
16021
26698
36263
48041
51614
73825
99501
67953
73367
103014
Figure 4-10. Flange Bolt
Torquing Sequence
4-Bolt
8-Bolt
Torque the flange bolts
in increments according to
the above numerical sequence.
12-Bolt
14-Bolt
8701-0870G02A
20-Bolt
4-9
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 4-3. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705
Polyurethane Liner
PN 10
Size
Code
005
010
015
020
030
040
060
080
100
120
140
160
200
240
Line Size
PN 16
PN 25
PN 40
(Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)
1
/2-inch (15 mm)
1 inch (25 mm)
11/2 inch (40 mm)
2 inch (50 mm)
3 inch (80 mm)
4 inch (100 mm)
6 inch (150mm)
8 inch (200 mm)
10 inch (250 mm)
12 inch (300 mm)
14 inch (350 mm)
16 inch (400 mm)
20 inch (500 mm)
24 inch (600 mm)
1
2
5
6
5
7
16
27
26
36
35
55
58
92
521
1191
1960
2535
2246
3033
5311
8971
8637
12117
11693
15393
15989
22699
1
3
7
10
9
12
25
28
49
69
67
99
114
178
826
1890
3109
4021
3563
4812
8425
9487
13700
19220
18547
24417
25361
36006
2
5
12
15
13
23
47
53
87
91
131
189
197
304
1293
2958
4867
6294
5577
7531
13186
14849
21443
22563
29030
38218
39696
56357
6
10
20
26
24
35
75
100
155
165
235
335
375
615
3333
5555
8332
10831
19998
11665
20829
24687
34547
36660
47466
62026
64091
91094
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
4-10
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.
Reference Manual
00809-0100-4661, Rev AA
March 2004
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
CS, ASTM A193, Grade B7, threaded mounting studs
11/2 – 8 inch (40 – 200 mm)
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
Flange Bolts
FLOW
8732-0002A1A
Customer-supplied
Gasket
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.
4-11
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 4-5. Flange bolt Torque Specifications of Rosemount 8711 Flowtubes
Size Code
Line Size
Pound-feet
Newton-meter
15F
30F
005
010
015
020
030
040
060
080
0.15 inch (4 mm)
0.30 inch (8 mm)
1
/2-inch (15 mm)
1 inch (25 mm)
11/2 inch (40 mm)
2 inch (50 mm)
3 inch (80 mm)
4 inch (100 mm)
6 inch (150 mm)
8 inch (200 mm)
5
5
5
10
15
25
40
30
50
70
6.8
6.8
6.8
13.6
20.5
34.1
54.6
40.1
68.2
81.9
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
If ordered manufacturer
supplied clamp and gasket.
8721_A_06.EPS
User supplied gasket
GROUNDING
4-12
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.
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
Conductive Lined Pipe
Non-Conductive Pipe
See Figure 4-13
Insufficient Grounding
Insufficient Grounding
Not Required
See Figure 4-14
See Figure 4-15
Not Required
See Figure 4-13
See Figure 4-16
See Figure 4-14
See Figure 4-14
See Figure 4-15
Figure 4-13. No Grounding
Options or Grounding Electrode
in Lined Pipe
8705-0040C
Earth
Ground
4-13
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Figure 4-14. Grounding with
Grounding Rings or Lining
Protectors
8705-038C
Earth
Ground
Grounding Rings or
Lining Protectors
Figure 4-15. Grounding with
Grounding Rings or Lining
Protectors
Grounding Rings
4-14
8711-0360A01B
Earth
Ground
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Figure 4-16. Grounding with
Grounding Electrodes
8711-0360A01A
Earth
Ground
4-15
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
PROCESS LEAK
PROTECTION
(OPTIONAL)
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.
Standard Housing
Configuration
•
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)
¾–14 NPT Conduit
Connection
8705-1002A05D
(no relief valve)
4-16
Reference Manual
00809-0100-4661, Rev AA
March 2004
Relief Valves
Figure 4-18. Coil-Housing
Configuration — Standard
Welded Housing With Relief
Valve (Option Code W1)
Rosemount 8712D
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).
Optional:
Use drain port to
plumb to a safe area
(Supplied by user)
¾–14 NPT Conduit
Connection
8705-0021A05B
¼'' NPT – 5 psi
Pressure Relief Valve
Process Leak
Containment
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Figure 4-19. Housing
Configuration — Sealed
Electrode Compartment (Option
Code W3)
Fused Glass Seal
O-Ring Seal
1
/2 - 27 NPT
Grounding Electrode Port
Optional:
Use drain port to
plumb to a safe area
(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).
4-18
8705-0007ADGB
Sealed Electrode Compartment
Reference Manual
00809-0100-4661, Rev AA
March 2004
Section 5
Rosemount 8712D
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.
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
“Empty Pipe”
“Coil Open Circuit”
Potential Cause
Empty Pipe
Wiring Error
Electrode Error
Conductivity less than 5 microhms
per cm
Improper wiring
Other manufacturer’s flowtube
Circuit Board Failure
Verify the transmitter is not a
Rosemount 8712H
Coil Circuit OPEN Fuse
“Auto Zero Failure”
“Auto-Trim Failure”
“Electronics Failure”
“Reverse Flow”
Flow is not set to zero
Unshielded cable in use
Moisture problems
No flow in pipe while performing
Universal Auto Trim
Wiring error
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
Flowtube failure
Electronics self check failure
Electrode or coil wires reverse
Flow is reverse
Flowtube installed backwards
“PZR Activated”
(Positive Zero Return)
External voltage applied to
terminals 9 and 10
“Pulse Out of Range”
The transmitter is trying to
generate a frequency greater than
11,000 Hz
Flow rate is greater than analog
output Range
Flow rate is greater than 43 ft/sec
Improper wiring
“Analog Out of Range”
“Flowrate > 43 ft/sec”
5-2
Corrective Action
None - message will clear when pipe is full
Check that wiring matches appropriate wiring diagrams - see Appendix D:
Wiring Diagrams
Perform flowtube tests C and D (see Table 5-4 on page 5-8)
Increase Conductivity to less or equal than 5 microhms per cm
Check coil drive wiring and flowtube coils
Perform flowtube test A - Flowtube Coil
Change coil current to 75 mA
Replace Rosemount 8712D Electronics
Replace Rosemount 8712H with Rosemount 8712C/U/H/D
Return to factory for fuse replacement
Force flow to zero, perform autozero
Change wire to shielded cable
See moisture problems in “Accuracy Section”
Establish a known flow in tube, and perform Universal Auto-Trim calibration
Check that wiring matches appropriate wiring diagrams - see Appendix D:
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
Correct tube size setting - See “Line Size” on page 3-8
Perform flowtube tests C and D (see Table 5-4 on page 5-8)
Replace Electronics
Verify wiring between flowtube and transmitter
Turn ON Reverse Flow Enable to read flow
Re-install flowtube correctly, or switch either the electrode wires (18 and 19)
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
Lower flow velocity, increase pipe diameter
Check coil drive wiring and flowtube coils
Perform flowtube test A - Flowtube Coil (see Table 5-4 on page 5-8)
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 5-1. Rosemount 8712D Diagnostic Messages
Symptom
“Digital Trim Failure”
(Cycle power to clear
messages, no changes
were made)
Potential Cause
The calibrator (8714B/C/D) is not
connected properly
Incorrect calibration number
entered into transmitter
Calibrator is not set to 30 FPS
Bad calibrator
Corrective Action
Review calibrator connections
Replace flowtube calibration number with 1000005010000001
Change calibrator setting to 30 FPS
Replace calibrator
Table 5-2. Basic Troubleshooting–Rosemount 8712D
Symptom
Output at 0 mA
Output at 4 mA
Potential Cause
No power to transmitter
Blown fuse
Electronics failure
Analog output improperly
configured
Open coil drive circuit
Transmitter in multidrop mode
Low Flow Cutoff set too high
PZR Activated
Flow is in reverse direction
Shorted coil
Empty pipe
Electronics failure
Output at 21.6 mA
Transmitter not ranged properly
Output at alarm level
Electronics failure
Pulse output at zero,
regardless of flow
Wiring error
PZR activated
No power to transmitter
Reverse flow
Electronics failure
Communication problems
with the Handheld
Communicator
Error Messages on LOI or
Handheld Communicator
4–20 mA output configuration
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
Corrective Action
Check power source and connections to the transmitter
Check the fuse and replace with an appropriately rated fuse, if necessary
Verify transmitter operation with an 8714 Field Calibrator or replace the
electronic board
Check the analog power switch
Check coil drive circuit connections at the flowtube and at the transmitter
Configure Poll Address to 0 to take transmitter out of multidrop mode
Configure Low Flow Cutoff to a lower setting or increase flow to a value
above the low flow cutoff
Open PZR switch at terminals 9 and 10 to deactivate the PZR
Enable Reverse Flow function
Coil check – perform flowtube test
Fill pipe
Verify transmitter operation with an 8714 Field Calibrator or replace the
electronic board
Reset the transmitter range values –
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
Cycle power by removing and installing the power fuse. If alarm is still
present, verify transmitter operation with an 8714 Field Calibrator or replace
the electronic board
Check pulse output wiring at terminals 5 and 6. Refer to wiring diagram for
your flowtube and pulse output
Remove signal at terminals 9 and 10 to deactivate the PZR.
Check pulse output wiring at terminals 5 and 6. Refer to wiring diagram for
your flowtube and pulse output
Enable Reverse Flow function
Verify transmitter operation with an 8714 Field Calibrator or replace the
electronic board
Check analog power switch (internal/external). The Handheld Communicator
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.
5-3
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
TRANSMITTER
TROUBLESHOOTING
Table 5-3. Advanced Troubleshooting–Rosemount 8712D
Symptom
Does not appear to be within
rated accuracy
Potential Cause
Transmitter, control system, or other
receiving device not configured
properly
Corrective Action
Check all configuration variables for the transmitter, flowtube,
communicator, and/or control system
Check these other transmitter settings:
•Flowtube calibration number
•Units
•Line size
Electrode Coating
Air in line
Moisture problem
Improper wiring
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
Flowtube failure–Shorted or open coil
Transmitter failure
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 process
Electrode coating
Air in line
Low conductivity fluids (below 10
micromhos/cm)
Perform a loop test to check the integrity of the circuit – see
“Analog Output Test” on page 5-6
Use bulletnose electrodes;
Downsize flowtube to increase flow rate above 3 ft/s;
Periodically clean flowtube
Move the flowtube to another location in the process line to
ensure that it is full under all conditions.
Perform the flowtube Tests A, B, C, and D
(see Table 5-4 on page 5-8)
If electrode shield and signal wires are switched, flow indication
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
Perform the flowtube Tests C and D
(see Table 5-4 on page 5-8)
Perform the flowtube Tests A and B
(see Table 5-4 on page 5-8)
Verify transmitter operation with an 8714 Field Calibrator or
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 replaceable electrodes in Rosemount 8705.
Use a smaller flowtube to increase flow rate above 3 ft/s.
Periodically clean flowtube.
Move the flowtube to another location in the process line to
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
Advanced Troubleshooting continued on next page
5-4
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 5-3. Advanced Troubleshooting–Rosemount 8712D
Symptom
Meter output is unstable
Potential Cause
Corrective Action
Medium to low conductivity fluids (10–
25 micromhos/cm) combined with
cable vibration or 60 Hz interference
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
Check the Technical Data Sheet, Magnetic Flowmeter Material
Selection Guide (document number 00816-0100-3033), for
chemical compatibility with electrode material.
Check ground wiring – see “Mount the Transmitter” on page 2-3
for wiring and grounding procedures
Move magnetic flowmeter (20–25 ft away is usually acceptable)
Check control loop tuning
Service valve
Electrode incompatibility
Improper grounding
High local magnetic or electric fields
Control loop improperly tuned
Sticky valve (look for periodic
oscillation of meter output)
Flowtube failure
Analog output loop problem
Reading does not appear to be
within rated accuracy
Transmitter, control system, or other
receiving device not configured
properly
Electrode coating
Air in line
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
Flowtube failure—shorted or open coil
Transmitter failure
Transmitter wired to correct flowtube
Perform the flowtube Tests A, B, C, and D
(See Table 5-4 on page 5-8)
Check that the 4 to 20 mA loop matches the digital value.
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
Use bulletnose electrodes in the Rosemount 8705 Flowtube.
Downsize the flowtube to increase the flow rate above 3 ft/s.
Periodically clean the flowtube
Move the flowtube to another location in the process line to
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
See Table 5-4 on page 5-8
See Table 5-4 on page 5-8
Replace the electronics board
Check wiring
Advanced Troubleshooting continued on next page
5-5
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 5-3. Advanced Troubleshooting–Rosemount 8712D
Symptom
Potential Cause
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
Air in the line
Meter output is unstable
Electrode incompatibility
Improper grounding
High local magnetic or electric fields
Sticky valve (Look for periodic
oscillation of meter output)
Corrective Action
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 bulletnose electrodes in the Rosemount 8705 Flowtube
Use a smaller flowtube to increase the flow rate above 3 ft/s
Periodically clean the flowtube
Move the flowtube to another location in the process line to
ensure that it is full under all conditions
Check the Magnetic Flowmeter Material Selection Guide
(00816-0100-3033) for chemical compatibility with electrode
material located on www.rosemount.com
See “Grounding” on page 4-12
Move the magnetic flowmeter (5 ft away is usually acceptable)
Service valve
DIAGNOSTICS
AND SERVICE
Analog Output Test
Fast Keys
1, 2, 2
LOI Key
Aux. Function
Pulse Output Test
Fast Keys
1, 2, 3
LOI Key
Aux. Function
Self Test
Fast Keys
1, 2, 1, 2
LOI Key
Aux. Function
The analog output test allows you to drive the transmitter output to a desired
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.
The pulse output test allows you to drive the frequency output at terminals 5
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.
The transmitter test initiates a series of diagnostic tests that are not performed
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 AA
March 2004
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.
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.
Step 3: Installed
Flowtube Tests
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table 5-4. Flowtube Test
Test
Flowtube
Location
Required
Equipment
Measuring at
Connections
A. Flowtube
Coil
Installed or
Uninstalled
Multimeter
1 and 2 = R
B. Shields to
Case
Installed or
Uninstalled
Multimeter
17 and
Expected Value
Potential Cause
2Ω ≤ R ≤ 18Ω
• Open or
Shorted Coil
• Remove and
replace flowtube
< 0.2Ω
• Moisture in
terminal block
• Leaky electrode
• Process behind
liner
• Clean terminal
block
• Remove
flowtube
∞Ω (< 1nS)
∞Ω (< 1nS)
• Process behind
liner
• Leaky electrode
• Moisture in
terminal block
• Remove
flowtube and dry
• Clean terminal
block
• Confirm with
flowtube coil
test
• Unstable R1 or
R2 values
confirm coated
electrode
• Shorted
electrode
• Electrode not in
contact with
process
• Empty Pipe
• Low conductivity
• Leaky electrode
• 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.
and case
ground
C. Coil Shield
to Coil
Installed or
Uninstalled
Multimeter
17 and case
ground
1 and
2 and
D. Electrode
Shield to
Electrode
Installed
LCR (Set to
Resistance
and 120 Hz)
18 and 17 = R1
19 and 17 = R2
R1 and R2 should be stable
NO: R 1 – R 2 ≤ 300Ω
N5, E5, CD,
ED: R 1 – R 2 ≤ 1500Ω
Corrective Action
To test the flowtube, a multimeter capable of measuring conductance in
nanosiemens is preferred. Nanosiemens is the reciprocal of resistance.
1
1nanosiemens = ---------------------------1gigaohm
or
1
1nanosiemens = ------------------------------1 × 10 9 ohm
5-8
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Figure 5-1. Flowtube Circuit
Diagram
68.1k (not applicable for
flowtubes with N0 hazardous
certification approval option
code)
68.1k
8712-0007E04A
Flowtube Housing
Step 4: Uninstalled
Flowtube Tests
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
8711-8711f01a
Figure 5-2. 45° Electrode Plane
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
(1)
18 and Electrode
N0
N5, KD
≤ 275 Ω
61kΩ ≤ R ≤ 75k Ω
19 and Electrode
≤ 275 Ω
61kΩ ≤ R ≤ 75k Ω
17 and Grounding Electrode
≤ 0.3 Ω
≤ 0.3 Ω
17 and Ground Symbol
≤ 0.3 Ω
Open
Open
Open
≤ 0.3 Ω
Open
Open
Open
(1)
17 and 18
17 and 19
17 and 1
(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 Ω .
Table 5-6. Uninstalled Rosemount 8711 Wafer Flowtube Tests
Hazardous Location Certification
Measuring at Connections
N0
N5, E5, CD
≤ 0.3 Ω
61kΩ ≤ R ≤ 75k Ω
19 and Electrode
≤ 275 Ω
61kΩ ≤ R ≤ 75k Ω
17 and Grounding Electrode
≤ 0.3 Ω
≤ 0.3 Ω
17 and Grounding Symbol
≤ 0.3 Ω
Open
Open
Open
≤ 0.3 Ω
Open
Open
Open
(1)
18 and Electrode
(2)
17 and 18
17 and 19
17 and 1
(1) Measure the electrode closest to the junction box
(2) Measure the electrode farthest away from the junction box.
5-10
Reference Manual
00809-0100-4661, Rev AA
March 2004
Appendix A
Rosemount 8712D
Reference Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-7
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-8
SPECIFICATIONS
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
0.6
0.4
0.2
0
0
20
10
30
40
50
8721/8721_B_01.EPS
Supply Current (Amps)
0.8
Power Supply (Volts)
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)
Enclosure Ratings
NEMA 4X, CSA Enclosure Type 4X, IEC 529, IP65, Pollution Degree II
A-2
Reference Manual
00809-0100-4661, Rev AA
March 2004
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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 AA
March 2004
Performance
Specifications
Rosemount 8712D
(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 3 to 39.3 ft/s (0.9 to 12 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
Reference Manual
00809-0100-4661, Rev AA
March 2004
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
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 AA
March 2004
Rosemount 8712D
DIMENSIONAL
DRAWINGS
Figure A-1. Rosemount 8712D
Transmitter
WITH STANDARD
COVER
WITH LOI COVER
LOI Cover
Standard
Cover
9.01
(229)
2.81
(71)
4.31
(109)
3.51
(89)
3.11
(79)
0.44
(11)
11.15
(283)
12.02
(305)
LOI Keypad
Cover
2.96
(75)
17.70 (450)
Ground Lug
NOTE
Dimensions are in inches (millimeters)
11.37
(289)
8712-12A01A, 8712B01A, 8712C01A, 8712D01A
¾–14 NPT
Conduit
Connection
(3 Places)
A-7
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
ORDERING
INFORMATION
Model
8712D (1)
Code
R
Product Description
Remote (2-inch pipe or surface mounting)
Power Supply Voltage
03
12
12–42 V dc
90-250 V ac, 50–60 Hz
Code
Product Certifications
N5
Code
B6
C1
C4
CN
D1
M4
J1
J2
•
Transmitter Style
Code
N0
Availability
Magnetic Flowmeter Transmitter
•
•
Factory Mutual (FM) Class I, Division 2 Approval for nonflammable fluids;
Canadian Standards Association (CSA) Class I, Division 2 Approval; CE Marking
Factory Mutual (FM) Class I, Division 2 Approval for flammable fluids; CE Marking
•
•
Options
Stainless Steel 4-bolt Kit for 2-inch Pipe Mount
Custom Configuration (Completed CDS required with order)
Analog Output Levels Compliant with NAMUR recommendations NE43, 18-January-1994, and high alarm level(2)
Analog Output Levels Compliant with NAMUR recommendations NE43, 18-January-1994, and low alarm level(2)
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(3)
Local Operator Interface (LOI)
CM 20 conduit adapter
PG 13.5 conduit adapter
Typical Model Number:
8712D
R
12
N0
M4
(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.
A-8
•
•
•
•
•
•
•
•
•
Reference Manual
00809-0100-4661, Rev AA
March 2004
Appendix B
Rosemount 8712D
Approval Information
European Directive Information . . . . . . . . . . . . . . . . . . . . page B-1
Hazardous Location Certifications . . . . . . . . . . . . . . . . . . page B-3
Approved Manufacturing
Locations
Rosemount Inc. — Chanhassen, Minnesota, USA
EUROPEAN DIRECTIVE
INFORMATION
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.
Fisher-Rosemount Technologias de Flujo, S.A. de C.V. —
Chihuahua, Chihuahua, Mexico
Type n protection type in accordance with EN50 021
•
European Pressure
Equipment Directive
(PED) (97/23/EC)
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.
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
Line Size: 30 inch - 36 inch with AWWA 125 flanges
QS Certificate of Assessment - EC No. PED-H-20
Module H Conformity Assessment
www.rosemount.com
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
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
Model 8721 Sanitary Magmeter Flowtubes
in line sizes of 11/2 inch and larger:
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.
Electro Magnetic
Compatibility (EMC)
(89/336/EEC)
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.
Low Voltage Directive
(93/68/EEC)
EN 61010-1: 1995
Other important
guidelines
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 AA
March 2004
Hazardous Location
Certifications
Rosemount 8712D
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
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Flowtube Approval
Information
Table B-2. Flowtube Option Codes (1)
Rosemount 8705 Flowtube Rosemount 8707 Flowtube Rosemount 8711 Flowtube
For
For
For
For
For
For
Approval Non-flammable Flammable Non-flammable Flammable Non-flammable Flammable
Codes
Fluids
Fluids
Fluids
Fluids
Fluids
Fluids
N0
N5
E5
CD(2)
KD(2)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
(1) CE Marking is standard on Model 8705 and 8711. No hazardous location certifications are available on the
Model 570TM.
(2) Refer to Table B-3 on page B-6 for relation between ambient temperature, process temperature, and
temperature class.
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
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
B-4
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
European Certifications
N1 ATEX Non-Sparking/Non-incendive (8705/8711 Only)
Certificate No: KEMA02ATEX1302X
EEx nA [L] IIC T3... T6
II 3G
SPECIAL CONDITIONS FOR SAFE USE:
The relation between ambient temperature, process temperature and
temperature class is to be taken from the tables under 15 - description)
above. (See Table B-5 on page B-7).
The electrical data is to be taken from the summary under (15 - electrical
data) above. (See Table B-6 on page B-8).
CD CENELEC Increased Safety (Zone 1) with IS Electrodes (8711 only)
Certificate No: KEMA03ATEX2052X
II 1/2G
EEx e ia IIC T3... T6 (Ta = -20 to +65°) (See Table B-3)
0575
KD CENELEC Increased Safety (Zone 1) with IS Electrodes (8705 only)
Certificate No. KEMA 03ATEX2052X
II 1/2G
EEx e ia IIC T3... T6 (Ta = -20 to 65°C) (See Table B-3)
0575
SPECIAL CONDITIONS FOR SAFE USE:
The relation between ambient temperature, process temperature and
temperature class is to be taken from the table under (15 - description) above.
(See Table B-3).
The electrical data is to be taken from the summary under (15 - electrical
data) above. (See Table B-4).
B-5
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table B-3. Relation between ambient temperature, process temperature, and
temperature class(1)
Meter Size
(Inches)
1
/2
1
1
11/2
11/2
2
2
2
3-4
3-4
3-4
3-4
6
6
6
6
8 - 36
8 - 36
8 - 36
8 - 36
Maximum Ambient
Temperature
Maximum Process
Temperature
Temperature Class
149°F (65°C)
149°F (65°C)
95°F (35°C)
149°F (65°C)
140°F (60°C)
149°F (65°C)
149°F (65°C)
104°F (40°C)
149°F (65°C)
149°F (65°C)
131°F (55°C)
104°F (40°C)
149°F (65°C)
149°F (65°C)
149°F (65°C)
140°F (60°C)
149°F (65°C)
149°F (65°C)
149°F (65°C)
149°F (65°C)
239°F (115°C)
248°F (120°C)
95°F (35°C)
257°F (125°C)
140°F (60°C)
257°F (125°C)
167°F (75°C)
104°F (40°C)
266°F (130°C)
194°F (90°C)
131°F (55°C)
104°F (40°C)
275°F (135°C)
230°F (110°C)
167°F (75°C)
140°F (60°C)
284°F (140°C)
239°F (115°C)
176°F (80°C)
149°F (65°C)
T3
T3
T4
T3
T4
T3
T4
T5
T3
T4
T5
T6
T3
T4
T5
T6
T3
T4
T5
T6
(1) This table is applicable for CD and KD option codes only.
Table B-4. Electrical Data for Rosemount 8705 and 8711 Flowtubes (1)
Coil excitation circuit
Electrode circuit:
40 V dc (pulsed), 0.5 A, 10 W maximum
in type of explosion protection intrinsic safety EEx ia IIC,
5 V 1 mW maximum, Um = 250 V
(1) This table is applicable for CD and KD option codes only.
B-6
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table B-5. Relation between the maximum ambient temperature, the
maximum process temperature, and the temperature class(1)
Maximum Ambient
Temperature
Maximum process temperature °F (°C) per temperature class
T3
T4
T5
T6
54°F (12°C)
66°F (19°C)
79°F (26°C)
90°F (32°C)
102°F (39°C)
115°F (46°C)
127°F (53°C)
138°F (59°C)
151°F (66°C)
163°F (73°C)
18°F (-8°C)
28°F (-2°C)
41°F (5°C)
54°F (12°C)
66°F (19°C)
79°F (26°C)
90°F (32°C)
102°F (39°C)
115°F (46°C)
127°F (53°C)
72°F (22°C)
84°F (29°C)
97°F (36°C)
109°F (43°C)
122°F (50°C)
135°F (57°C)
145°F (63°C)
158°F (70°C)
171°F (77°C)
183°F (84°C)
34°F (1°C)
46°F (8°C)
59°F (15°C)
72°F (22°C)
84°F (29°C)
97°F (36°C)
109°F (43°C)
122°F (50°C)
135°F (57°C)
145°F (63°C)
88°F (31°C)
97°F (36°C)
108°F (42°C)
118°F (48°C)
129°F (54°C)
140°F (60°C)
151°F (66°C)
160°F (71°C)
171°F (77°C)
181°F (83°C)
55°F (13°C)
66°F (19°C)
77°F (25°C)
88°F (31°C)
97°F (36°C)
108°F (42°C)
118°F (48°C)
129°F (54°C)
140°F (60°C)
151°F (66°C)
95°F (35°C)
104°F (40°C)
115°F (46°C)
124°F (51°C)
135°F (57°C)
144°F (62°C)
153°F (67°C)
163°F (73°C)
172°F (78°C)
183°F (84°C)
66°F (19°C)
75°F (24°C)
84°F (29°C)
95°F (35°C)
104°F (40°C)
115°F (46°C)
124°F (51°C)
135°F (57°C)
144°F (62°C)
153°F (67°C)
0.5 inch flowtube size
149°F (65°C)
140°F (60°C)
131°F (55°C)
122°F (50°C)
113°F (45°C)
104°F (40°C)
95°F (35°C)
86°F (30°C)
77°F (25°C)
68°F (20°C)
297°F (147°C)
309°F (154°C)
322°F (161°C)
334°F (168°C)
347°F (175°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
138°F (59°C)
151°F (66°C)
163°F (73°C)
176°F (80°C)
189°F (87°C)
199°F (93°C)
212°F (100°C)
225°F (107°C)
237°F (114°C)
248°F (120°C)
1.0 inch flowtube size
149°F (65°C)
140°F (60°C)
131°F (55°C)
122°F (50°C)
113°F (45°C)
104°F (40°C)
95°F (35°C)
86°F (30°C)
77°F (25°C)
68°F (20°C)
318°F (159°C)
331°F (166°C)
343°F (173°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
149°F (65°C)
140°F (60°C)
131°F (55°C)
122°F (50°C)
113°F (45°C)
104°F (40°C)
95°F (35°C)
86°F (30°C)
77°F (25°C)
68°F (20°C)
297°F (147°C)
307°F (153°C)
318°F (159°C)
329°F (165°C)
340°F (171°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
149°F (65°C)
140°F (60°C)
131°F (55°C)
122°F (50°C)
113°F (45°C)
104°F (40°C)
95°F (35°C)
86°F (30°C)
77°F (25°C)
68°F (20°C)
289°F (143°C)
300°F (149°C)
309°F (154°C)
318°F (159°C)
329°F (165°C)
338°F (170°C)
349°F (176°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
158°F (70°C)
171°F (77°C)
183°F (84°C)
196°F (91°C)
207°F (97°C)
219°F (104°C)
232°F (111°C)
244°F (118°C)
257°F (125°C)
270°F (132°C)
1.5 inch flowtube size
160°F (71°C)
171°F (77°C)
181°F (83°C)
192°F (89°C)
203°F (95°C)
214°F (101°C)
223°F (106°C)
234°F (112°C)
244°F (118°C)
255°F (124°C)
2.0 inch flowtube size
163°F (73°C)
172°F 78(°C)
183°F (84°C)
192°F (89°C)
201°F (94°C)
212°F (100°C)
221°F (105°C)
232°F (111°C)
241°F (116°C)
252°F (122°C)
B-7
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Table B-5. Relation between the maximum ambient temperature, the
maximum process temperature, and the temperature class(1)
Maximum Ambient
Temperature
Maximum process temperature °F (°C) per temperature class
T3
T4
T5
T6
117°F (47°C)
129°F (54°C)
144°F (62°C)
156°F (69°C)
171°F (77°C)
183°F (84°C)
198°F (92°C)
203°F (95°C)
203°F (95°C)
203°F (95°C)
75°F (24°C)
90°F (32°C)
102°F (39°C)
117°F (47°C)
129°F (54°C)
144°F (62°C)
156°F (69°C)
171°F (77°C)
176°F (80°C)
176°F (80°C)
3 to 60 inch flowtube size
149°F (65°C)
140°F (60°C)
131°F (55°C)
122°F (50°C)
113°F (45°C)
104°F (40°C)
95°F (35°C)
86°F (30°C)
77°F (25°C)
68°F (20°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
351°F (177°C)
210°F (99°C)
223°F (106°C)
237°F (114°C)
250°F (121°C)
264°F (129°C)
266°F (130°C)
266°F (130°C)
266°F (130°C)
266°F (130°C)
266°F (130°C)
(1) This table is applicable for N1 option codes only.
Table B-6. Electrical Data for Rosemount 8705 and 8711 Flowtubes (1)
Coil excitation circuit
Electrode circuit:
40 V dc (pulsed), 0.5 A, 20 W maximum
Ui=5 V, Ii = 0.2 mA, Pi = mW; Ci and Li are negligibly small. Under
normal operating conditions, the electrical data of the associated flow
transmitter shall not exceed the values mentioned above.
(1) This table is applicable for N1 option codes only.
B-8
Reference Manual
00809-0100-4661, Rev AA
March 2004
Appendix C
Rosemount 8712D
Digital Signal Processing
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-1
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-2
SAFETY MESSAGES
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.
Warnings
Explosions could result in death or serious injury:
•
Verify that the operating atmosphere of the flowtube
and transmitter is consistent with the appropriate
hazardous locations certifications.
•
Do not remove the transmitter cover in explosive atmospheres
when the circuit is alive.
•
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.
•
Both transmitter covers must be fully engaged to meet
explosion-proof requirements.
Failure to follow safe installation and servicing guidelines could result in death or
serious injury:
•
Make sure only qualified personnel perform the installation.
•
Do not perform any service other than those contained in this manual unless
qualified.
Process leaks could result in death or serious injury:
•
The electrode compartment may contain line pressure; it must be depressurized
before the cover is removed.
High voltage that may be present on leads could cause
electrical shock:
•
www.rosemount.com
Avoid contact with leads and terminals.
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
PROCEDURES
If the output of your Rosemount 8712D is unstable, first check the wiring and
grounding associated with the magnetic flowmeter system. Ensure that the
following conditions are met:
•
Ground straps are attached to the adjacent flange or ground ring?
•
Grounding rings, lining protectors, or grounding electrodes are being
used in lined or nonconductive piping?
•
Both of the shields attached at both ends?
The causes of unstable transmitter output can usually be traced to extraneous
voltages on the measuring electrodes. This “process noise” can arise from
several causes including electrochemical reactions between the fluid and the
electrode, chemical reactions in the process itself, free ion activity in the fluid,
or some other disturbance of the fluid/electrode capacitive layer. In such noisy
applications, an analysis of the frequency spectrum reveals process noise
that typically becomes significant below 15 Hz.
In some cases, the effects of process noise may be sharply reduced by
elevating the coil drive frequency above the 15 Hz region. The Rosemount
8712D coil drive mode is selectable between the standard 5 Hz and the
noise-reducing 37 Hz. See “Coil Drive Frequency” on page 3-15 for
instructions on how to change the coil drive mode to 37 Hz.
Auto Zero
To ensure optimum accuracy when using 37 Hz coil drive mode, there is an
auto zero function that must be initiated during start-up. The auto zero
operation is also discussed in the start-up and configuration sections. When
using 37 Hz coil drive mode it is important to zero the system for the specific
application and installation.
The auto zero procedure should be performed only under
the following conditions:
•
With the transmitter and flowtube installed in their final positions. This
procedure is not applicable on the bench.
•
With the transmitter in 37 Hz coil drive mode. Never attempt this
procedure with the transmitter in 5 Hz coil drive mode.
•
With the flowtube full of process fluid at zero flow.
These conditions should cause an output equivalent to zero flow.
Signal Processing
If the 37 Hz coil drive mode has been set, and the output is still unstable, the
damping and signal processing function should be used. It is important to set
the coil drive mode to 37 Hz first, so the loop response time is not increased.
The 8712D provides for a very easy and straightforward start-up, and also
incorporates the capability to deal with difficult applications that have
previously manifested themselves in a noisy output signal. In addition to
selecting a higher coil drive frequency (37 Hz vs. 5 Hz) to isolate the flow
signal from the process noise, the 8712D microprocessor can actually
scrutinize each input based on three user-defined parameters to reject the
noise specific to the application.
C-2
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
This software technique, known as signal processing, “qualifies” individual
flow signals based on historic flow information and three user-definable
parameters, plus and on/off control. These parameters are:
1.
Number of samples: 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 1/10 second
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
2.
Maximum Percent Limit: The tolerance band set up on either side of
the running average, referring to percent deviation from the average.
Values within the limit are accepted while value outside the limit are
scrutinized to determine if they are a noise spike or an actual flow
change. Factory Preset Value = 2 percent.
3.
Time Limit: Forces the output and running average values to the new
value of an actual flow rate change that is outside the percent limit
boundaries, thereby limiting response time to real flow changes to the
time limit value rather than the length of the running average. Factory
Preset Value = 2 seconds.
C-3
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
How Does It Really Work?
The best way to explain this is with the help of an example, plotting flow rate
versus time
Figure C-1. Signal Processing
.
Flow
Rate
8712-0292A
Max
%
Limit
Time Limit
12 Samples = 1
Second
Time
x:
o:
Input flow signal from flowtube.
Average flow signals and transmitter output, determined by the “number
of samples” parameter.
Tolerance band, determined by the “percent limit” parameter.
– Upper value = average flow + [(percent limit/100) average flow]
– Lower value = average flow – [(percent limit/100) average flow]
C-4
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
This scenario is that of a typical non-noisy flow. The input flow signal is
within the percent limit tolerance band, therefore qualifying itself as a
good input. In this case the new input is
added directly into the running average and is passed on as a part of the
average value to the output.
This signal is outside the tolerance band and therefore is held in memory
until the next input can be evaluated. The running average is provided as
the output.
The previous signal currently held in memory is simply rejected
as a noise spike since the next flow input signal is back within the
tolerance band. This results in complete rejection of noise spikes rather
than allowing them to be “averaged” with the good signals as occurs in
the typical analog damping circuits.
As in Number above, the input is outside the tolerance band.
This first signal is held in memory and compared to the next signal. The
next signal is also outside the tolerance band (in the same direction), so
the stored value is added to the running average as the next input and
the running average begins to slowly approach the new input level.
To avoid waiting for the slowly incrementing average value to catch up to
the new level input, a shortcut is provided. This is the “time limit”
parameter. The user can set this parameter to eliminate the slow
ramping of the output toward the new input level.
When Should Signal Processing Be Used?
The Rosemount 8712D offers three separate functions that can be used in
series for improving a noisy output. The first step is to toggle the coil drive to
the 37 Hz mode and initialize with an auto zero. If the output is still noisy at
this stage, signal processing should be actuated and, if necessary, tuned to
match the specific application. Finally, if the signal is still too unstable, the
traditional damping function can be used.
NOTE
Failure to complete an Auto Zero will result in a small (<1%) error in the
output. While the output level will be offset by the error, the repeatability will
not be affected.
C-5
Reference Manual
Rosemount 8712D
C-6
00809-0100-4661, Rev AA
March 2004
Reference Manual
00809-0100-4661, Rev AA
March 2004
Appendix D
Rosemount 8712D
Wiring Diagrams
Rosemount Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-3
Brooks Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-7
Perform the Universal Auto Trim function. . . . . . . . . . . . page D-6
Fischer And Porter Flowtubes . . . . . . . . . . . . . . . . . . . . . . page D-10
Foxboro Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-16
Kent Veriflux VTC Flowtube . . . . . . . . . . . . . . . . . . . . . . . . page D-20
Kent Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-21
Krohne Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-22
Taylor Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-23
Yamatake Honeywell Flowtubes . . . . . . . . . . . . . . . . . . . . page D-25
Yokogawa Flowtubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-26
Generic Manufacturer Flowtubes . . . . . . . . . . . . . . . . . . . page D-27
The wiring diagrams in this section illustrate the proper connections between
the Rosemount 8712D and most flowtubes currently on the market. Specific
diagrams are included for most models, and where information for a particular
model of a manufacturer is not available, a generic drawing pertaining to that
manufacturers’ flowtubes is provided. If the manufacturer for your flowtube is
not included, see the drawing for generic connections.
www.rosemount.com
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Rosemount Transmitter
Rosemount
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Brooks
Rosemount 8712D
Rosemount 8712D
Endress and Hauser
Rosemount 8712D
Fischer and Porter
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Foxboro
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Rosemount 8712D
Kent
Rosemount 8712D
Rosemount 8712D
Krohne
Rosemount 8712D
Taylor
Rosemount 8712D
Rosemount 8712D
Yamatake Honeywell
Rosemount 8712D
Yokogawa
Rosemount 8712D
Generic Manufacturer Wiring
Rosemount 8712D
D-2
Flowtube Manufacturer
Page Number
Rosemount 8705, 8707, 8711
Rosemount 8707
Rosemount 8701
Rosemount 8711
page D-3
page D-3
page D-4
page D-5
Model 5000
Model 7400
Model 10D1418
Model 10D1419
Model 10D1430 (Remote)
Model 10D1430
Model 10D1465, 10D1475 (Integral)
Generic Wiring for Flowtubes
page D-7
page D-8
page D-6
page D-9
page D-10
page D-10
page D-11
page D-12
page D-13
page D-14
page D-15
Series 1800
Series 1800 (Version 2)
Series 2800
Generic Wiring for Flowtubes
page D-16
page D-17
page D-18
page D-19
Veriflux VTC
Generic Wiring for Flowtubes
page D-20
page D-21
Generic Wiring for Flowtubes
page D-22
Series 1100
Generic Wiring for Flowtubes
page D-24
page D-24
Generic Wiring for Flowtubes
page D-25
Generic Wiring for Flowtubes
page D-26
page D-27
page D-27
Generic Wiring for Flowtube
Generic Wiring for Flowtubes
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
ROSEMOUNT
FLOWTUBES
Rosemount
8705/8707/8711
Flowtubes to
Rosemount 8712D
Transmitter
Connect coil drive and electrode cables as shown in Figure D-1.
8712-04A
Figure D-1. Wiring Diagram to a
Rosemount 8712D Transmitter
Table D-1. Rosemount 8705/8707/8711 Flowtube Wiring Connections
Rosemount 8712D Transmitters
Rosemount 8705/8707/8711 Flowtubes
1
2
1
2
17
18
19
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-3
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Rosemount 8701
Flowtube to Rosemount
8712D Transmitter
ROSEMOUNT 8701
FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
8712-8712O11A
Figure D-2. Wiring Diagram for
Rosemount 8701 Flowtube and
Rosemount 8712D Transmitter
Connect coil drive and electrode cables as shown in Figure D-2.
Table D-2. Rosemount 8701 Flowtube Wiring Connections
Rosemount 8712D
Rosemount 8701 Flowtubes
1
2
1
2
17
18
19
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-4
Reference Manual
00809-0100-4661, Rev AA
March 2004
Figure D-3. Wiring Diagram for
Rosemount 8711 Flowtube and
Rosemount 8712D Transmitter
Connect coil drive and electrode cables as shown in Figure D-3.
ROSEMOUNT 8711
FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
8712-8712N11A
Rosemount 8711
Flowtube to Rosemount
8712D Transmitter
Rosemount 8712D
Table D-3. Rosemount 8711 Flowtube Wiring Connections
Rosemount 8712D
Rosemount 8711 Flowtubes
1
2
Coils +
Coils –
17
18
19
Shield
Electrode +
Electrode –
This is a pulsed dc magnetic flowmeter. 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.
D-5
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Connecting Flowtubes of
Other Manufacturers
Before connecting another manufacturer’s flowtube to the Rosemount 8712D
transmitter, it is necessary to perform the following functions.
1.
Turn off the ac power to the flowtube and transmitter. Failure to do so
could result in electrical shock or damage to the transmitter.
2.
Verify that the coil drive cables between the flowtube and the
transmitter are not connected to any other equipment.
3.
Label the coil drive cables and electrode cables for connection to the
transmitter.
4.
Disconnect the wires from the existing transmitter.
5.
Remove the existing transmitter. Mount the new transmitter. See
“Mount the Transmitter” on page 2-3.
6.
Verify that the flowtube coil is configured for series connection. Other
manufacturers flowtubes may be wired in either a series or parallel
circuit. All Rosemount magnetic flowtubes are wired in a series
circuit. (Other manufacturers AC flowtubes (AC coils) wired for 220V
operation are typically wired in parallel and must be rewired in series.)
7.
Verify that the flowtube is in good working condition. Use the
manufacturer’s recommended test procedure for verification of
flowtube condition. Perform the basic checks:
a. Check the coils for shorts or open circuits.
b. Check the flowtube liner for wear or damage.
c. Check the electrodes for shorts, leaks, or damage.
8.
Connect the flowtube to the transmitter in accordance with reference
wiring diagrams. See Appendix D: Wiring Diagrams for specific
drawings.
9.
Connect and verify all connections between the flowtube and the
transmitter, then apply power to the transmitter.
10. Perform the Universal Auto Trim function.
This is a pulsed dc magnetic flowmeter. 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.
D-6
Reference Manual
00809-0100-4661, Rev AA
March 2004
BROOKS FLOWTUBES
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-4.
Model 5000 Flowtube to
Rosemount 8712D
Transmitter
BROOKS MODEL
5000
ROSEMOUNT 8712D
TRANSMITTER
8712/8712P11A
Figure D-4. Wiring Diagram for
Brooks Flowtube Model 5000
and Rosemount 8712D
Table D-4. Brooks Model 5000 Flowtube Wiring Connections
Rosemount 8712D
Brooks Flowtubes Model 5000
1
2
1
2
17
18
19
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-7
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Model 7400 Flowtube to
Rosemount 8712D
Transmitter
Figure D-5. Wiring Diagram for
Brooks Flowtube Model 7400
and Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-5.
BROOKS MODEL 7400
8712-8712N11A
ROSEMOUNT 8712D
TRANSMITTER
Table D-5. Brooks Model 7400 Flowtube Wiring Connections
Rosemount 8712D
Brooks Flowtubes Model 7400
1
2
Coils +
Coils –
17
18
19
Shield
Electrode +
Electrode –
This is a pulsed dc magnetic flowmeter. 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.
D-8
Reference Manual
00809-0100-4661, Rev AA
March 2004
ENDRESS AND HAUSER
FLOWTUBES
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-6.
Endress and Hauser
Flowtube to
Rosemount 8712D
Transmitter
Figure D-6. Wiring Diagram for
Endress and Hauser Flowtubes
and Rosemount 8712D
ROSEMOUNT 8712D
TRANSMITTER
ENDRESS AND HAUSER
FLOWTUBES
7
Electrodes
5
4
14
Coils
42
41
8712-8712E01A
Fuse
Table D-6. Endress and Hauser Flowtube Wiring Connections
Rosemount 8712D
Endress and Hauser Flowtubes
1
2
41
42
14
4
5
7
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-9
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
FISCHER AND PORTER
FLOWTUBES
Connect coil drive and electrode cables as shown in Figure D-7.
Model 10D1418 Flowtube
to Rosemount 8712D
Transmitter
Figure D-7. Wiring Diagram for
Fischer and Porter Flowtube
Model 10D1418 and Rosemount
8712D
Electrode Connections
ROSEMOUNT
8712D
TRANSMITTER
3
2
1
U1
U2
G
L1
8712-1000A01B
L2
8
6
7
5
Coil Connections
Table D-7. Fischer and Porter Model 10D1418 Flowtube Wiring Connections
Rosemount 8712D
Fischer and Porter Model 10D1418 Flowtubes
1
2
L1
L2
Chassis Ground
3
1
2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-10
Reference Manual
00809-0100-4661, Rev AA
March 2004
Model 10D1419 Flowtube
to Rosemount 8712D
Transmitter
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-8.
Figure D-8. Wiring Diagram for
Fischer and Porter Flowtube
Model 10D1419 and Rosemount
8712D
ROSEMOUNT
8712D
TRANSMITTER
Electrode Connections
3
2
1
16
17
18
L1
L2
8712-100A01A
Coil Connections
Table D-8. Fischer and Porter Model 10D1419 Flowtube Wiring Connections
Rosemount 8712D
Fischer and Porter Model 10D1419 Flowtubes
1
2
L1
L2
3
3
1
2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-11
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Model 10D1430 Flowtube
(Remote) to
Rosemount 8712D
Transmitter
Figure D-9. Wiring Diagram for
Fischer and Porter Flowtube
Model 10D1430 (Remote) and
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-9.
Electrode Connections
ROSEMOUNT
8712D
TRANSMITTER
1
2
3
G
L1
8
8712-1000A01C
Coil Connections
Table D-9. Fischer and Porter Model 10D1430 (Remote) Flowtube
Wiring Connections
Rosemount 8712D
1
2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-12
Fischer and Porter Model 10D1430 (Remote)
Flowtubes
L1
8
G
3
1
2
Reference Manual
00809-0100-4661, Rev AA
March 2004
Connect coil drive and electrode cables as shown in Figure D-10.
Figure D-10. Wiring Diagram for
Fischer and Porter Flowtube
Model 10D1430 (Integral) and
Rosemount 8712D
Electrode Connections
ROSEMOUNT
8712D
TRANSMITTER
1
2
3
1
2
3
7
6
7
6
8
L2
To L2
L2
L1
U2
U1
TB1
L1
U2
U1
G
8712-1000A01E
Model 10D1430 Flowtube
(Integral) to
Rosemount 8712D
Transmitter
Rosemount 8712D
Coil Connections
TB2
To Calibration Device
(Disconnect)
Table D-10. Fischer and Porter Model 10D1430 (Integral) Flowtube
Wiring Connections
Rosemount 8712D
1
2
17
18
19
Fischer and Porter Model 10D1430 (Integral)
Flowtubes
L1
L2
G
3
1
2
This is a pulsed dc magnetic flowmeter. 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.
D-13
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Model 10D1465 and
Model 10D1475
Flowtubes (Integral) to
8712D Transmitter
Figure D-11. Wiring Diagram for
Fischer and Porter Flowtube
Model 10D1465 and Model
10D1475 (Integral) and
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-11.
Electrode
Connections
2A
ROSEMOUNT
8712D
TRANSMITTER
2
Disconnect 1
5
6
16
3
8712-1000A01D
CT
M2
M1
MR
Coil Connections
Table D-11. Fischer and Porter Model 10D1465 and 10D1475 Flowtube
Wiring Connections
Rosemount 8712D
1
2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-14
Fischer and Porter Model 10D1465 and
10D1475 Flowtubes
MR
M1
3
3
1
2
Reference Manual
00809-0100-4661, Rev AA
March 2004
Figure D-12. Generic Wiring
Diagram for Fischer and Porter
Flowtubes and Rosemount
8712D
Connect coil drive and electrode cables as shown in Figure D-12.
ROSEMOUNT 8712D
TRANSMITTER
FISCHER AND PORTER
FLOWTUBES
2
Electrodes
1
3
Chassis
M2
Coils
M1
Fuse
8712-8712E01A
Fischer and Porter
Flowtube to
Rosemount 8712D
Transmitter
Rosemount 8712D
Table D-12. Fischer and Porter Generic Flowtube Wiring Connections
Rosemount 8712D
Fischer and Porter Flowtubes
1
2
M1
M2
Chassis Ground
3
1
2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-15
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
FOXBORO FLOWTUBES
Connect coil drive and electrode cables as shown in Figure D-13.
Series 1800 Flowtube to
Rosemount 8712D
Transmitter
Figure D-13. Wiring Diagram for
Foxboro Series 1800 and
Rosemount 8712D
FOXBORO SERIES
1800 FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
Electrode Connections
Outer Shield
White Lead
White Shield
8712-8712A11A
Black Lead
Black Shield
Inner Shield
Coil Connections
Table D-13. Foxboro Generic Flowtube Wiring Connections
Rosemount 8712D
Foxboro Series 1800 Flowtubes
1
2
L1
L2
Chassis Ground
Any Shield
Black
White
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-16
Reference Manual
00809-0100-4661, Rev AA
March 2004
Figure D-14. Wiring Diagram for
Foxboro Series 1800 (Version 2)
and Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-14.
FOXBORO SERIES
1800 FLOWTUBE
(VERSION 2)
ROSEMOUNT
8712D
TRANSMITTER
White
Black
Shield
8712-8712E11A
Series 1800 (Version 2)
Flowtube to
Rosemount 8712D
Transmitter
Rosemount 8712D
Electrode
Connections
GND
L2
L1
Coil Connections
Table D-14. Foxboro Generic Flowtube Wiring Connections
Rosemount 8712D
Foxboro Series 1800 Flowtubes
1
2
L1
L2
Chassis Ground
Any Shield
Black
White
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-17
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Series 2800 Flowtube to
8712D Transmitter
Figure D-15. Wiring Diagram for
Foxboro Series 2800 and
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-15.
FOXBORO SERIES
1800 FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
Electrode Connections
Outer Shield
White Lead
White Shield
White
Black
Any Shield
8712-8712A11A
Black Lead
Black Shield
Inner Shield
L2
L1
G
Coil Connections
Table D-15. Foxboro Series 2800 Flowtube Wiring Connections
Rosemount 8712D
Foxboro Series 2800 Flowtubes
1
2
L1
L2
Chassis Ground
Any Shield
Black
White
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-18
Reference Manual
00809-0100-4661, Rev AA
March 2004
Foxboro Flowtube to
8712D Transmitter
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-16.
Figure D-16. Generic Wiring
Diagram for Foxboro Flowtubes
and Rosemount 8712D
ROSEMOUNT 8712D
TRANSMITTER
FOXBORO
FLOWTUBE
White
Black
Electrodes
Any Shield
Ground
Coils
L2
L1
8712-8712E01A
Fuse
Table D-16. Foxboro Flowtube Wiring Connections
Rosemount 8712D
Foxboro Flowtubes
1
2
L1
L2
Chassis Ground
Any Shield
Black
White
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-19
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
KENT VERIFLUX VTC
FLOWTUBE
Connect coil drive and electrode cables as shown in Figure D-17.
Veriflux VTC Flowtube to
8712D Transmitter
Figure D-17. Wiring Diagram for
Kent Veriflux VTC Flowtube and
Rosemount 8712D
KENT VERIFLUX VTC
FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
Electrode Connections
1SCR OUT
2
3 SIG 1
4 SIG 2
5
6
Coil Connections
Table D-17. Kent Veriflux VTC Flowtube Wiring Connections
Rosemount 8712D
Kent Veriflux VTC Flowtubes
1
2
2
1
SCR OUT
SCR OUT
SIG1
SIG2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-20
8712/8712I11A
1
2–
5+
6 SCR OUT
Fuse
Reference Manual
00809-0100-4661, Rev AA
March 2004
KENT FLOWTUBES
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-18.
Kent Flowtube to
Rosemount 8712D
Transmitter
KENT
FLOWTUBES
ROSEMOUNT 8712D
TRANSMITTER
SIG2
Electrodes
SIG1
SCR OUT
SCR OUT
Coils
2
1
Fuse
8712-8712E01A
Figure D-18. Generic Wiring
Diagram for Kent Flowtubes and
Rosemount 8712D
Table D-18. Kent Flowtube Wiring Connections
Rosemount 8712D
Kent Flowtubes
1
2
1
2
SCR OUT
SCR OUT
SIG1
SIG2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-21
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
KROHNE FLOWTUBES
Connect coil drive and electrode cables as shown in Figure D-19.
Krohne Flowtube to
Rosemount 8712D
Transmitter
Figure D-19. Generic Wiring
Diagram for Krohne Flowtubes
and Rosemount 8712D
ROSEMOUNT 8712D
TRANSMITTER
KROHNE
FLOWTUBES
3
2
Electrodes
Electrode Shield
Coil Shield
Coils
7
8
8712-8712E01A
Fuse
Table D-19. Krohne Flowtube Wiring Connections
Rosemount 8712D
Krohne Flowtubes
1
2
8
7
Coil Shield
Electrode Shield
2
3
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-22
Reference Manual
00809-0100-4661, Rev AA
March 2004
TAYLOR FLOWTUBES
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-20.
Series 1100 Flowtube to
Rosemount 8712D
Transmitter
Figure D-20. Wiring Diagram for
Taylor Series 1100 Flowtubes
and Rosemount 8712D
TAYLOR SERIES 1100
FLOWTUBE
ROSEMOUNT 8712D
TRANSMITTER
Electrode Connections
C
L
A
R
LNG1234
8712-8712J11A
White
Black
Green
Coil Connections
Table D-20. Taylor Series 1100 Flowtube Wiring Connections
Rosemount 8712D
Taylor Series 1100 Flowtubes
1
2
Black
White
Green
S1 and S2
E1
E2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-23
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
Taylor Flowtube to
Rosemount 8712D
Transmitter
Figure D-21. Generic Wiring
Diagram for Taylor Flowtubes
and Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-21.
TAYLOR
FLOWTUBES
ROSEMOUNT 8712D
TRANSMITTER
E2
E1
Electrodes
S1 and S2
Green
Coils
White
Black
8712-8712E01A
Fuse
Table D-21. Taylor Flowtube Wiring Connections
Rosemount 8712D
Taylor Flowtubes
1
2
Black
White
Green
S1 and S2
E1
E2
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-24
Reference Manual
00809-0100-4661, Rev AA
March 2004
YAMATAKE
HONEYWELL
FLOWTUBES
Rosemount 8712D
Connect coil drive and electrode cables as shown in Figure D-22.
Yamatake Honeywell
Flowtube to
Rosemount 8712D
Transmitter
ROSEMOUNT 8712D
TRANSMITTER
YAMATAKE
HONEYWELL
FLOWTUBES
A
Electrodes
B
C
Chassis Ground
Coils
Y
X
Fuse
8712-8712E01A
Figure D-22. Generic Wiring
Diagram for Yamatake
Honeywell Flowtubes and
Rosemount 8712D
Table D-22. Yamatake Honeywell Flowtube Wiring Connections
Rosemount 8712D
Yamatake Honeywell Flowtubes
1
2
X
Y
Chassis Ground
C
B
A
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-25
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
YOKOGAWA
FLOWTUBES
Connect coil drive and electrode cables as shown in Figure D-23.
Yokogawa Flowtube to
Rosemount 8712D
Transmitter
Figure D-23. Generic Wiring
Diagram for Yokogawa
Flowtubes and Rosemount
8712D
ROSEMOUNT 8712D
TRANSMITTER
YOKOGAWA
FLOWTUBES
A
Electrodes
B
C
Chassis Ground
Coils
Ex 2
Ex 1
8712-8712E01A
Fuse
Table D-23. Yokogawa Flowtube Wiring Connections
Rosemount 8712D
Yokogawa Flowtubes
1
2
EX1
EX2
Chassis Ground
C
B
A
17
18
19
This is a pulsed dc magnetic flowmeter. 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.
D-26
Reference Manual
00809-0100-4661, Rev AA
March 2004
Rosemount 8712D
GENERIC
MANUFACTURER
FLOWTUBES
Generic Manufacturer
Flowtube to
Rosemount 8712D
Transmitter
Identify the Terminals
First check the flowtube manufacturer’s manual to identify the appropriate
terminals. Otherwise, perform the following procedure.
Identify coil and electrode terminals
1.
Select a terminal and touch an ohmmeter probe to it.
2.
Touch the second probe to each of the other terminals and record the
results for each terminal.
3.
Repeat the process and record the results for every terminal.
Coil terminals will have a resistance of approximately 3-300 ohms.
Electrode terminals will have an open circuit.
Identify a chassis ground
1.
Touch one probe of an ohmmeter to the flowtube chassis.
2.
Touch the other probe to the each flowtube terminal and the record
the results for each terminal.
The chassis ground will have a resistance value of one ohm or less.
Wiring Connections
Connect the electrode terminals to Rosemount 8712D terminals
18 and 19. The electrode shield should be connected to terminal 17.
Connect the coil terminals to Rosemount 8712D terminals 1, 2, and
.
If the Rosemount 8712D Transmitter indicates a reverse flow condition, switch
the coil wires connected to terminals 1 and 2.
This is a pulsed dc magnetic flowmeter.
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.
D-27
Reference Manual
Rosemount 8712D
D-28
00809-0100-4661, Rev AA
March 2004
Reference Manual
00809-0100-4661, Rev AA
3/10/04
Rosemount 8712D
Index
A
Accuracy . . . . . . . . . . . . . . . . . . A-5
Action Keys
Handheld Communicator . . 3-26
Alarm Level . . . . . . . . . . . . . . . 3-15
Alphanumeric Keys
Handheld Communicator . . 3-27
Ambient Temperature . . . . . . . . . A-5
Operating . . . . . . . . . . . . . . A-2
Storage . . . . . . . . . . . . . . . A-2
Ambient Temperature Limits . . . . A-2
Analog Output
Range . . . . . . . . . . . . . . . . 3-7
Test . . . . . . . . . . . . . . . . . . 5-6
Zero . . . . . . . . . . . . . . . . . . 3-8
Analog Output Adjustment . . . . . A-3
Analog Output Test . . . . . . . . . . . A-3
Analog Power . . . . . . . . . . . . . . 2-4
Applications/Configurations . . . . . 2-4
Approval Information . . . . . . . . . B-1
ATEX Directive . . . . . . . . . . . . . B-1
Auto Zero . . . . . . . . . . . . . . . . .C-2
Auto Zero Trim . . . . . . . . . . . . . 3-21
Auxiliary Output 2-11, 3-13, 3-14, A-3
B
Base Time Unit . . . . . . . . . . . . 3-12
Basic Setup . . . . . . . . . . . . . . . . 3-6
Bolts
Flanged . . . . . . . . . . . . . . . 4-7
C
Cables
Conduit . . . . . . . . . . 2-6, 2-14
Calibration Number . . . . . . . . . . 3-9
Certifications
ATEX Directive . . . . . . . . . . B-1
Electro Magnetic
Compatibility . . . . . . . . . . . B-2
Pressure Equipment
Directive . . . . . . . . . . . . . B-1
Coil Drive Frequency . . . . . . . . 3-15
Conduit Connections
Installation . . . . . . . . 2-6, 2-14
Conduit Ports and Connections
Wiring . . . . . . . . . . . . . . . . 2-5
www.rosemount.com
Configurations/Applications .
Connections
Handheld Communicator
Control Status
Filter Mode . . . . . . . . . .
Cover Gasket, Materials
of Construction . . . . . . . . . .
. . . 2-4
. . 3-25
. . 3-15
. . . A-6
D
Damping . . . . . . . . . . . . . 3-9, A-4
Data Entry
Handheld Communicator . . 3-27
Date . . . . . . . . . . . . . . . . . . . . 3-17
Dedicated Conduit . . . . . . . . . . 2-12
Device Software Functions
Basic Setup . . . . . . . . . . . . 3-6
Diagnostics And Service . . . 5-6
Miscellaneous Functions . . 3-17
Multidrop Communications . 3-22
Review Variables . . . . . . . 3-17
Diagnostic Messages . . . . . . . . . 5-2
Handheld Communicator . . 3-30
LOI . . . . . . . . . . . . . . . . . . 3-6
Diagnostics and Service . . . . . . . 5-6
Digital Signal Processing . . . . . . C-1
Dimensional Drawings . . . . . . . . A-7
Direction . . . . . . . . . . . . . . . . . . 4-5
Downstream/Upstream Piping . . . 4-4
E
Electrical
Considerations . . . . . . . . . . 2-6
Electrical Connections . . . . . . . . A-6
Electrical Considerations . . . . . . 2-6
Electro Magnetic Compatibility . . B-2
Electronics
Trim . . . . . . . . . . . . . . . . . 3-20
EMC . . . . . . . . . . . . . . . . . . . . B-2
Empty Pipe . . . . . . . . . . . . . . . 3-13
Enclosure Ratings . . . . . . . . . . . A-2
Environmental Considerations . . 2-3
European Pressure Equipment
Directive . . . . . . . . . . . . . . . . . . B-1
F
Failure Alarm Mode . . . . . . . . . . .2-4
Fast Key
Feature . . . . . . . . . . . . . . .3-28
Fast Keys . . . . . . . . . . . . . . . .3-24
Filter Mode . . . . . . . . . . . . . . . .3-15
Flange Bolts . . . . . . . . . . . . . . . .4-7
Flanges
Class 150 . . . . . . . . . . . . . 4-11
Class 300 . . . . . . . . . . . . . 4-11
Flow Direction . . . . . . . . . . 4-5, 4-6
Flow Rate
Units . . . . . . . . . . . . . . . . . .3-7
Flowtube
Connections . . . . . . . . . . .2-12
Orientation . . . . . . . . . . . . . .4-4
Test . . . . . . . . . . . . . . . . . .5-8
Flowtube Compensation . . . . . . A-4
Flowtube Serial Number . . . . . .3-17
Flowtube Tag . . . . . . . . . . . . . .3-17
Flowtubes
Brooks Model 5000 . . . . . . D-7
Endress and Hauser Models D-6
Fischer and Porter
Model 10D1418 . . . . . . . D-10
Foxboro Series 1800 . . . . D-16
Generic Flowtube . . . . . . . D-27
Kent Flowtubes . . . . . . . . D-21
Kent Veriflux VTC . . . . . . . D-20
Krohne Flowtubes . . . . . . D-22
Rosemount
Model 8705/8707/8711 . . . D-3
Taylor Series 1100 . . . . . . D-23
Yamatake Honeywell
Flowtubes . . . . . . . . . . . D-25
Yokogawa Flowtubes . . . . D-26
Function Keys
Handheld Communicator . . .3-27
Reference Manual
00809-0100-4661, Rev AA
3/10/04
Rosemount 8712D
G
Gaskets . . . . . . . . . . . . .
Installation
Wafer Flowtube . .
Ground Connection
Internal . . . . . . . . . . .
Protective . . . . . . . . .
Grounding . . . . . . . . . . . .
Grounding Electrodes
Grounding Rings . . . .
Lining Protectors . . . .
Process Grounding . .
. . . . . 4-7
. . . . 4-10
. . . . 4-13
. . . . 4-13
. . . . 4-12
. . . . 4-13
. . . . 4-13
. . . . 4-13
. . . . 4-12
L
H
Handheld Communicator
Action Keys . . . . . . .
Alphanumeric Keys .
Basic Features . . . .
Connections . . . . . .
Data Entry . . . . . . .
Diagnostic Messages
Function Keys . . . . .
Functions . . . . . . . .
Hardware . . . . . . . .
Main Menu . . . . . . .
Menu Tree . . . . . . .
Menus . . . . . . . . . .
Online Menu . . . . . .
Shift Keys . . . . . . . .
Hazardous Locations
Certifications
Model 8705/8707 . . .
Housing, Materials of
Construction . . . . . . . . .
Humidity Limits . . . . . . .
. . . . . 3-22
. . . . . 3-26
. . . . . 3-27
. . . . . 3-26
. . . . . 3-25
. . . . . 3-27
. . . . . 3-30
. . . . . 3-27
. . . . . 3-28
. . . . . 3-25
. . . . . 3-28
. . . . . 3-23
. . . . . 3-28
. . . . . 3-29
. . . . . 3-27
Line Power Fuses . . . . . . . . . . . A-6
Line Size . . . . . . . . . . . . . . . . . 3-8
Lining Protectors
Grounding . . . . . . . . . . . . 4-13
Load Resistor Requirements . . 2-10
Local Operator Interface (LOI)
Diagnostic Messages . . . . . 3-6
Examples . . . . . . . . . . . . . . 3-4
LOI Keys
Data Entry . . . . . . . . . . . . . 3-3
Display Control . . . . . . . . . . 3-3
Function Definition . . . . . . . 3-5
Keys And Functions . . . . . . 3-5
Totalizer . . . . . . . . . . . . . . . 3-3
Transmitter Parameter . . . . . 3-3
Low Flow Cutoff . . . . . . . 3-15, A-4
Lower Range Value (LRV) . . . . . 3-8
. . . . . . B-3
. . . . . . A-6
. . . . . . A-2
I
Installation
Auxiliary Output . . . . . . . . . 2-11
Category . . . . . . . . . . . . . . 2-8
Conduit Connections . 2-6, 2-14
Connect 4-20 mA Loop
External Power Source . . . 2-9
Considerations . . . . . . . . . . 2-8
Diagram
Cable Preparation . . . . 2-14
Environmental
Considerations . . . . . . . . . 2-3
Flowtube Connections . . . . 2-12
Mechanical Considerations . . 2-2
Mounting . . . . . . . . . . . . . . 2-3
Options . . . . . . . . . . . . . . . 2-8
Positive Zero Return . . . . . 2-12
Procedures . . . . . . . . . . . . . 2-3
Process Leak
Containment . . . . . . . . 4-17
Index-2
Process Leak Protection
(Optional) . . . . . . . . . . . . B-3
Pulse Output . . . . . . . . . . 2-10
Relief Valves . . . . . . . . . . 4-17
Safety Messages . . . . . 2-1, 4-1
Wafer Flowtube . . . . 4-10, 4-12
Alignment and Bolting . 4-10
Flange Bolts . . . . . . . . 4-11
Gaskets . . . . . . . . . . . 4-10
Installation Category . . . . . . . . . 2-8
Internal
Ground Connection . . . . . . 4-13
M
Materials of Construction . . . . . . A-6
Maximum Power Requirement . 2-10
Mechanical Considerations . . 2-2, 2-6
Menu
Handheld Communicator . . 3-28
Tree . . . . . . . . . . . . . . . . 3-23
Messages
Safety . . . . . . . . . . . . . . . . 1-2
Mounting . . . . . . . . . . . . . . . . . 2-3
Multidrop Communications . . . . 3-22
HART Communications . . . 3-22
N
NiCad Recharger . . . . . . . . . . 3-25
North American Response
Center . . . . . . . . . . . . . . . . . . . 1-2
Number of Samples . . . . . . . . . 3-16
O
Options . . . . . . . . . . .
Ordering Information . .
Orientation
Flowtube . . . . . . .
Output
Power . . . . . . . . .
Trim . . . . . . . . . .
Output Signals . . . . . .
Output Test
Analog . . . . . . . .
Pulse . . . . . . . . .
Output Testing . . . . . .
Overcurrent Protection
. . . . . . . .2-4
. . . . . . . A-8
. . . . . . . .4-4
. . . . . . . .2-4
. . . . . . .3-19
. . . . . . . A-3
. . . . . . . .5-6
. . . . . . . .5-6
. . . . . . . A-3
. . . . . . . .2-8
P
Paint, Materials of Construction . A-6
PED . . . . . . . . . . . . . . . . . . . . B-1
Performance Specifications . . . . A-5
Physical Specifications . . . . . . . A-6
Piping . . . . . . . . . . . . . . . . . . . .4-4
Positive Zero Return . . . . . 2-12, A-3
Power
Source . . . . . . . . . . . . . . . .2-9
Pressure Equipment Directive . . B-1
Process Grounding . . . . . . . . . .4-12
Process Leak
Containment . . . . . . . . . . .4-17
Protection . . . . . . . . . . . . . B-3
Process Variables . . . . . . . . . . . .3-6
Protection
Overcurrent . . . . . . . . . . . . .2-8
Protective
Ground Connection . . . . . .4-13
Pulse Duration Requirements . . .2-10
Pulse Output . . . . . . . . . . . . . .2-10
Test . . . . . . . . . . . . . . 5-6, A-3
Pulse Output Scaling . . . . . . . . . .3-9
Pulse Width . . . . . . . . . . . . . . .3-10
PZR . . . . . . . . . . . . . . . . . . . .2-12
R
Relief Valves . . .
Repeatability . . .
Response Time .
Review Variables
RFI Effect . . . . .
. . . . . . . . . . .4-17
. . . . . . . . . . . A-5
. . . . . . . . . . . A-5
. . . . . . . . . . .3-17
. . . . . . . . . . . A-5
Reference Manual
00809-0100-4661, Rev AA
3/10/04
S
Safety Messages . . . . . . . . . . . . 1-2
Scalable Frequency Adjustment . A-3
Security . . . . . . . . . . . . . . . . . . 2-4
Self Test . . . . . . . . . . . . . . . . . . 5-6
Serial Number
Flowtube . . . . . . . . . . . . . 3-17
Shift Keys
Handheld Communicator . . 3-27
Signal Processing . . . . . . . . . . .C-2
Signal Processing Control . . . . . 3-16
Simulate Alarm . . . . . . . . . . . . 3-19
Software
Lockout . . . . . . . . . . . . . . . A-3
Special Units . . . . . . . . . . . . . . 3-12
Specifications
Functional Specifications
Ambient Temperature
Limits . . . . . . . A-2
Conductivity Limits . . . . A-2
Damping . . . . . . . . . . . A-4
Enclosure Ratings . . . . . A-2
Flow Rate Range . . . . . A-1
Flowtube Coil
Resistance . . . A-1
Flowtube Compatibility . . A-1
Flowtube
Compensation . A-4
Humidity Limits . . . . . . . A-2
Installation
Coordination . . A-2
Low Flow Cutoff . . . . . . A-4
Output Signals . . . . . . . A-3
Output Testing . . . . . . . A-3
Positive Zero Returns . . A-3
Power Consumption . . . A-2
Power Supply . . . . . . . . A-2
Software Lockout . . . . . A-3
Start-up Time . . . . . . . . A-4
Turn-on Time . . . . . . . . A-4
Model 8705 and Model 8707
hazardous locations . . . B-3
Performance Specifications . A-5
Accuracy . . . . . . . . . . . A-5
Ambient Temperature
Effect . . . . . . . A-5
Repeatability . . . . . . . . A-5
Response Time . . . . . . . A-5
RFI Effect . . . . . . . . . . . A-5
Stability . . . . . . . . . . . . A-5
Supply Voltage Effect . . A-5
Vibration Effect . . . . . . . A-5
Rosemount 8712D
Physical Specifications . . . . A-6
Electrical Connections . A-6
Line Power Fuses . . . . . A-6
Materials of
Construction . . A-6
Stability . . . . . . . . . . . . . . . . . . A-5
Start-up Time . . . . . . . . . . . . . . A-4
Storage . . . . . . . . . . . . . . . . . . A-2
Supply Voltage
Requirements . . . . . . . . . . 2-10
Supply Voltage Effect . . . . . . . . . A-5
Switches . . . . . . . . . . . . . . . . . 2-4
Changing Settings . . . . . 2-4, 2-5
Closure Requirements . . . . 2-10
Failure Alarm Mode . . . . . . . 2-4
T
Tag . . . . . . . . . . . . . . . . . . . . . 3-6
Flowtube . . . . . . . . . . . . . 3-17
Temperature . . . . . . . . . . . . . . . A-2
Time Limit . . . . . . . . . . . . . . . . 3-16
Totalizer . . . . . . . . . . . . . . . . . 3-14
Transmitter Output Instability
Auto Zero . . . . . . . . . . . . . . C-2
Procedures . . . . . . . . . . . . C-2
Signal Processing . . . . . . . . C-2
Transmitter Security . . . . . . . . . . 2-4
Transmitter Tag . . . . . . . . . . . . 3-17
Transporting System . . . . . . . . . 4-3
Trim . . . . . . . . . . . . . . . . . . . . 3-19
Troubleshooting
Advanced (Transmitter) . . . . 5-4
Installed Flowtube Tests . . . . 5-7
Process Noise . . . . . . . . . . 5-7
Uninstalled Flowtube Tests . . 5-9
Wiring Errors . . . . . . . . . . . 5-7
Turn-on Time . . . . . . . . . . . . . . A-4
W
Weight . . . . . . . . . . . . . . . . . . . A-6
Wiring
Conduit Ports and Connections .
2-5
Dedicated Conduit . . . . . . .2-12
Installation Category . . . . . . .2-8
Wiring Diagrams
Brooks Model 5000 . . . . . . D-7
Endress and Hauser
Models . . . . . . . . . . . . . . D-6
Fisher and Porter
Model 10D1418 . . . . . . . D-10
Foxboro Series 1800 . . . . D-16
Generic Flowtube . . . . . . . D-27
Kent Flowtubes . . . . . . . . D-21
Kent Verifulx VTC . . . . . . . D-20
Krohne Flowtubes . . . . . . D-22
Rosemount
Model 8705/8707/8711 . . . D-3
Taylor Series 1100 . . . . . . D-23
Yamatake Honeywell
Flowtubes . . . . . . . . . . . D-25
Yokogawa Flowtubes . . . . D-26
U
Universal Auto Trim . . . . . . .
Upper Range Value (URV) . .
Upstream/Downstream Piping
Accuracy
Ensuring . . . . . . . .
User-Defined Flow Unit . . . .
. . 3-21
. . . 3-7
. . . 4-4
. . . 4-4
. . 3-13
V
Vibration Effect . . . . . . . . . . . . . A-5
Index-3
Reference Manual
Rosemount 8712D
Index-4
00809-0100-4661, Rev AA
3/10/04
Reference Manual
Rosemount 8712D
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
Emerson Process Management
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317 USA
T (U.S.) 1-800-999-9307
T (International) (952) 906-8888
F (952) 949-7001
Emerson Process Management
Emerson Process Management Flow
Wiltonsraat 30
3905 KW Veenendaal
The Netherlands
T 31 (0) 318 495 555
F 31 (0) 318 495 556
www.rosemount.com
¢00809-0100-4661)¤
© 2004 Rosemount Inc. All rights reserved.
00809-0100-4661, Rev AA
March 2004
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