Rosemount 8712D Series User manual

www.rosemount.com
¢00825-0100-4729j¤
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003 Rosemount 8712D / 8700 Series
Rosemount Magnetic Flowmeter
Systems (Transmitter and Flowtube)
Start
Step 1: Pre-Installation
Step 2: Wiring
Step 3: Basic Configuration
Step 4: Handling
Step 5: Mounting
Step 6: Installation (Flanged Flowtubes)
Step 6: Installation (Wafer Flowtubes)
Step 6: Installation (Sanitary Flowtubes)
Step 7: Grounding
Product Certificates
Step 8: Process Leak Protection (Optional)
Step 9: Power up the Transmitter
Step 10: Check Process Connections
Step 11: Confirm Configuration
End
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Rosemount 8712D / 8700 Series
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003
© 2003 Rosemount Inc. All rights reserved. All marks property of owner.
IMPORTANT NOTICE
This installation guide provides basic guidelines for the
Rosemount®8712D. It does not provide instructions for detailed
configuration, diagnostics, maintenance, service and
troubleshooting installations. Refer to the 8712D reference manual
(document number 00809-0100-4661) for more instruction. The
manual and this QIG are also available electronically on
www.rosemount.com.
WARNING
Failure to follow these installation guidelines could result in
death or serious injury:
Installation and servicing instructions are for use by qualified
personnel only. Do not perform any servicing other than that
contained in the operating instructions, unless qualified. Verify that
the operating environment of the flowtube and transmitter is
consistent with the appropriate FM or CSA approval.
Do not connect a Rosemount 8712D to a non-Rosemount flowtube
that is located in an explosive atmosphere.
Rosemount Inc.
12001 Technology Drive
Eden Prairie, MN USA
55344
T (US) [phone]
T (Intnl) [phone]
F [phone]
Emerson Process Management
Wiltonstraat 30
3905 KW Veenendaal
The Netherlands
T [phone]
F [phone]
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Quick Installation Guide
00825-0100-4661, Rev AA
November 2003 Rosemount 8712D / 8700 Series
WARNING
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be
in accordance with the appropriate local, national, and international
standards, codes, and practices. Please review the approvals
section of the 8712D reference manual for any restrictions
associated with a safe installation.
• Before connecting a HART-based communicator in an explosive
atmosphere, make sure the instruments in the loop are installed
in accordance with intrinsically safe or non-incendive field wiring
practices.
Electrical shock can result in death or serious injury
• Avoid contact with the leads and terminals. High voltage that
may be present on leads can cause electrical shock.
WARNING
The flowtube liner is vulnerable to handling damage. Never place
anything through the flowtube for the purpose of lifting or gaining
leverage. Liner damage can render the flowtube useless.
To avoid possible damage to the flowtube liner ends, do not use
metallic or spiral-wound gaskets. If frequent removal is anticipated,
take precautions to protect the liner ends. Short spool pieces
attached to the flowtube ends are often used for protection.
Correct flange bolt tightening is crucial for proper flowtube operation
and life. All bolts must be tightened in the proper sequence to the
specified torque limits. Failure to observe these instructions could
result in severe damage to the flowtube lining and possible flowtube
replacement.
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Rosemount 8712D / 8700 Series
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003
STEP 1: PRE-INSTALLATION
Before installing the Rosemount 8712D Magnetic Flowmeter
Transmitter, there are several pre-installation steps that should be
completed to make the installation process easier:
• Identify the options and configurations that apply to
your application
• Set the hardware switches if necessary
• Consider mechanical, electrical, and environmental requirements
Mechanical Considerations
The mounting site for the Rosemount 8712D transmitter should
provide enough room for secure mounting, easy access to conduit
ports, full opening of the transmitter covers, and easy readability of the
LOI screen (see Figure 1). The transmitter should be mounted in an
manner that prevents moisture in conduit from collecting in the
transmitter.
The 8712D is mounted separately from the flowtube, it
is not subject to limitations that might apply to the flowtube.
Figure 1. Rosemount 8712D Dimensional Drawing
4.31
(109)
LOI Cover
Standard
Cover 3.51
(89)
2.96
(75)
11.15
(283)
3.11
(79)
12.02
(305)
0.44
(11)
With LOI Cover
9.01
(229) 2.81
(71)
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Quick Installation Guide
00825-0100-4661, Rev AA
November 2003 Rosemount 8712D / 8700 Series
Environmental Considerations
To ensure maximum transmitter life, avoid excessive heat and
vibration. Typical problem areas:
• high-vibration lines with integrally mounted transmitters
• warm-climate installations in direct sunlight
• outdoor installations in cold climates.
Remote-mounted transmitters may be installed in the control room to
protect the electronics from the harsh environment and provides easy
access for configuration or service.
Rosemount 8712D transmitters require external power and there must
be access to a suitable power source.
Installation Procedures
Rosemount 8712D installation includes both detailed mechanical and
electrical installation procedures.
Mount the Transmitter
At a remote site the transmitter may be mounted on a pipe up to two
inches in diameter or against a flat surface.
Pipe Mounting
To mount the transmitter on a pipe:
1. Attach the mounting plate to the pipe using the mounting hardware.
2. Attach the 8712D to the mounting plate using the mounting screws.
Surface Mounting
To surface mount the transmitter:
1. Attach the 8712D to the mounting location using the mounting
screws.
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Rosemount 8712D / 8700 Series
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003
Identify Options and Configurations
The standard application of the 8712D includes a 4–20 mA output and
control of the flowtube coils. Other applications may require one or
more of the following configurations or options:
• Multidrop Communications
• PZR (Positive Zero Return)
• Auxiliary Output
• Pulse Output
Additional options may apply. Be sure to identify those options and
configurations that apply to your situation, and keep a list of them
nearby for consideration during the installation and configuration
procedures.
Hardware Jumpers/Switches
The 8712D electronics board is equipped with
three user-selectable hardware switches. These switches set the
Failure Alarm Mode, Internal/External Analog Power, and Transmitter
Security. The standard configuration for these switches when shipped
from the factory are as follows:
Changing Hardware Switch Settings
In most cases, it is not necessary to change the setting of the
hardware switches. If you need to change the switch settings,
complete the steps outlined in the manual.
Electrical Considerations
Before making any electrical connections to the 8712D, consider the
following standards and be sure to have the proper power supply,
conduit, and other accessories.
Failure Alarm Mode: HIGH
Internal/External Analog Power: INTERNAL
Transmitter Security: OFF
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Quick Installation Guide
00825-0100-4661, Rev AA
November 2003 Rosemount 8712D / 8700 Series
STEP 2: WIRING
Conduit Ports and Connections
Both the flowtube and transmitter junction boxes have ports for ¾-inch
NPT conduit connections. These connections should be made in
accordance with local or plant electrical codes. Unused ports should
be sealed with metal plugs. Proper electrical installation is necessary
to prevent errors due to electrical noise and interference. Separate
conduits are not necessary for the two cables, but a dedicated conduit
line between each transmitter and flowtube is required. Shielded cable
must be used for best results in electrically noisy environments.
Conduit Cables
Run the appropriate size cable through the conduit connections in your
magnetic flowmeter system. Run the power cable from the power
source to the transmitter. Run the coil drive and electrode cables
between the flowmeter and transmitter. Prepare the ends of the coil
drive and electrode cables as shown in Figure 2. Limit the unshielded
wire length to 1-inch on both the electrode and coil drive cables.
Excessive lead length or failure to connect cable shields can create
electrical noise resulting in unstable meter readings.
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Rosemount 8712D / 8700 Series
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003
Step 2.1 Transmitter Coil Input
This wiring section covers supplying power to the flowtube coils
through the transmitter. The transmitter coil input power sends a
pulsed DC frequency to the flowtube.
Figure 2. Cable Preparation Detail
Figure 3. Transmitter Power Connections
8705_0041a.eps
NOTE
Dimensions are in
inches (millimeters).
1.00
(26)
Cable Shield
8712/8712e01c.eps
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Quick Installation Guide
00825-0100-4661, Rev AA
November 2003 Rosemount 8712D / 8700 Series
Wire the transmitter according to local electrical requirements. Ground
the transmitter cage via the threaded conduit connection (see
Figure 2). For ac power applications, connect ac Neutral to terminal N
and connect ac Line to terminal L1. For dc power applications,
properly connect the positive and negative terminals. Units powered
by 12-42 V dc power supply may draw up to 1 amp of current. In
addition, follow the supply wire and disconnect requirements below:
Supply Wire Requirements
Use 12 to 18 AWG wire rated for the proper temperature application.
For connections in ambient temperatures above 140 °F (60 °C), use a
wire rated for at least 176 °F (80 °C). For ambients greater than 176 °F
(80 °C), use a wire rated for at least 230 °F (110 °C).
Disconnects
Connect the device through an external disconnect or circuit breaker.
Clearly label the disconnect or circuit breaker and locate it near
the transmitter and per local electrical control.
Figure 4. Power Supply Current
1.0
0.8
0.6
0.4
0.2
0
010 20 30 40 50
Power Supply (Volts)
Supply Current (Amps)
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Rosemount 8712D / 8700 Series
Quick Installation Guide
00825-0100-4661, Rev AA
November 2003
Installation Category
The installation category for the Rosemount 8712D is (Overvoltage)
Category II.
Overcurrent Protection
The Rosemount 8712D Flowmeter Transmitter requires overcurrent
protection of the supply lines. Maximum ratings of overcurrent devices
are as follows:
Requirements for 115 V ac or 230 V ac Power Supply
Wire the transmitter according to local electrical requirements for
90 - 250 V AC. In addition, follow the supply wire and disconnect
requirements below:
Requirements for 12-42 V dc Power Supply
Units powered with 12-42 V DC may draw up to 1 amp of current. As a
result, the input power wire must meet certain gauge requirements.
For combinations not shown, you can calculate the maximum distance
given the supply current, the voltage of the source, and the minimum
start-up voltage of the transmitter, 12 V DC, using the following
equation:
Power
System Fuse Rating Manufacturer
12-42 V DC 250 V; 3 Amp, Quick Acting Bussman AGCI or Equivalent
90-250 V AC 250 V; 1 Amp, Quick Acting Bussman AGCI or Equivalent
MaximumResis cetan SupplyVoltage 12Vdc–
SupplyCurrent
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