Rosemount 8712, Reference Manual

Page: 12 / 212

Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
2-2
TRANSMITTER
SYMBOLS
Caution symbol — check product documentation for details
Protective conductor (grounding) terminal
PRE-INSTALLATION
Before installing the Rosemount 8712 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 8712 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 the
conduit from collecting in the transmitter.
The 8712 is mounted separately from the sensor, it
is not subject to limitations that might apply to the sensor.
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 8712 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 sensor liner is vulnerable to handling damage. Never place anything through the sensor
for the purpose of lifting or gaining leverage. Liner damage can render the sensor useless.
To avoid possible damage to the sensor 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 sensor ends are often used for protection.
Correct flange bolt tightening is crucial for proper sensor 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 sensor lining and possible sensor
replacement.