System Description; Section 1 Introduction - Emerson Rosemount 8742C Reference Manual

Reference Manual
00809-0100-4793, Rev CA
August 2004
Section 1

SYSTEM DESCRIPTION

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Introduction
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3
Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3
®
The Rosemount 8700 Series Magnetic Flowmeter System combines
separate flowtube and transmitter units, 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 three Rosemount magnetic flowmeter flowtubes:
• Flanged Rosemount 8705
• Flanged High-Signal Rosemount 8707
• Wafer-Style Rosemount 8711
• Sanitary 8721
There are three Rosemount magnetic flowmeter transmitters:
• Rosemount 8712D/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
Rosemount 8742C Magnetic Flowmeter Transmitter with F
fieldbus and 8700 Series Magnetic Flowmeter Flowtubes.
Attempting to install and operate the Rosemount 8705, 8707 High-Signal,
or 8711 Magnetic Flowmeter Flowtubes with the Rosemount 8712D/H,
8732, or 8742 Magnetic Flowmeter Transmitter without reviewing the instructions
contained in this manual could result in personal injury or equipment damage.
Rosemount 8742C
OUNDATION
™