Introduction; General; Description; Construction - ABB COPA-XM 3000 Series Instruction Manual

Series 10DX3000 Magnetic Flowmeter Instruction Manual

1.0 INTRODUCTION

1.1 General

1.1.1 Description

The Series 3000 Magnetic Flowmeter is a compact, volumetric, liquid flow rate detector that uses as
the process transducing method the characteristic of a conductive liquid to generate an induced
voltage when flowing through a magnetic field. The amplitude of the voltage produced is directly
proportional to the flow rate of the metered liquid.
Being a completely obstructionless metering instrument, the Series 3000 Magnetic Flowmeter can be
used to meter liquids without regard to heterogeneous consistency and is as independent of the
tendency to plug or foul as the pipeline in which it is mounted. An inherent advantage of obstruction-
less construction is that pressure losses are reduced to levels occurring in equivalent lengths of
equal diameter pipeline. This reduces or conserves pressure source requirements in new or existing
hydraulic lines as compared to other metering methods. The compact size of the meter results in a
light-weight unit which requires no additional support other than that used normally on pipe runs.
Short laying lengths minimize the need for altering existing pipe runs to accommodate metering. A
basic construction of corrosive resistant wetted parts and a variety of meter lining materials permit
metering of most corrosive and reactant liquids.
Factors such as liquid viscosity and density require no compensation and have no effect on the
measurement accuracy of the Magnetic Flowmeter. Metering limitations are confined to a minimum
threshold of electrical conductivity inherent to the liquid being metered. The degree of liquid conduc-
tivity has no effect upon metering accuracy as long as it is greater than this minimum level. Liquid
temperature is limited only to the extent that it may affect liquid conductivity and, like liquid pressure,
to the extent that it can not exceed the meter material specification limits.
The associated electronics package is called the Signal Converter and may be either integrally or
remotely mounted. Either an analog or a microprocessor signal converter may be used with the
Series 3000 Magnetic Flowmeter. The Flowmeter without the electronic package is used with a
remote mounted Signal Converter. A remotely mounted Signal Converter is recommended for any or
all of the following conditions:
• if the summation of ambient and process temperature is greater than 262
o
(110 C) for COPA-XM, the Signal Converter must be remotely mounted.
• vibrations above the specification given in Section 1.3
The Signal Converter also contains a magnet driver unit that is used to power the meter's magnet
coils. The steady bipolar state magnetic field principle, referred to as the MAG-X
provides optimum zero point stability at an optimized drive frequency.
For information concerning the Signal Converter, refer to the Signal Converter Instruction Manual.

1.1.2 Construction

The Series 3000 Magnetic Flowmeter consists of a flanged, stainless steel pipe spool which serves
as a meter body. A pair of flat magnet coils fit on opposite sides of the meter housing inner surface.
Permeable iron straps and pole pieces focus the magnetic field generated by the coils and provide a
flux return path.
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design concept,
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