Introduction; General - ABB MINI-MAG 10D1475 Series Instruction Manual

10D1475 MINI-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL

1.0 INTRODUCTION

1.1 General

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The Series 10D1475 MINI-MAG Magnetic Flowmeter is an electromagnetic liquid flow rate detector.
The meter uses the characteristics of a conductive liquid to generate an induced voltage, directly
proportional to flow rate, as the liquid passes internal electrodes. The resultant voltage is applied to
a solid state electronics package that conditions it to an output signal compatible with conventional
receiving equipment.
The meter's design provides a compact, very low power, obstructionless primary metering element
that bolts between flanges in a process pipeline. Pressure losses in this type of meter are reduced to
levels occurring in equivalent lengths of equal diameter pipeline, thus reducing or conserving pres-
sure source requirements as compared to other metering methods. The compact size of the meter
results in a light-weight unit that requires no additional support other than that used normally on pipe
runs.
This Flowmeter can be used to meter either clean or dirty liquids. The meter may be used with many
non-homogeneous liquids and is as independent of the tendency to plug or foul as the pipeline in
which it is mounted. By design, only the liner and electrodes are wetted parts and will accommodate
most acids, bases, water and aqueous solutions.
Viscosity and density of the metered liquid have no effect on the measurement accuracy of the meter
and, therefore, signal compensation is not required. 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 the metering accuracy (as long as it is greater than the minimum level). The
liquid temperature and pressure are limited only to the meter material specification limit.
With the exception of the primary board, the meter body is a sealed section that bolts between the
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customer's pipe line flanges. The body has a TEFZEL (ETFE) liner which is turned out against the
flange faces. The measuring electrodes that contact the process liquid have their ends flush with the
inside of the liner. For accurate results, the meter bore diameter must be centered in the pipeline. For
the larger size meters, spacer sleeves are slipped over the flange mounting bolts. The smaller size
meters use a unique centering device (called a flange adaptor) to center the meter.
FIGURE 1-1. INTEGRAL FIGURE 1-2. INTEGRAL/REMOTE
10D1475J FLOWMETER 10D1475S FLOWMETER
INTRODUCTION 1-1