Introduction; General; Signal Converters; Figure 1-1. Typical 10Ds3111A Magnetic Flowmeter - ABB 3000 Series Instruction Manual

10DS3111A INSTRUCTION MANUAL

1.0 INTRODUCTION

1.1 General

The Series 10DS3111 COPA-AC mag-
netic flowmeter is an electromagnetic
liquid flow rate detector. The meter
uses the characteristics of a conduc-
tive liquid to generate an induced volt-
age, directly proportional to flow rate,
as the liquid passes internal elec-
trodes. The resultant voltage is ap-
p l i ed to a s o l i d s tate el ectr onic s
package that conditions it to an output
signal compatible with conventional
receiving equipment.
The flowmeter's design provides a low
power, obstructionless metering ele-
ment 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, reducing or
conserving pressure source require-
ments as compared to other metering
methods. The meter requires no addi-
FIGURE 1-1. TYPICAL 10DS3111A
tional support other than that used on
MAGNETIC FLOWMETER
normal 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.
Figure 1-1 shows the general configuration of a typical meter while Figure 1-2 shows the meter's
electronics housing with the cover removed.

1.2 Signal Converters

The 10DS3111 COPA-AC magnetic flowmeter has been designed for operation with AC driven
magnet coils. This design requires a 50/60 Hz reference and zero assembly, which is integrally
mounted in the flowmeter electronics housing. The signal converter must be remotely mounted
and is supplied in an enclosure suitable for either wall, panel, or pipe mounting.
1-1