Azbil MagneW Two-wire PLUS+ MTG15A, User Manual

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1-2
1-1. System configuration
Measuring system
Introduction
This instrument is a two-wire electromagnetic flowmeter operated on 4-20mA DC. It
measures the flow rate of conductive fluid flowing in the detector and outputs a signal that is
suitable for the measuring range.
Concept of flow rate measurement by this instrument
The concept of a flow rate measuring system using this instrument is shown.
Fluid
Output
signal
Analog output
Pulse output
De output
Contact output
Fig. 1-1. Conceptual drawing of measuring system (integral type)
Analog output
If instantaneous flow rate values are to be output as an analog variable to control equipment,
configure the system to output an analog output.
Digital output (DE output)
Use this system configuration if instantaneous flow rate values, instrument database and self-
diagnosis results are to be outputted as digital variables (DE outputs) to control equipment.
Pulse output
As a pulse output, the open-collector output is available. Pulse frequencies up to 200 Hz can be
outputted. The pulse output can be outputted simultaneously with an analog output.
If integrated flow values are to outputted as a pulse to control equipment, wire an another two-
wire to output a pulse output.
Contact output
Instead of the pulse output, a contact output the open-collector output is available. The
contact output can be outputted simultaneously with an analog output.