Function And System Design; Measuring Principle; Measuring System - Endress+Hauser Proline Promag 50H Manual

Proline Promag 50H, 53H

Measuring principle

Measuring system

Endress+Hauser

Function and system design

Following Faraday's law of magnetic induction, a voltage is induced in a conductor moving through a magnetic
field.
In the electromagnetic measuring principle, the flowing medium is the moving conductor.
The voltage induced is proportional to the flow velocity and is supplied to the amplifier by means
of two measuring electrodes. The flow volume is calculated by means of the pipe cross-sectional area.
The DC magnetic field is created through a switched direct current of alternating polarity.
Ue = B · L · v
Q = A · v
Ue Induced voltage
B Magnetic induction (magnetic field)
L Electrode spacing
v Flow velocity
Q Volume flow
A Pipe cross-section
I Current strength
The measuring system consists of a transmitter and a sensor.
Two versions are available:
• Compact version: Transmitter and sensor form a mechanical unit.
• Remote version: Sensor is mounted separate from the transmitter.
Transmitter:
• Promag 50 (user interface with push buttons for operation, two-line display, illuminated)
• Promag 53 ("Touch Control" without opening the housing, four-line display, unilluminated)
Sensor:
• Promag H (DN 2 to 100 / 1/12 to 4")
Ue
I
V
B
I
L
A0003191
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