Function And System Design; Measuring Principle; Measuring System; Input - Endress+Hauser Proline Promag 10D Technical Information

Proline Promag 10D

Measuring principle

Measuring system

Measured variable

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 fluid 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 10
(key operation, two-line, unilluminated display)
Sensor:
• Promag D as wafer version
DN 25 (1"), 40 (1 ½"), 50 (2"), 65 (–), 80 (3"), 100 (4")
• Promag D with threaded connection
DN 25 (1"), 40 (1 ½"), 50 (2")

Input

Flow velocity (proportional to induced voltage)
Ue
I
V
B
I
L
a0003191
3