Endress+Hauser Proline Promag H 200 Technical Information page 4

4
Ue Induced voltage
B Magnetic induction (magnetic field)
L Electrode spacing
I Current
v Flow velocity
In the electromagnetic measuring principle, the flowing medium is the moving conductor. The
voltage induced (U ) is proportional to the flow velocity (v) and is supplied to the amplifier by means
e
of two measuring electrodes. The flow volume (Q) is calculated via the pipe cross-section (A). The DC
magnetic field is created through a switched direct current of alternating polarity.
Formulae for calculation
• Induced voltage U = B · L · v
e
• Volume flow Q = A · v
U
e
I
v
B
I
L
Proline Promag H 200
A0017035
Endress+Hauser