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Industrial Gaussmeter IGM11 Operating Instructions
Chapter 3 Function of the Gaussmeter
This implies:
with
n
e
e
w
t
B
This represents the idealized Hall effect.
In reality, the results deviate from this idealized effect.
Since there is a linear equation between the current and the measuring result, it fol-
lows:
3.1.2 Non-linear Properties of the Hall Probe
In contrast to the idealized description, you find a non-linear behavior:
For the used Hall sensor the real description is true for flux densities up to about
5000 mT.
3.1.2.1 Reasons for the Occurrence of R
The strongest deviation from the idealized Hall effect is the occurance of an offset
voltage without a magnetic field. This effect is mainly caused by geometric asymme-
tries of the Hall element.
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U
Charge carriers
Elementary charge of the electron (1.6022 10
Width of the path on which the electrons move
Effective force of the Hall element
Flux density in [Tesla]
R
Hall
R
S
Hall
0
I
1
B
Hall
n
e
t
e
1
B
S
B
0
n
e
t
e
2
B
1
B
R
HALL
offset
-19
As)
offset
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