External Static Magnetic Fields - MAGSYS IGM11 Operating Instructions Manual

Industrial Gaussmeter IGM11 Operating Instructions
Chapter 3 Function of the Gaussmeter

3.2.4 External Static Magnetic Fields

Particularly in sensitive measuring ranges, an external static magnetic field, as e.g. the
Earth's field, can already become clearly noticeable. These external magnetic fields lead
to a corruption of the measuring result.
To compensate external magnetic stray fields or asymmetries of the Hall probe, the
device can be reset.
For this purpose please hold the measuring probe into a field-free area, e.g. a zero
Gauss chamber, or orient the measuring probe in a free field in east-west direction and
activate the null balance.
The values are stored so that this balancing has to be carried out only in seldom cases.
If the magnetic field is too high during the automatic balancing, the correction is stopped
with an error message.
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