Gaussmeter IGM11 Operating Instructions
Chapter 2 Brief Introduction
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MAGSYS
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Version 01/2013
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2
Brief Introduction
Measurements with the gaussmeter utilize the Hall effect as principle of
measurement. A Hall sensor is a symmetric current-carrying semiconductor. A
magnetic field running perpendicular through this element generates an asymmetry
on the chip and thereby creates an output voltage which, at first approximation, is
proportional to the product of magnetic field strength and forced current. For
higher magnetic field strengths, this correlation is no longer linear. This effect is
automatically compensated in the device. Thus, the gaussmeter measures the
magnetic flux density at a point with a high local resolution. It only measures those
components of the magnetic flux density which run perpendicularly through the
sensor.
2.1
Preparing a Measurement
For measurements you need to connect a measuring probe.
A suitable measuring probe can be connected via the 8 mm socket on the top of the
device. Each measuring probe is individually calibrated. The calibration data are
stored in the probe memory. When a measuring probe is plugged in or changed,
these parameters will be read automatically.
2.2
Running a Measurement
After switching on the device, the actual measured value is shown continuously. In
addition to this, the display shows further information on the device status, the
selected measuring range as well as the measuring mode.
•
The measuring range, the physical display unit and the measuring mode can be
adjusted in the set-up menu.
•
After setting the desired measuring range and unit, insert the probe into the
magnetic field. Especially for heterogeneous magnetic fields, such as they
appear on the surfaces and edges of magnets, pay attention that the measured
magnetic flux density strongly depends on the distance and position. Further
take into consideration that the magnetic field component is only measured in
one direction so that tilting the measuring probe might lead to an error.
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