Brief Introduction; Preparing A Measurement; Running A Measurement - MAGSYS IGM11 Operating Instructions Manual

Industrial Gaussmeter IGM11 Operating Instructions
Chapter 2 Brief Introduction

Brief Introduction

Measurements with the gaussmeter utilize the Hall effect as principle of measure-
ment. 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 com-
pensated 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 mag-
netic flux density which run perpendicularly through the sensor.

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.

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.


Page 7 / 92
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 mag-
netic 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 con-
sideration that the magnetic field component is only measured in one direction
so that tilting the measuring probe might lead to an error.