ThyssenKrupp manual GaussMeter0 pages

www.thyssenkrupp-magnettechnik.com
ThyssenKrupp Magnettechnik
ThyssenKrupp manual GaussMeter
with polarity display
Type: 181002
This value-for-money device has been designed for simple operation and easy handling. Unnecessary
switches, buttons, range changers and the like have been omitted. A simple press button (4) on the
front switches the device on for as long as the button is depressed, thus ensuring a long battery life.
Intended use
This measuring device is used to display both the field
strength and to determine the polarity of permanent magnets
and d.c. coils.
Description of functioning
Displaying the field strength
The ThyssenKrupp manual GaussMeter has a 3 ½ character
LCD display (3) to display the field strength precisely.
Measuring range
The range extends from 0 mT to 1999mT. If this value is multiplied by a factor of 10, the display gives
the Gaussian equivalent, namely 100mT=1000G. These are the most common units in the world for
flow density.
Units
The option of displaying the field strength in A/m according to the SI system was not applied.
ThyssenKrupp Magnettechnik remains true to the world-wide use and the tradition of displaying the
measuring results in G or in T. Conversion: 10 G = 10 Oe = 796 A/m = 1 mT
Accuracy
The resolution of the display is approx. 0.5 % corresponding to 10G = 1mT. All devices are calibrated at
a value of 325 mT. The accuracy with this value is thus particularly high and can be stated absolutely to
± 1 %. The use of high-quality sensors makes the linearity better than 1%. Due to the neutral-toground compensation implemented and the high linearity of the sensor, accuracy can be stated
over the complete measuring range to ± 2 %.
Measuring procedure
In order to achieve the accuracy described above, care should be taken to ensure that the field lines are
always vertical to the sensor area. Avoid air gaps between the sensor and the magnet or the item to be
measured. Taking a flat magnet as an example (see drawing on page 2), this means that the field
strength is measured by lightly laying the sensors onto the magnet.
Polarity display
A green LED shows a south pole, a red LED the north pole (2). Measurements are always taken by laying the device with the sensor gently "from above" onto the magnetic pole under investigation. It is essential to follow this convention as otherwise exactly the opposite polarity will be displayed.
Remark: A LED lights up as soon as the device is switched on, whether there is a magnet in the vicinity
or not. The sensitive comparator favours a LED, even without a magnetic field. The correct polarity is
first displayed when a magnetic pole is approached.
Johanniskirchstraße 71
45329 Essen, Germany
Tel. +49 (0)201 946161-0
Fax +49 (0)201 946161-555
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