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LANGER
EMV-Technik
DE-01728 Bannewitz
[email protected]
www.langer-emv.de
E1
BS
02 magnetic field source
Use
BS 02 couples a magnetic field between a
connector's shielding connection and
signal lines (pig tale) to find out whether
the signal input is sensitive to
disturbances.
Please refer to Chapter 2.2 for tips on how to select the individual probes.
The field intensity of a magnetic field source can be adjusted at the SGZ 21's "Intensity" controller (Figure
2). If the intensity is set very high, the magnetic field of the field source spreads over a larger area of the
module than if the intensity is set to a lower value. The measurement process has to be adjusted with the
"Intensity" controller to exactly pinpoint small sensitive weak points. Even very small sensitive points can
then be precisely localised. Should this adjustment prove insufficient, the PULSE SHAPE toggle switch
(Figure 2) can be changed over to "wide pulse" so as to attenuate the interference effect. The intensity may
then have to be slightly increased again if necessary.
5.2.4
Practical procedure for coupling with electric field sources
The field source is used to search for sensitive conductors or components which are responsible for a
certain fault pattern. Coupling to large line sections or line bundles is only possible with field sources which
generate fields of a similar size. The field sources ES 00 to ES 02 (Figure 39) (2.2.2 Field sources for electric
field), for example, can be used for lines in the 10 cm range. The field source is gradually moved towards
the device under test starting at a distance of approximately 10 cm until it rests on the device under test.
Figure 39: ES 00 - 02 field sources with a large field to apply an electric field to conductor loops of
around 10 cm.
