Schwarzbeck HXYZ 9170 3-dimensional Large Loop Antenna

According to EN 55015 / 4.4 the magnetic field strength offlourescent lighting luminaires has to be measured, if the operating frequency is above 100 Hz. The measurement is done with a triple loop antenna as shown above. The Unitunder Test is positioned under operating conditions in thecentre of the triple loop antenna. To measure the magnetic field strength without turning, there are loops in X-,Y- and Z-direction. A current transformer converts the loop current into an appropriate voltage. Ferrite chokes reduce braid currenton the coaxial cables which would cause wrong measurement.