UMS 4 and ENB -
the solution for EMV-test according to EN 50366

Technical Data

Magnetic field sensor ENB

  • Standard-compliant measurement according to EN 50366
  • For use with the measurement system UMS4
  • Suitable for all signal forms due to measuring with reference procedure
  • Isotropic sensor with 3 x 100 cm² coil surface
  • Frequency range 10 Hz to 400 kHz
  • Direct display of the measured value in percent of the limit value
  • Data logger function and serial interface

EMC test according to EN 50366

The European standard EN 50366 defines the admissible electromagnetic radiation of electrical equipment for use in the home and similar purposes. For this purpose, exacting guidelines with regard to the sensor and to signal conditioning are defined for the test. With the sensor ENB in connection with the measuring system UMS4, these measurements can be carried out easily and in a time-saving manner because signal conditioning and the necessary weighting of the frequency components that are found are carried out automatically and the measured result is displayed directly in percent of the limit value.

Measuring system UMS4

The measuring system UMS4 is a multi-purpose measuring device with integrated data logger for the use in testing laboratories and for environmental protection and industrial safety applications. It enables a parallel acquisition and recording of up to 16 measured quantities. A comprehensive range of sensors for electromagnetic fields, climatic, chemical and any further technical measured quantities is available.
Varied special functions such as adjustable limit values, an acoustic display and different analog outputs and serial interfaces help to make it easy to operate. The PC program DATA-UMS specifically developed for the measuring system UMS4 enables a comprehensive and uncomplicated evaluation and documentation of recorded measured data.

Magnetic field sensor

The field sensor for an isotropic measuring of alternating magnetic fields is equipped with three coils arranged vertically to each other with a surface of 100 cm² each. Independently of the quality of the magnetic field to be examined, all frequency components in the signal in the range of 10 Hz to 400 k Hz are recorded and evaluated by means of a filter according to the standard. This transfer function renders knowledge of the signal form or the formerly applied FFT analysis superfluous.
The separation of sensor and display enables a particularly simple and ergonomic handling, while additionally available sensor slots on the UMS4 enable a simultaneous recording of up to twelve further measurable quantities. In that way, the room temperature or the air humidity can be additionally documented, for example, in the framework of an EMC measurement.

Multifunctional display

 

The 4-line LC display is particularly convenient: the ratio of total flux density to the admissible limit value is directly displayed as value in percent, while the simultaneous display of the X, Y and Z components facilitate the identification of the magnetic lines of force in space. Further guidance is provided by the display of an analog bar as well as of the maximum value, minimum value and mean value, while the integrated FFT analysis visualises the frequency spectrum in a range of up to 20 kHz.
Furthermore, a PC monitor can be used as a second, large-format display via the serial interface of the UMS4.

Additional functions

The threshold value for an acoustic alarm can be adjusted individually so that the different coupling coefficients of different device types can be taken into consideration. The integrated data logger of UMS4 enables you to record the magnetic field exposition over time, for example during the heating-up phase of a device, and to document it via a PC. The analog output enables an external analysis of the signal form by means of an oscilloscope or a spectrum analyser.

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Technical data sensor ENB

Sensor:

  • 3 coils 100 cm2

Measuring ranges:

  • 0..200%
  • 0..2000%

Resolution:

  • 0,1%
  • 1%

Frequency range:

  • 10 Hz - 400 kHz

Frequency evaluation:

  • transfer function according to EN 50366

Measurement uncertainty :

  • less than 5% (50Hz) ±3dB

Display:

  • percent of limit value according to EN 50366

Display functions:

  • X-, Y-, Z-components
  • Min. value, mean value, max. value
  • analog bar

Current input:

  • approx. 40 mA

Dimensions:

  • 120 x 120 x 380 mm

Weight:

  • 330 g

Operating temperature:

  • 0..50 °C

Subject to technical alterations.

Ordering information

  Measuring system UMS4 Item No. 0010
  Sensor ENB Item No. 1080
  EN 50366 measuring case with measuring system UMS4 and sensor ENB    Item No. 2400


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