The engineers at Narda Safety Test Solutions have achieved a breakthrough in isotropic measurement and analysis of low-frequency magnetic fields in the form of their latest digital H-field probe, the BFD-400-1. When connected to the FieldMan, Narda’s smart, intuitive broadband EMF meter, it reliably and safely captures and evaluates the exposure of operatives to magnetic fields at frequencies between 1 Hz and 400 kHz, which are present in the automotive and railroad industries and many other industrial applications.
Together with the compact EHP-50F Probe, the frequency-selective FFT field analyser for isotropic measurement of electric and magnetic fields, which can now also be used with the FieldMan, they both cover the entire low-frequency range for workplace safety applications. The probes automatically evaluate the exposure levels in accordance with the major standards such as EU Directive 2013/35/EU, ICNIRP or IEEE, while the FieldMan indicates the exposure level index directly as a percentage of the limit value for the selected standard.
The BFD-400-1 has six operating modes, starting with Field Strength, Spatial Average (which measures the spatial average of the field strength across several points distributed in a space), and Timer Logging (measures field strength continuously or at regular intervals over a defined time period). In Spectrum/Real Time FFT mode, the new probe can resolve and analyse the individual frequency components of the electromagnetic field in real time. Shaped Time Domain mode allows test technicians to record the signals in the time domain including any frequency-dependent weighting (shaping). Scope mode enables visualisation of the development of a magnetic field in the time domain without the need for an external oscilloscope. Finally, technicians can use the BFD-400-1 in Raw Data Streaming mode to continuously capture unprocessed raw data in real time and transfer it to an external system such as a PC or a data logger.
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