Potential errors in VDT fringing field measurements

The authors correct the error of current jargon, including electromagnetic emissions at extra low frequency (ELF), and correctly define the terms needed to describe fringing electric potential gradient and magnetic flux density near any magnetically deflected, raster scan, CRT display. Application of Maxwell´s equations shows that the commonly used pickup coil responds to the derivative of magnetic flux density; furthermore, the electric field pickup transducer also responds to the derivative of electric potential gradient. Both transducers need an integrator to respond properly to the sawtooth waveforms of deflection fields and power supplies. Correct measurements of video display terminal (VDT) fringing magnetic fields are presented. The conclusion from the authors work is that there is not an occupational health risk from the fringing electric or magnetic fields near VDTs