MEASUREMENT OF MAGNETIC FIELDS EMITTED FROM WELDING MACHINES

Abstract

The electric arc welding process makes use of the heat produced by theelectric arc to fusion weld metallic pieces. An electric arc is formed when an electric currentpasses between two electrodes separated by a short distance from each other. The aim of thiswork is to determine the electromagnetic field strength emitted by different electrical weldingmachines at different ranges and identify the safe ranges in order to avoid its negative healtheffects on the welder body. The research has been performed in two parts, mathematicalcalculations and practical measurements using (EMF-827) field tester. Both measurementsindicate that these exposure levels lie within permissible international standard limits , but insome very close to the torch the values of magnetic filed are above the standard permissiblevalues, so there is no harm to human health if the exposure is for an intermittent anddiscontinuous periods.