Because the rms voltage is typically a better measure of the true heat input to the weld by the welding process, the rms weight b is preferably greater than the average weight a, that is, b>a. Moreover, {HEAD ~ the sum} of {TAIL ~ the weighting factors} is preferably unity, that is, a+b=1 
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Because the rms voltage is typically a better measure of the true heat input to the weld by the welding process , the rms weight b is preferably greater than the average weight a , that is , b > a. Moreover , { HEAD ~ the sum } of { TAIL ~ the weighting factors } is preferably unity , that is , a+b=1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH