wherein a plurality of expanding {TAIL ~ ranges} are set for {HEAD ~ said target conductivity}, each with a corresponding increased modifying value to said target conductivity 
wherein a plurality of expanding { TAIL ~ ranges } are set for { HEAD ~ said target conductivity } , each with a corresponding increased modifying value to said target conductivity
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH