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