The method 1, wherein the compensation voltage is determined by calculating a difference between the value of the at least one parameter and a fixed stored value and determining the compensation voltage from {HEAD ~ a stored relationship} of differences to {TAIL ~ compensation voltages} 
The method 1 , wherein the compensation voltage is determined by calculating a difference between the value of the at least one parameter and a fixed stored value and determining the compensation voltage from { HEAD ~ a stored relationship } of differences to { TAIL ~ compensation voltages }
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 HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL