6 p3.3 atc (automatic temperature compensation), 7 p3.4 tds (total dissolved solids factor), 8 p3.5 t.co (temperature coefficient) – Nova-Tech CON 700 User Manual

Page 14: P3.2 ºc ºf (celcius or fahrenheit), P3.3 atc (automatic temperature compensation), P3.4 tds (total dissolved solids factor), P3.5 t.co (temperature coefficient)