What is automatic temperature compensation?
A. pH measurements need to be corrected for temperature when calibrating, and this can be done manually or with an ATC probe. This is the Nernstian slope correction. At 25oC, this value is 59.2mV/pH unit, however at 10oC the value is 56.2 mV/pH unit. Regardless of whether you use an ATC or not, it is NOT possible to compensate the pH of a sample at one temperature to another temperature, as the coefficients are unknown.
