Reference Temperature: The temperature at which a thermocouple temperature measurement is referenced. For Fluke Calibration tools, this is the temperature where the thermocouple mini-plug is connected to the calibrator.
Rφ: The resistance value of an RTD probe at 0 °C. Example PT100-385, Rφ = 100 Ω.
RTD: Resistance Temperature Device, a temperature measurement sensor that has predictable changes in resistance with a change in temperature. The most common RTD is the platinum PT100-385.
Seebeck Effect: Thermoelectric effect in which the voltage potential increases with temperature (thermocouples) in a junction of dissimilar metals.
Triple point of water: This temperature reference point is the intrinsic standard at which water is liquid, ice and gas. This reference point defines 0.01 °C.
