Settings of RTD 2W or RTD 4W: R0: R0 is an RTD nominal resistor at 0 ℃. The default value is 100 Ω Aperture PLC: 0.02, 0.2, 1, 10, 100. Default value: 10 Units: °C, °F, or K Settings of Thermis2W and Thermis4W: Aperture PLC: 0.02, 0.2, 1, 10, 100. Default value: 10 Auto Zero: Off or On (Default) (2-wire measurement only; Not suitable for 4-wire measurement) Units: °C, °F, or K Keys Application Run and stop the measurement. Save function. Take a single measurement. Take one or more hand-free measurement. Take a null measurement. Configure null functions, statistics, and limits. Configure the text and graphics that appear on the display and secondary measurements.