Patent ID: 7367712

Claim:
An RTD measurement device comprising: detection circuitry configured to detect whether an RTD coupled to the RTD measurement device via a plurality of wire connections includes a 3-wire configuration or a 4-wire configuration by detecting a voltage drop across a resistive element coupled between a first terminal and a second terminal of the RTD measurement device; and processing circuitry configured to process one or more readings from the RTD; wherein, in response to the detection circuitry detecting a voltage drop across the resistive element that is above a predetermined threshold, the detection circuitry is operable to configure the processing circuitry to operate in a 3-wire configuration mode; wherein, in response to the detection circuitry detecting a voltage drop across the resistive element that is below the predetermined threshold, the detection circuitry is operable to configure the processing circuitry to operate in a 4-wire configuration mode.