RTD measurement unit including detection mechanism for automatic selection of 3-wire or 4-wire RTD measurement mode

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 first configuration comprising a first number of wire connections or a second configuration comprising a second number of wire connections;
• and
• processing circuitry configured to process one or more readings from the RTD;
• and
• wherein, in response to detecting a first configuration, the detection circuitry is operable to configure the processing circuitry to operate in a first configuration mode;
• wherein, in response to detecting a second configuration, the detection circuitry is operable to configure the processing circuitry to operate in a second configuration mode.

A method for operating an RTD measurement device, the method comprising:

• detecting 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;
• processing one or more readings from the RTD;
• in response to detecting a 3-wire configuration, configuring the RTD measurement device to operate in a 3-wire configuration mode;
• and
• in response to detecting a 4-wire configuration, configuring the RTD measurement device to operate in a 4-wire configuration mode.