The present invention relates to measuring temperature (t) using a thermocouple (30), with a first measurement point (33) along a positive conductor (31), and a second measurement point (34) along a negative conductor (32). The arrangement is configured to obtain a Seebeck coefficient(S) for the material pair; and to measure a first temperature (t.sub.1) in the cold end of the thermocouple (30) at a first measurement point (33); and to measure a second temperature (t.sub.2) at a second measurement point (34). Thermal voltages (U.sub.1, U.sub.2) are measured. The arrangement further calculates a weighted average of the temperature (T.sub.ave) by dividing a temperature difference of the first (t.sub.1) and second (t.sub.2) temperatures with a ratio N=U.sub.1/U.sub.2; and calculates temperature (t) in the hot end of the thermocouple (30) based on the obtained Seebeck coefficient(S) for the material pair and the calculated weighted average of the temperature (T.sub.ave).

An input module includes a terminal block defining a plurality of terminals. Each terminal includes an opening to receive an external wire. The electrical connector assembly is received by at least one terminal and includes an internal thermocouple and a pivot member. The internal thermocouple has a first leg and a second leg coupled together at a first end of the internal thermocouple and spaced apart to define a jaw connector at a second end. The pivot member is pivotable to couple the external wire to the first end. The input module includes a printed circuit board to be coupled to the electrical connector assembly via the jaw connector. The printed circuit board includes a processing circuit to perform cold junction compensation based on a temperature of the printed circuit board and a temperature or a voltage of the internal thermocouple.

An input module includes a terminal block defining a plurality of terminals. Each terminal includes an opening to receive an external wire. The electrical connector assembly is received by at least one terminal and includes an internal thermocouple and a pivot member. The internal thermocouple has a first leg and a second leg coupled together at a first end of the internal thermocouple and spaced apart to define a jaw connector at a second end. The pivot member is pivotable to couple the external wire to the first end. The input module includes a printed circuit board to be coupled to the electrical connector assembly via the jaw connector. The printed circuit board includes a processing circuit to perform cold junction compensation based on a temperature of the printed circuit board and a temperature or a voltage of the internal thermocouple.

A thermocouple assembly is provided that allows a first type of thermocouple to be used with thermoelements compatible with a second type of thermocouple. For a single thermocouple, a translator device measures a temperature using a new thermocouple and determines and outputs a voltage difference to existing thermoelements for a replaced thermocouple. For two or more thermocouples, a new terminal block is provided between an existing transmitter and the existing thermocouples, which are replaced by new thermocouples of a different type connected to the new terminal block. Existing extension wires are used to make a thermocouple at the new terminal block. A multiplexer is connected to terminals at the existing transmitter or terminal block. Temperatures at the new thermocouples are determined by forming particular circuits and using the temperature at the new block. Additional temperatures can also be determined using existing extension thermoelements. New installation cost can be reduced and functionality can be added using type B, R or S thermocouples with type K or type N extension wire or compensation cable.

A thermocouple assembly is provided that allows a first type of thermocouple to be used with thermoelements compatible with a second type of thermocouple. For a single thermocouple, a translator device measures a temperature using a new thermocouple and determines and outputs a voltage difference to existing thermoelements for a replaced thermocouple. For two or more thermocouples, a new terminal block is provided between an existing transmitter and the existing thermocouples, which are replaced by new thermocouples of a different type connected to the new terminal block. Existing extension wires are used to make a thermocouple at the new terminal block. A multiplexer is connected to terminals at the existing transmitter or terminal block. Temperatures at the new thermocouples are determined by forming particular circuits and using the temperature at the new block. Additional temperatures can also be determined using existing extension thermoelements. New installation cost can be reduced and functionality can be added using type B, R or S thermocouples with type K or type N extension wire or compensation cable.

A thermocouple assembly is provided that includes a type 1 thermocouple for indicating a temperature T; a transmitter configured to receive a voltage input from a type 2 thermocouple; and a thermocouple translator device (TTD) connected to the TMD and to the transmitter. The TTD determines a voltage that corresponds to the temperature T for the type 1 thermocouple and determines a voltage output VO from a type 2 thermocouple that corresponds to the temperature T. The TTD outputs the voltage output VO to the transmitter so that the transmitter can determine the temperature T as though an input was received from a type 2 thermocouple. The type 1 thermocouple may comprise expensive thermoelements while the type 2 thermocouple may comprise inexpensive thermoelements. The type 1 thermocouple can instead be any temperature measuring device.

A thermocouple assembly is provided that includes a type 1 thermocouple for indicating a temperature T; a transmitter configured to receive a voltage input from a type 2 thermocouple; and a thermocouple translator device (TTD) connected to the TMD and to the transmitter. The TTD determines a voltage that corresponds to the temperature T for the type 1 thermocouple and determines a voltage output VO from a type 2 thermocouple that corresponds to the temperature T. The TTD outputs the voltage output VO to the transmitter so that the transmitter can determine the temperature T as though an input was received from a type 2 thermocouple. The type 1 thermocouple may comprise expensive thermoelements while the type 2 thermocouple may comprise inexpensive thermoelements. The type 1 thermocouple can instead be any temperature measuring device.

A system and method for determining the type of an analog sensor device in a process control system comprising at least a terminal block unit comprising four connection ports connectable with an analog sensor device, wherein the sensor device to be determined is a 2-wire connection sensor device, a 3-wire connection sensor device, or a 4-wire connection sensor device. The method includes detecting whether: a predefined resistance value is present for a 2-wire connection sensor device, a 3-wire connection sensor device, a predefined resistance value between two predefined pairs of connection ports of the terminal block unit is provided, or a 4-wire connection sensor device is connected to the terminal block unit.

A system and method for determining the type of an analog sensor device in a process control system comprising at least a terminal block unit comprising four connection ports connectable with an analog sensor device, wherein the sensor device to be determined is a 2-wire connection sensor device, a 3-wire connection sensor device, or a 4-wire connection sensor device. The method includes detecting whether: a predefined resistance value is present for a 2-wire connection sensor device, a 3-wire connection sensor device, a predefined resistance value between two predefined pairs of connection ports of the terminal block unit is provided, or a 4-wire connection sensor device is connected to the terminal block unit.