Multichannel thermocouple compensation for three dimensional temperature gradient

An apparatus for measuring a temperature at a source, the apparatus comprising:

• a thermocouple measuring junction to be positioned at the source and connected with a reference junction via first and second wires;
• an electrical connector at the reference junction, wherein the electrical connector includes a first and second portion, and wherein the first portion is connected with the reference junction and the second portion is removably connected with the first portion, and wherein each of the first and second portions includes a plurality of terminals, wherein each of the terminals on the first portion is configured to mate with a terminal on the second portion;
• and
• at least one temperature sensor disposed at each of the two portions of the electrical connector to receive thermocouple signals, wherein the at least one temperature sensor is located on a circuit board and is configured to measure the temperatures at the two or more portions using the temperature sensors, wherein a component on the circuit board calculates the temperatures at each terminal of the electrical connector based on measured temperature values of the two temperature sensors, and wherein the component on the circuit board calculates a cold junction temperature of a terminal for at least one thermocouple channel carrying the thermocouple signals based on measured or calculated temperature values of the terminals, or a combination thereof, wherein each of the temperature sensors is electrically connected to each terminal, and wherein the electrical connector has more terminals than temperature sensors.

An apparatus for measuring a temperature at a source, the apparatus comprising:

• a thermocouple measuring junction to be positioned at the source and connected with
• a reference junction via first and second wires;
• an electrical connector at the reference junction, wherein the electrical connector includes a first and second portion, and wherein the first portion is connected with the reference junction and the second portion is removably connected with the first portion, and wherein each of the first and second portions includes a plurality of terminals, wherein each of the terminals on the first portion is configured to mate with a terminal on the second portion;
• and
• at least one temperature sensor disposed at each of the two portions of the electrical connector to receive thermocouple signals, wherein the at least one temperature sensor is configured to measure the temperatures at the two or more portions, wherein each of the temperature sensors is electrically connected to each terminal, and wherein the electrical connector has more terminals than temperature sensors.