Temperature reference junction for a multichannel temperature sensing system.

摘要

A multi-channel remote-temperature-sensing system has a reference temperature assembly for the reference junctions (12) of a plurality of thermocouples for determining temperatures at remote points (10). The assembly comprises an array of components (2) each adapted to make thermal contact with a reference junction (12) of a respective remote-temperature-sensing thermocouple, an absolute reference thermometer (1) situated within the array for measuring an aboslute reference temperature and a thermocouple for sensing a temperature difference between the absolute reference thermometer (1) and a component of the array (2X). Data processing means (20) calculate the temperature of the component (2X) of the array from the absolute reference temperature and the temperature difference. Temperature difference sensing thermocouples may not be provided to measure the temperatures of some of the components (2) of the array, the temperatures of such components (2) being interpolated by the data processing means (20) from the measured temperature differences.