Multichannel Reference Junction Compensation Circuit
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
A described thermal circuit reduces the reference junction temperature difference between any two channels of a multichannel thermocouple reading instrument, thus increasing the overall accuracy of the instrument. This is accomplished without permanently altering the original instrument. The reference junction of a thermocouple circuit is formed when the leads of a thermocouple, other than copper, are attached to the copper input terminals of the thermocouple reading instrument. The accurate determination of the temperature of the reference junction is necessary for the measuring instrument to determine the temperature being monitored by the measurement thermocouple.