Resistance reference junction compensator

Details Resistance reference junction compensator Resistance reference junction compensator

G - Physics

01

K

356/107, 356/3

G01K 7/12 (2006.01) G01K 7/13 (2006.01)

Patent

CA 1043910

APPLICATION OF WILLIAM K. ERHARDT A RESISTANCE REFERENCE JUNCTION COMPENSATOR ABSTRACT OF THE DISCLOSURE A reference junction compensator for a multi-thermocouple activated temperature measuring circuit is an electrically equiv- alent of an ice bath cold junction compensator. The compensator includes a reference resistor forming a major portion of a printed circuit board. The resistor is retained against an isothermal terminal panel that contains the input terminals of each one of a plurality of thermocouples, The printed circuit reference resistor is interspersed about each pair of terminals and extends along substantially all remaining portions of the board that is in contact with the panel whereby the change in temperature of the reference resistor is maintained at substantially the same value as the temperature of the isothermal terminal panel, The resultant integrated effect which is afforded by the resistor pattern of the resistance compensator provides an accurate, rapid means of neutralizing any adverse heating and/or cooling tempera- ture effects on the input terminals of any one or more of the aforementioned thermocouples and their associated measuring circuit.

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