Compensation device for the cold junction of a thermocouple
AssigneeSadis Bruker Spectrospin Societe Anonyme de Diffusion de l'Instrumentation Scientifique Bruker Spectrospin
InventorsPatrick Krencker, Jean-Luc Weishaar
Life of this patent
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Abstract
A cold junction compensation device for a thermocouple, comprising a thermostatically interface casing (1) receiving directly the wires (3, 3') of the thermocouple (2) and ensuring the interconnection of these latter with an extension cord (4). The interface casing (1) contains moreover a cold junction compensation circuit (5).
Claims7
Compensation device for the cold junction of a thermocouple, comprising a thermostatically controlled interface casing (1), receiving directly wires (3, 3') of said thermocouple (2) and ensuring the interconnection of said wires with an extension cord (4), said interface casing (1) containing a cold junction compensation circuit (5) for the cold junction of said thermocouple (2), said compensation circuit (5) having an error signal generator, dependent directly on the temperature variation at a contact point (5') of the thermocouple (2) in a printed circuit (10) and superposed on a measurement signal emitted by the thermocouple (2), said generator being adjusted as a function of the internal temperature of the thermostatically controlled internal casing (8) and as a function of the type of thermocouple (2).
Dependencies are inferred from the claim text.