Techniques for making high-temperature thermocouples and related thermocouples and methods
AssigneeBattelle Energy Alliance, LLC
InventorsRichard S. Skifton, Alma J. Palmer, Kurt Davis, Joshua Daw, Pattrick Calderoni
Life of this patent
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Abstract
Methods of manufacturing thermocouples may involve exposing a first thermoelement wire and a second thermoelement wire to a temperature in a range extending from about 50° C. to about 60° C. above an intended operational temperature of the first and second thermoelement wires and until a rate of change of a normalized voltage output of the first thermoelement wire and the second thermoelement wire is about 0.001 normalized Volts per hour or less.
Claims20
A method of manufacturing a thermocouple, comprising:
- exposing a first thermoelement wire and a second thermoelement wire to a temperature in a range extending from about 50° C. to about 60° C. above an intended operational temperature of the first and second thermoelement wires and until a rate of change of a normalized voltage output of the first thermoelement wire and the second thermoelement wire is about 0.001 normalized Volts per hour or less.
A method of heat-treating a thermocouple, comprising:
- measuring an output voltage of a thermocouple while exposing a first thermoelement wire and a second thermoelement wire to a temperature between about 50° C. to about 60° C. above a predetermined operational temperature of the first and second thermoelement wires;
- and
- maintaining the first thermoelement wire and the second thermoelement wire exposed to the temperature until a rate of change of a normalized voltage output of the first thermoelement wire and the second thermoelement wire is between about 0.001 normalized Volts per hour and about 0.0001 normalized Volts per hour.
A thermocouple subjected to a method of heat treating, the method comprising:
- exposing a first thermoelement wire and a second thermoelement wire to a temperature in a range extending from about 50° C. to about 60° C. above an intended operational temperature of the first and second thermoelement wires and until a rate of change of a normalized voltage output of the first thermoelement wire and the second thermoelement wire is about 0.001 normalized Volts per hour or less.
Dependencies are inferred from the claim text.