Patent ID: 7534028

Claim:
A burning oven comprising: a combustion chamber ( 16 ) formed by an oven hood ( 14 ) for the firing of dental restorations; an oven base ( 22 ) below the combustion chamber; a temperature detection element ( 12 ) disposed in said oven hood; and a reusable calibrating device ( 26 ) for calibrating said temperature detection element, wherein said calibrating device has a temperature sensor ( 28 ) that is calibrated at a given number of temperature points, the calibrating device further including an essentially pure substance surrounding the sensor, and a further material that at least partially surrounds a portion of the temperature sensor, wherein said essentially pure substance is disposed at least in a closed space formed between said temperature sensor ( 28 ) and said further material, the further material completely surrounding said substance, and the calibrating device being fixedly installed in said burning oven ( 10 ) in the region of the oven base, said calibrating device ( 26 ) having a stored prescribed temperature profile for calibration of said temperature detection element ( 12 ), and wherein said calibration via said calibrating device is effected while starting a temperature profile, one time with overpressure or underpressure, and one time at ambient air pressure, wherein at least one of said temperature points is a melting point of an essentially pure substance ( 42 ) that upon reaching its melting point changes its aggregate state, and wherein the temperature of said essentially pure substance, which remains constant during the duration of the aggregate state change, is utilized for the temperature detection, and wherein said temperature sensor ( 28 ) is a thermocouple.