Protecting tube deterioration detecting apparatus and method therefor
First Claim
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1. A protecting tube deterioration detecting apparatus, comprising:
- a power supply unit configured to apply an electric current to a thermocouple with protecting tube having a distal end to which plating is applied to form a plating layer with a predetermined thickness;
a temperature rise amount calculator configured to cause the power supply unit to apply a predetermined electric current to the thermocouple for a predetermined time and calculate a temperature rise amount of the thermocouple; and
a deterioration determinator configured to determine a wear amount of the plating layer of the protecting tube based on the temperature rise amount calculated by the temperature rise amount calculator.
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Abstract
A protecting tube deterioration detecting apparatus applies a predetermined electric current to a measurement target thermocouple with protecting tube for a predetermined time, calculates a temperature rise amount of the thermocouple, and determines, when the calculated temperature rise amount exceeds a predetermined threshold, that the protecting tube is deteriorated.
5 Citations
9 Claims
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1. A protecting tube deterioration detecting apparatus, comprising:
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a power supply unit configured to apply an electric current to a thermocouple with protecting tube having a distal end to which plating is applied to form a plating layer with a predetermined thickness; a temperature rise amount calculator configured to cause the power supply unit to apply a predetermined electric current to the thermocouple for a predetermined time and calculate a temperature rise amount of the thermocouple; and a deterioration determinator configured to determine a wear amount of the plating layer of the protecting tube based on the temperature rise amount calculated by the temperature rise amount calculator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A protecting tube deterioration detecting method for a thermocouple with protecting tube having a distal end to which plating is applied to form a plating layer with a predetermined thickness, said method comprising:
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a temperature rise amount calculating step of applying a predetermined electric current to the thermocouple for a predetermined time and calculating a temperature rise amount of the thermocouple; and a deterioration determining step of determining a wear amount of the plating layer of the protecting tube based on the temperature rise amount of the thermocouple.
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Specification