High-temperature thermoelement calibration
AssigneeIndustrieanlagen-Betriebsgesellschaft mbH
InventorsRainer Gaus, Michael Dienz, Kai K. O. Bar
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Abstract
The invention relates to a method and its implementation for the rapid calibration of thermoelements, preferably in the temperature range from 700.degree. C. to 1800.degree. C. The calibration apparatus consists of commercially available components, is therefore comparatively very economical, light and portable; the energy consumption is low, because the conventional heating chamber can be eliminated. Errors of the first and second kind associated with the thermoelements to be calibrated are detected.
Claims5
Method of calibrating thermoelements in the temperature range from room temperature to about 2800.degree. C., with a preferred working range from about 700.degree. C. to 1800.degree. C., characterized by the combination of the following procedural steps:
- the radiation emitted by a modulated light source is focussed, after a parallel beam has been produced by a parabolic reflector, by a lens system onto the tip of a thermoelement;
- the emissivity and the temperature of the tip of the thermoelement are measured by means of first and second pyrometers, each having its own pyrometer lens system;
- and
- in a data-processing system the emissivity and temperature of the tip measured by the first and second pyrometers are compared with the temperature measured by the thermoelement.
Dependencies are inferred from the claim text.