Method of calibrating a radiation thermometer

US6283629A · kind A · utility

Assignee

• The Braun Corporation · DE

Inventors

• Bernhard Kraus · Solms, DE
• Frank Beerwerth · Runkel, DE
• Klaus Heubach · Königstein, DE
• Manfred Kaiser · Karben, DE

Key dates

• Filing date: Apr 4, 2000
• Grant date: Sep 4, 2001
• Expiry date: Apr 4, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J5/80
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of calibrating a radiation thermometer including a radiation sensor that is characterized by a sensitivity (S) and a temperature-responsive resistor that serves as an ambient temperature sensor, the temperature-responsive resistor having at a specified reference temperature a reference resistance (R.sub.0). The method includes the steps of using a first radiation standard having a known temperature T.sub.S (1); while the ambient temperature sensor is at a first ambient temperature T.sub.U (1), using the radiation thermometer to read the temperature of the first radiation standard; while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor; using a second radiation standard having a known temperature T.sub.S (2); while the ambient temperature sensor is at said first ambient temperature T.sub.U (1), using the radiation thermometer to read the temperature of the second radiation standard; while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor; and calibrating the radiation sensor…