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Vol. 123, Issue 12, December 2010, pp.76-83

 

Bullet

Mathematical Models of Methodical Error for Noise Thermometers

 

Bogdan Stadnyk, Ihor Mykytyn

National University Lviv Polytechnic,

Institute of Computer Technologies, Automation and Metrology,

Bandera Str. 12, 79013 Lviv, Ukraine

Tel.: +38-0322-58-26-19

E-mail: mykytynip@ukr.net

 

 

Received: 10 September 2010   /Accepted: 21 December 2010   /Published: 28 December 2010

 

Abstract: The main possible variants of the noise thermometer input circuit with the usage of one- and two- channel amplifiers are considered and their noise models are developed. The expressions of relative standard deviation components and the relative average square of a methodical error according to the noise parameters of the primary transformer pickoff, the operational amplifier, feed-back connection resistors and the connection line are gained.

 

Keywords: Temperature, Noise voltage, Noise thermometry, Methodic error, Input circuit

 

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