IMPROVED TEMPERATURE CONTROL SYSTEM OF SECONDARY VOLTAGE STANDARD BASED ON WESTON STANDARD CELLS

Roman Kochan, Juergen Niemeyer, Eugen Kryloshanski, Anatoly Sachenko, Oxana Boyko, Volodymyr Kochan

Abstract

There is considered the thermistor implementation in the automatic temperature control system of secondary voltage standard of Ukraine. High sensitivity and resistance of thermistor allows decreasing the self-heating of the sensor to the negligible quantity. The significant drift of the thermistors is proposed to correct by its testing and calibration using reference RTD in the same system. The intercalibration time is proposed to increase by using thermistor’s conversion characteristics prediction methodology based on artificial neural networks. There is described the general structure of proposed automatic temperature control system and evaluated its error.

Keywords

Weston Standard Cell, temperature sensor, error correction, drift prediction

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IMEKO-TC7-2004-125.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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