Mathematical Modeling of Effects of Various Factors on Uncertainty of Measurement in Material Testing

Abstract. Quality of transformer oil plays vital role in the performance of transformer in electrical appliances. Measurement uncertainty is a general concept associated with any measurement and can be used in professional decision processes as well as judging attributes in many domains, both theoretical and experimental. As the tolerances applied in industrial production become more demanding, the role of measurement uncertainty becomes more important when assessing conformity to these tolerances. Measurement uncertainty plays a central role in quality assessment and quality standards. In an effort to meet national, international and commercial accreditation requirements, users of transformer oil testing machines must establish adequate methods of determining calibration and test measurement uncertainties. Determining measurement uncertainty for transformer oil testing equipments and test data can be a very complex process. Many factors affect the uncertainty of test data produced by testing machines. In this paper, the concepts associated with the procedure for estimation of uncertainty is discussed and the application of these for the determination of uncertainty in transformer oil testing equipments in government testing labs is illustrated. The objective of this study is to develop a methodology for determining the result of measurement concerning electrical properties of transformer oil and their respective uncertainties.

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Determination of Uncertainty in Gross Calorific Value of Coal Using Bomb Calorimeter

Mandavgade

¹

,

Jaju

²

,

Lakhe³

2013

Advanced Instrument Engineering

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A bomb calorimeter is an apparatus used for measuring the performance of coal in term of heat of combustion. Recent awareness has been created regarding uncertainty of measurement, due to mainly two reasons. Laboratory accreditation, which has steadily been on the rise, which requires a estimation of uncertainty of measurement particularly in the field of calibration. Second, increased maturity level of the quality system certification as the manufacturing companies looking at the reliability of measurement through correct calibration of inspection, measuring and test equipment. The quality of coal is decided by the various parameters such as ash content, air dried moisture, volatile matter, gross calorific value and sulphur content etc. The grade of coal is decided by the quality of coal which decides the performance of generation of electricity. The uncertainty of measurement in bomb calorimeter gets affected by various parameters. This paper describes the methodology, uncertainty calculations and effects of individual factors on it.

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Determination of Uncertainty in Gross Calorific Value of Coal Using Bomb Calorimeter

Mandavgade

¹

,

Jaju

²

,

Lakhe³

2011

International Journal of Measurement Technologies and Instrumentation Engineering

View full text Add to dashboard Cite

A bomb calorimeter is an apparatus used for measuring the performance of coal in term of heat of combustion. Recent awareness has been created regarding uncertainty of measurement, due to mainly two reasons. Laboratory accreditation, which has steadily been on the rise, which requires a estimation of uncertainty of measurement particularly in the field of calibration. Second, increased maturity level of the quality system certification as the manufacturing companies looking at the reliability of measurement through correct calibration of inspection, measuring and test equipment. The quality of coal is decided by the various parameters such as ash content, air dried moisture, volatile matter, gross calorific value and sulphur content etc. The grade of coal is decided by the quality of coal which decides the performance of generation of electricity. The uncertainty of measurement in bomb calorimeter gets affected by various parameters. This paper describes the methodology, uncertainty calculations and effects of individual factors on it.

show abstract

Mathematical Modeling of Effects of Various Factors on Uncertainty of Measurement in Material Testing

Cited by 4 publications

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Measurement uncertainty evaluation of automatic Tan Delta and resistivity test set for transformer oil

Measurement uncertainty evaluation of automatic Tan Delta and resistivity test set for transformer oil

Determination of Uncertainty in Gross Calorific Value of Coal Using Bomb Calorimeter

Determination of Uncertainty in Gross Calorific Value of Coal Using Bomb Calorimeter

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