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Evaluation on the uncertainty of measurement for the density of PVC-U pipes by a dipping method

Bo Li

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Abstract

Sources of uncertainty in the measurement of the density of PVC-U pipes were analyzed according to GB 1033-1986——Test method for density and relative density.The uncertainty was evaluated.The results showed that the main sources of uncertainty of measurement were the error of balance weights and the error of unequal length of balance beam.Influences of the error of measurement repeatability and the change of indication value of balance on the uncertainty of measurement were small.

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Sources of uncertainty in the measurement of the density of PVC-U pipes were analyzed according to GB 1033-1986——Test method for density and relative density.The uncertainty was evaluated.The results showed that the main sources of uncertainty of measurement were the error of balance weights and the error of unequal length of balance beam.Influences of the error of measurement repeatability and the change of indication value of balance on the uncertainty of measurement were small.

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Available abstract

Sources of uncertainty in the measurement of the density of PVC-U pipes were analyzed according to GB 1033-1986——Test method for density and relative density.The uncertainty was evaluated.The results showed that the main sources of uncertainty of measurement were the error of balance weights and the error of unequal length of balance beam.Influences of the error of measurement repeatability and the change of indication value of balance on the uncertainty of measurement were small.

Key concepts: Repeatability, Measurement uncertainty, Standard uncertainty, Observational error, Uncertainty analysis, Environmental science, Balance (ability), Beam (structure)

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