Development of stepwise tolerances for efficient verification of automatic checkweigher

Tanaka, Yoshitada; Tanaka, Hideyuki

doi:10.1016/j.precisioneng.2021.06.010

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Thus, Desimoni and Brunetti [6] highlight the need to create or adopt unified guidelines for decision-making involving risk analysis and conformity assessment. Tanaka and Tanaka [7] show an approach to calculating the risks involved in the in-service verification/inspection of automatic check weighers. The study of the latest authors made it possible to reduce weighing, giving one more application to the theme.…”

Section: Introductionmentioning

confidence: 99%

Risk analysis in conformity assessment of positive displacement flowmeter

Chacon,

Oliveira,

Ozanan

et al. 2023

J. Phys.: Conf. Ser.

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Volume measurement of manufactured liquids and liquid raw materials carried out by road tankers (RT) is usual and has economic relevance, justifying the need to ensure metrological reliability. It requires some actions, including choosing suitable standards. In this scenario and considering the practice for type evaluation of measuring instruments, the article proposes a case study, analyzing performance data from a positive displacement meter, a measurement principle widely used as a standard in RT verifications. Current criteria of legal metrology were used: for the 0.3 accuracy class, the maximum permissible error (MPE) is 0.2%. The meter was tested with three different fluids (with different viscosities), and measurement errors were contrasted with the MPE specification, being considered compliant in all situations. On the other hand, risk analysis tools for conformity assessment were incorporated (JCGM 106) based on the different consumer risks, the formulated decision rule, and the measurement uncertainty. Even though, when including the risk analysis, the flowmeter was considered non-compliant, showing the need for a better basis decision using measurement uncertainty in legal metrology actions.

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Section: Introductionmentioning

confidence: 99%