Necessary and convenient number of indications in a measurement

8th Brazilian Congress on Metrology

Baratto, A.C.^1 ; Tarelho, L.V.G.^1 ; Garcia, G.A.^1

Divisao de Metrologia em Tecnologias da Informacao e Telecomunicacoes, Inmetro, Av. Nossa Senhora das Graças, 50, Duque de Caxias

RJ

25250-020, Brazil^1

关键词: Combined uncertainty;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012021/pdf
DOI  :  10.1088/1742-6596/733/1/012021

来源: IOP

【 摘 要 】

The work addresses the problem of how to properly stipulate a suitable number of indications or repetitions to be used in a measurement. This appropriate and adequate number of indications is understood and is proposed as the minimal number that induces, when the resulting Type A uncertainty is included in the calculation, a relative change in the preexisting combined uncertainty lower than some parameter Q. In its turn, the parameter Q is anticipated by the metrologist based on an analysis of the experimentational context in which the measurement is being made.