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BSI PD ISO/TR 20461:2023

$142.49

Determination of uncertainty for volume measurements of a piston-operated volumetric apparatus using a gravimetric method

Published By Publication Date Number of Pages
BSI 2023 26
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PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 ​Scope
2 ​Normative references
3 ​Terms and definitions
4 ​Modelling the measurement
11 5 ​General procedure for the uncertainty calculation
6 ​Standard uncertainty components associated with the measuring system (gravimetric measurement procedure)
6.1 ​General information on standard uncertainty components estimation
12 6.2 ​Standard uncertainty of weighing (balance indication)
13 6.3 ​Standard uncertainty of temperature
6.4 ​Standard uncertainty of water density
14 6.5 ​Standard uncertainty of air density
6.6 ​Standard uncertainty of weights density
6.7 ​Standard uncertainty related to air cushion effects
15 7 ​Standard uncertainty components associated with the POVA
7.1 ​Standard uncertainty of cubic expansion coefficient
7.2 ​Standard uncertainty of resolution
7.3 ​Standard uncertainty of setting
8 ​Standard uncertainty components associated with the liquid delivery process
8.1 ​Repeatability (experimental standard deviation)
8.2 ​Reproducibility
16 9 ​Combined standard uncertainty of measurement associated with the volume Vref
10 ​Sensitivity coefficients
17 11 ​Choice of an appropriate coverage factor (k)
12 ​Expanded uncertainty of measurement associated with the volume Vref
13 ​Example for determining the uncertainty of the volume measurement of POVA
13.1 ​Measurement conditions
20 13.2 ​Results
13.2.1 ​Calculations
13.2.2 ​Uncertainty in use and corrections for pressure changes
13.2.3 ​General remarks
13.2.4 ​Note on the conformity of the ISO 8655 series with ISO/IEC Guide 98-3
21 Annex A (informative) Approaches for the estimation of uncertainty in use of a single delivered volume
24 Annex B (informative) Volume correction due to pressure changes
25 Bibliography
BSI PD ISO/TR 20461:2023
$142.49