Title: Rounding of Results and Measurement Uncertainties in Calibration Certificates : Guide DKD-L 13-3
Authors: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
Contributors: HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
Resource Type: Text / Technical Requirement
Publisher: Physikalisch-Technische Bundesanstalt (PTB)
Rights: https://creativecommons.org/licenses/by-nc-nd/3.0/de/
CC by-nc-nd 3.0
Relationships: IsVariantFormOf: DOI 10.7795/550.20211108
Dates: Available: 2022-01-13
Created: 2021-11
File: Download File (application/pdf) 291.37 kB (298362 Bytes)
MD5 Checksum: 753eba878484b9280e1dffbdb0bb9156
SHA256 Checksum: 92ced40d1b0420af420e3832f315993419fef25479cce7f71d6962690ca9dfed
Keywords DKD Guide ; rounding ; result ; measurement uncertainty ; calibration certificate ; DIN 1333 ; EN ISO 80000-1
Abstract: Measurement results are expressed as measured quantity value and measurement uncertainty (cf. International Vocabulary of Metrology, section 2.9) and form part of every calibration. Since representation with infinite accuracy (infinite number of places) is not possible, measurement results must inevitably be rounded. At the same time, it is necessary to adjust the number of digits of the measured value of the measurement result (result value) to the measurement uncertainty to avoid suggesting an uncertainty below its actual magnitude. This guide summarises normative rules and guideline specifications offering viable strategies and examples as a recommendation for proper rounding. In this guide, the term “measurement results” refers to all measured values and their associated measurement uncertainty clearly identified as such in the report stating the results. The guide does not describe the representation and rounding of indicated values (readings of a display), nominal values or (calculated) intermediate or auxiliary values for determining the measurement result.
Citation: Guide DKD-L 13-3 Rounding of results and measurement uncertainties in calibration certificates, Edition 11/2021, Revision 0, Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin. DOI: 10.7795/550.20220114