JJF 1130-2005
Guide to the Estimation of Uncertainty in Calibration of Geometrical Measuring Equipment (English Version)

Standard No.

JJF 1130-2005

Language

Chinese, Available in English version

Release Date

2005

Published By

National Metrological Technical Specifications of the People's Republic of China

Latest

JJF 1130-2005

Scope

As a guide for the application of the basic concepts of JJF 1059-1999 "Evaluation and Expression of Measurement Uncertainty" in calibration, this specification is applicable to the characteristics evaluation (calibration) activities of geometric quantity measuring equipment. The purpose of this specification is to give all the information for completing an uncertainty report and to provide a basis for international comparison of measurement results and their uncertainties (relationship between customers and suppliers). This specification contributes to the understanding of the maximum permissible error (MPE) of the metrological characteristics of measuring equipment. This specification adopts the Uncertainty Management Procedure (PUMA), which is a practical iterative procedure for evaluating measurement uncertainty based on JJF 1059-1999, and does not make any changes to the basic concepts of JJF 1059-1999. This specification is generally used for uncertainty assessment and uncertainty reporting in the following situations: 　——single measurement results; 　——comparison of two or more measurement results; 　——measurements obtained by one (or more) measuring equipment The results are compared with the specified technical indicators (i.e., the maximum allowable error (MPE) of the measurement characteristics of the measuring instrument or measuring standard, etc.) to determine whether the requirements are met. The iterative method of this specification is basically based on the assessment of the upper bound of uncertainty, that is, the uncertainty is overestimated at each stage of uncertainty assessment, and the degree of overestimation is controlled by the number of iterations. In order to avoid making erroneous judgments based on measurement results, the uncertainty is deliberately overestimated. The degree of overestimation depends on the economic evaluation of the specific circumstances. In calibration activities, the iterative method is a tool to obtain maximum benefits at minimum cost. Iterative methods or procedures are economically self-regulating. To reduce calibration costs, iterative methods are tools to change/reduce measurement uncertainty. In the assessment and allocation of measurement uncertainty, iterative methods make it possible to reconcile risks, effects and costs.

JJF 1130-2005 history

• 2005 JJF 1130-2005 Guide to the Estimation of Uncertainty in Calibration of Geometrical Measuring Equipment