06 Dec 2011   |   9:00 am,   -

Metrology Upgrading Programme - Uncertainty Evaluation for CMC Submissions of Electrical Calibrations and Measurements

Course Objective

In 2009, the International Laboratory Accreditation Cooperation (ILAC) and the Regional Accreditation Cooperation Bodies changed the definition of Best Measurement Capability (BMC) to Calibration and Measurement Capability (CMC). The former has been widely adopted by laboratory accreditation schemes, and the latter by metrology organisations and national metrology institutes. This change in definition, which Singapore Accreditation Council (SAC) has adopted, requires test and calibration laboratories in Singapore to re-evaluate their claims for accreditation, in order to comply to updated standards and guidelines.

While some laboratories have updated their claims in accordance with this change, most of the local laboratories are still facing difficulties in changing their full scope of claims.

The National Metrology Centre (NMC) organised this 1-day course to facilitate the local industry to prepare for this change to CMC definitions. The course reviews the basic steps in evaluating measurement uncertainties and emphasises how to compute CMC with inclusion of the contribution from the “best existing device” under calibration. Examples will be given to enhance the understanding of uncertainty evaluation steps and to analyse mistakes often encountered in practice.

Course Details

  • Concepts of Uncertainty in Measurements
  • Evaluation of Uncertainty Components and Probability Distribution of Measurand
  • Law of Propagation of Uncertainties and Sensitivity Coefficients
  • Level of Confidence and Expanded Uncertainty
  • Analyses of Uncertainty Sources with Examples in Electrical Measurements
  • Other Considerations in Computing CMCs
  • Update on CMC Migration, and Efficient Submission of CMC Data