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MatroVal A Calibration Software With

MatroVal A Calibration Software With Advanced Uncertainty and Prediction Capabilities Including Complex Numbers. Alex Lepek Newton Metrology Ltd. Presentation Outline. Calibration Procedure Calibration Procedure linked to uncertainty analysis and prediction Types of uncertainty analysis

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MatroVal A Calibration Software With

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  1. MatroVal A Calibration Software With Advanced Uncertainty and Prediction Capabilities Including Complex Numbers Alex Lepek Newton Metrology Ltd www.NewtonMetrology.com

  2. Presentation Outline • Calibration Procedure • Calibration Procedure linked to uncertainty analysis and prediction • Types of uncertainty analysis • Prediction of aging and instability as an uncertainty component www.NewtonMetrology.com

  3. The Calibration Procedure Overview The calibration procedure is a table that is read line by line and cell by cell. Each cell Contains a parameter or instruction. The table can be prepared and linked automatically. www.NewtonMetrology.com

  4. Measurement repetitions Instrument adjustment? Instructions Compliance History file used for prediction Goes to Certificate Uncertainty file and page links Uncertainty method Calibration Procedure www.NewtonMetrology.com

  5. link link How does it work Read Procedure Table Measurand & Measurement System User setup Instructions Past calibrations of the system used for its prediction measure Predefined uncertainty budget template or equation and method Send measurements and other data (e.g. past calibrations) to uncertainty calculator Certificate / Report www.NewtonMetrology.com

  6. Unc. components Linking cal procedure, uncertainty and prediction a.his www.NewtonMetrology.com

  7. Description or instructions to user Components reference values Correlated components measured simultaneously and processed (e.g. sigma of difference) Measurements Entry fields Manual Calibration www.NewtonMetrology.com

  8. Using alternative template } Compliance Unc. Components Result www.NewtonMetrology.com

  9. Decision per ILAC G8 Can indicate k factor for each line Calibration results report generated by a template www.NewtonMetrology.com

  10. Available uncertainty methods • GUM (first order Taylor expansion). Expanded uncertainty computation includes correlations. C-sensitivities may be complex numbers. • Simplified Monte Carlo (assuming RSS equation). C-sensitivities may be complex numbers. • Monte-Carlo simulation directly from the measurement equation. Equation may include complex numbers. Distributions and reference values are given in the budget table.Best precision of results. www.NewtonMetrology.com

  11. c-sensitivity can be complex Deviation Methods: GUM and Monte-Carlo can be complex Uncertainty budget www.NewtonMetrology.com

  12. Uncertainty from measurement equation j Imaginary unit www.NewtonMetrology.com

  13. k, df, confidence Past Calibrations used for prediction and interval analysis Adjustment info www.NewtonMetrology.com

  14. Prediction result Past calibrations differences consider adj. Prediction Method Graphic presentation of a prediction www.NewtonMetrology.com

  15. Available Prediction Methods • Weighted Linear Regression, takes into consideration both regression statistics and measurement uncertainties. Best for white noise instabilities. • Weighted Linear Regression of Differences. Advantage when instrument passes occasional adjustments (“as received” and “as left”). Best for random walk instabilities. • The program can chose the best method and use it. www.NewtonMetrology.com

  16. Hands-on experience: download ‘MetroVal from http://www.NewtonMetrology.com www.NewtonMetrology.com

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