Determination and calculation of uncertainties of measurement
Contents
- Definition of the measurand and measurement task
- Model formation, ideal model
- Normal and metrological traceability
- Determination of influence quantities
- Calculation type A: repeated measurements
- Determination of degrees of freedom
- Best estimate: arithmetic mean value
- Empirical standard deviation
- Standard uncertainty: standard deviation
- Type B: Data from other information sources
- Distribution functions (Gaussian distribution, rectangular distribution)
- Approach to rectangular distribution (width of distribution, half-width)
- Probability density function with coverage interval
- Consideration of correlated input variables
- Linearization of the model, sensitivity coefficients
- Compilation of the knowledge about the input variables
- Compilation of the uncertainty balance
- Specification of the complete measurement result (k-factor)
Agenda
- Basis: Calibration guideline "Calibration of pressure measuring instruments according to DKD-R 6-1"
- Physical basics of pressure measurement technology
- Functioning of analog and digital sensors
- Operation of piston pressure gauges
- Applications with pressure controller
- Metrological influences
- Standard measuring equipment
- Measuring setup
- Repeatability
- Hysteresis
- Measurement uncertainty balance
- Basics (normal distribution, rectangular distribution)
- Modeling
- Normal measurement equipment (calibration uncertainty, drift estimation)
- Calibration object (measurement, repeatability, hysteresis)
- Specification of the complete measurement result (k-factor)
Workshop
- Individual examples
- Measurement uncertainty balance with EXCEL
- Measurement uncertainty balance with GUM WorkBench
Aim of our training
- Realization of your tasks
- Exemplary creation of measurement uncertainty balances from your everyday life