ERROR LIMITS AND MEASUREMENT UNCERTAINTY IN LEGAL METROLOGY |
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| K.-D. Sommer, M. Kochsiek, W. Schulz |
- Abstract:
- Quality statements for calibrated measuring instruments give the systematic error and the uncertainty of measurement at the moment of calibration. In contrast to this, the statement of conformity for verified measuring instruments indicates whether or not the error limits on verification specified by law are exceeded. The conformity assessment is based on the result of a previous calibration. The calibration uncertainty thus becomes an uncertainty of conformity decision. There is, therefore, a certain risk for the manufacturer that acceptable instruments might be rejected. The probability of this is calculated from the uncertainty of measurement and the spread of the errors of measurement of the measuring instrument population to be tested. For the instrument user the maximum permissible error in service applies. There is, therefore, practically no risk, in the sense that no measured value – even allowing for the measurement uncertainty – will be outside this tolerance band.
- Keywords:
- legal metrology, error limits, uncertainty, verification, conformity, risk
- Download:
- IMEKO-WC-2000-UNC-P520.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000