NF ISO 7066-2

NF ISO 7066-2

December 1988
Standard Current

Assessment of uncertainty in the calibration and use of flow measurement devices. Part 2 : non-linear calibration relationships.

Describes the procedures for fitting a quadratic, cubic or higher degree polynomial expression to a non-linear set of calibration data, using the least-squares criterion, and of assessing the uncertainty associated with the resulting calibration curve. The method of fitting a straight line to flow measurement calibration data is dealt with in ISO 7066-1.

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Main informations

Collections

National standards and national normative documents

Publication date

December 1988

Number of pages

31 p.

Reference

NF ISO 7066-2

ICS Codes

17.120.10   Flow in closed conduits

Classification index

X10-108

Print number

1 - 01/12/1988

International kinship

ISO 7066-2:1988
Sumary
Assessment of uncertainty in the calibration and use of flow measurement devices. Part 2 : non-linear calibration relationships.

Describes the procedures for fitting a quadratic, cubic or higher degree polynomial expression to a non-linear set of calibration data, using the least-squares criterion, and of assessing the uncertainty associated with the resulting calibration curve. The method of fitting a straight line to flow measurement calibration data is dealt with in ISO 7066-1.

Table of contents
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  • 0 Introduction
    1
  • 1 Objet et domaine d'application
    1
  • 2 Références
    1
  • 3 Définitions
    1
  • 4 Symboles et abréviations
    1
  • 5 Ajustement de la courbe
    2
  • 5.1 Généralités
    2
  • 5.2 Méthodes de calcul
    3
  • 5.3 Choix du degré optimal d'ajustement
    3
  • 6 Incertitude
    4
  • Annexes
  • A Méthodes de régression
    5
  • B Ajustement des courbes par la méthode des polynômes orthogonaux
    9
  • C Programme d'ordinateur pour la méthode des polynômes orthogonaux
    11
  • D Exemples
    17
  • E Méthode des différences finies
    27
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