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BSI BS 7118-2:1989

Measurement of fluid flow: assessment of uncertainty in the calibration and use of flow measurement devices -- Non-linear calibration relationships
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BSI BS 7118-2:1989

Measurement of fluid flow: assessment of uncertainty in the calibration and use of flow measurement devices -- Non-linear calibration relationships

PUBLISH DATE 1989
BSI BS 7118-2:1989

This part of ISO 7066 describes the procedures for fitting a quadratic, cubic or higher degree polynomial expression to a non-linear2) set of calibration data, using the least-squares criterion, and of assessing the uncertainty associated with the resulting calibration curve. It considers only the use of polynomials with powers which are integers.

Because it is generally not practicable to carry out this type of curve fitting and assessment of uncertainty without using a computer, it is assumed in this part of ISO 7066 that the user has access to one. In many cases it will be possible to use standard routines available on most computers; as an alternative the FORTRAN program listed in Annex C may be used.

Examples of the use of these methods are given in Annex D.

Extrapolation beyond the range of the data is not permitted.

Annex A, Annex B, Annex C, Annex D and Annex E do not form integral parts of this part of ISO 7066.

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 assessing the uncertainty associated with the resulting calibration curve.
SDO BSI: British Standards Institution
Document Number 7118-2
Publication Date Sept. 29, 1989
Language en - English
Page Count
Revision Level
Supercedes
Committee CPI/30
Publish Date Document Id Type View
Sept. 29, 1989 BS 7118-2:1989 Revision