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  • BSI
    BS 7118-2:1989, ISO 7066-2:1988 Measurement of fluid flow: assessment of uncertainty in the calibration and use of flow measurement devices - Non-linear calibration relationships
    Edition: 1989
    $435.35
    / user per year

Description of BS 7118-2:1989 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.

Standard NumberBS 7118-2:1989, ISO 7066-2:1988
TitleMeasurement of fluid flow: assessment of uncertainty in the calibration and use of flow measurement devices - Non-linear calibration relationships
StatusDefinitive
Publication Date1989-09-29
Identical National Standard OfISO 7066-2
DescriptorsPolynomials, Flow measurement, Regression analysis, Curve fitting, Calibration, Flowmeters, Computer applications, Statistical methods of analysis, Measurement characteristics, Accuracy, Estimation, Error analysis
ICS17.120.01 Measurement of fluid flow in general
CommitteeCPI/30
ISBN0 580 17382 8
PublisherBSI
Pages32

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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