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4. Derivative instruments
4.1 Pressure balance and liquid column manometer
Fundamental type instruments can be used as derivative instruments by calibrating them by direct comparison with a pressure standard. This is the most commonly used approach. Two calibration methods are available:
a "global" method in which the equivalent pressure, measured by the instrument in a given configuration and under defined reference conditions, is measured using the standard;
a method allowing a priori a better uncertainty, where the instrument parameters are calculated from the pressure measured by the standard.
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Derivative instruments
Calibration and verification methods
Bibliography
Standards and norms
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French and European standards. French Standards Association (AFNOR) http://www.afnor.fr
- Incertitude de mesure. Partie 3 : guide pour l'expression de l'incertitude de mesure (GUM : 1995). - NF ISO/IEC GUIDE 98-3 - 2014
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