8. Glossary
Balance de pression ou balance manométrique ; Pressure balance or piston gauge
A standard used to materialize pressure from the basic quantities of the SI system. The principle consists in balancing the force generated by the pressure applied to the cross-section of a piston-cylinder assembly with the force due to the local field of gravity acting on the masses resting on the piston head.
Pressure distortion coefficient; Coefficient de déformation
Coefficient associated with a piston-cylinder assembly representing the variation in cross-section due to pressure, expressed in Pa –1 .
Ensemble piston-cylindre ; Piston-cylinder unit
The main metrological element of the manometric balance, the pressure delivered by the standard...
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