Development of a reference standard for the realization of negative gauge pressures

Purpose and goal

The project aims to develop a new reference method for the NMI´s realization of negative gauge pressure through true negative gauge. The methods currently applied are either very time-consuming or based on the measurements of two absolute pressures. Through this new method, the NMI for pressure will have an internationally accepted method for negative gauge that can be used in the entire range from -3.5 kPa to close to -95 kPa (depending on the current atmospheric pressure).

Expected effects and result

The development of a reference equipment of this type strengthens the efficiency, quality assurance and accessibility of the NMI in the area, with a new method that meets current and future requirements for implementation, traceability and uncertainties. The availability of another application for the implementation of negative gauge pressures also provides validation opportunities through comparison between the methods and contributes to an increase in competence at the NMI.

Planned approach and implementation

Initially, a small continued preliminary study of what has previously been done in the area by other NMIs and instrument manufacturers will be carried out, in parallel with the development of a design for the modification of existing equipment. The design and manufacturing of the parts for the new base and mass carrier will be done in consultation with RISE´s internal workshop. When the design is completed, its functionality will be validated and a comparison within EURAMET will be carried out.