INVESTIGATION OF THE MEASUREMENT UNCERTAINTY OF THE FORCE STANDARD MACHINES OF IPQ BY INTERCOMPARISON MEASUREMENTS WITH PTB

R. Kumme, L. Brito

Abstract

Two new deadweight force standard machines with capacities of 5 kN and 100 kN have been installed at IPQ. This paper describes the results of an intercomparison between the force standard machines of the National Metrology Institutes of Portugal (IPQ) and Germany (PTB). For the intercomparison, PTB used a set of force transfer standards which covered the whole force range from 50 N to 100 kN. The measurements were performed following the procedure used by PTB in intercomparison measurements. The influence of temperature differences in the various measurements was reduced by taking the temperature dependence of the force transducer sensitivity into account. This way of proceeding, considerable improved the results of the intercomparison and allowed relative deviations to be achieved which are smaller than the relative measurement uncertainty of the force standard machines.

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DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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