Force calibration at the National Bureau of Standards

Abstract

Force calibration and force measurement services available at the National Bureau of Standards (NBS) are described.Direct deadweight calibrations of force sensors are performed in both compression and tension up to one million Ibf (4.4 MN) .Comparison calibrations relative to force sensor transfer standards are performed in compression up to 12 million Ibf (53 MN).In addition to force calibrations, the following tests are performed to further characterize force sensors: temperature sensitivity, pressure sensitivity, creep, and eccentric load sensitivity.Tests prescribed by the International Organization of Legal Metrology (OIML) for the classification of load cells used in electronic weighing systems are performed in compression for load capacities between about 26 klbf (116 kN) and 109 klbf (485 kN).The capabilities and limitations of the calibration and test facilities are briefly described.

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