Long Term Uncertainty Investigations of 1 MN Force Calibration Machine at NPL, India (NPLI)
Published Online: Aug 13, 2012
Page range: 149 - 152
DOI: https://doi.org/10.2478/v10048-012-0022-9
Keywords
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The present paper is an attempt to study the long term uncertainty of 1 MN hydraulic multiplication system (HMS) force calibration machine (FCM) at the National Physical Laboratory, India (NPLI), which is used for calibration of the force measuring instruments in the range of 100 kN - 1 MN. The 1 MN HMS FCM was installed at NPLI in 1993 and was built on the principle of hydraulic amplifications of dead weights. The best measurement capability (BMC) of the machine is ± 0.025% (