Long Term Uncertainty Investigations of 1 MN Force Calibration Machine at NPL, India (NPLI)

Rajesh Kumar, Harish Kumar, Anil Kumar, Vikram
2012 Measurement Science Review  
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% (k = 2) and it is
more » ... ceable to national standards by means of precision force transfer standards (FTS). The present study discusses the uncertainty variations of the 1 MN HMS FCM over the years and describes the other parameters in detail, too. The 1 MN HMS FCM was calibrated in the years
doi:10.2478/v10048-012-0022-9 fatcat:sfj7unlbwfbwdmdkx66abh4vqu