<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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% (<italic>k</italic> = 2) and it is traceable 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 2004, 2006, 2007, 2008, 2009 and 2010 and the results have been reported.</p></abstract>

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 traceable 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 2004, 2006, 2007, 2008, 2009 and 2010 and the results have been reported.

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

CSIR - National Physical Laboratory, New Delhi, India

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...

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
Force standard machine (FSM), force calibration machine (FCM), hydraulic multiplication system (HMS), best measurement capability (BMC), dead weights, uncertainty of measurement

This content is open access.

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

KeywordsForce standard machine (FSM), force calibration machine (FCM), hydraulic multiplication system (HMS), best measurement capability (BMC), dead weights, uncertainty of measurement

This content is open access.

Keywords
Force standard machine (FSM), force calibration machine (FCM), hydraulic multiplication system (HMS), best measurement capability (BMC), dead weights, uncertainty of measurement