Abstract
Torque primary standard machines are established at CSIR-NPL, India to realize the torque scale and to disseminate the same for user industries for providing the traceability in torque measurement. Two torque machines, a primary standard machine comprising of elastic hinge supported load lever with scale pan having an uncertainty of ±0.01 % and a secondary standard machine comprising of an unsupported lever arm with a scale pan suspended by a knife edge having an uncertainty of ±0.05 %, are established. The uncertainty of these machines are estimated theoretically by considering the uncertainty contributions of various input quantities which is also reaffirmed through the inter-comparison carried out on these machines.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. Röske, Investigation of the Influence of Disturbing Components on the Torque Measurement, Proceedings of the 16th Imeko TC3 Conference, Taejon, Korea, (1998) 003280–285.
A. Brüge, D. Peschel, and D. Röske, The Influence of Misalignment on Torque Transducers, Proceedings of the 16th Imeko World Congress, vol. III, Vienna, Austria, (2000) 13–17.
B. Pratt and A. Robinson, A Comparison Between Supported and Unsupported Beams for Use in Static Torque Calibrations, Proceedings of the XVIII IMEKO World Congress, Brazil, (2006).
B. Pratt and A. Robinson, A Comparison Between Supported and Unsupported Beams for Use in Static Torque Calibrations, Measurement, 41 (2008) 1162–1168.
A. Brüge, D. Röske, D. Mauersberger, and K. Adolf, Influence of Cross Forces and Bending Moments on Reference Torque Sensors for Torque Wrench Calibration, Proceeding XIX IMEKO World Congress, Lisbon, Portugal, (2009) 356–361.
T. Sanponpute, C. Wattong, N. Saenkhum, and N. Arksonnarong, Confirming Accuracy Evaluation of Unsupported Beam Derived form Based Unit by Direct Comparison with Torque National Standard, Proceeding of the Asia-Pacific Symposium on Measurements of Mass, Force and Torque (APMP 2009), Tokyo, Japan, (2009) 269–274.
D. Peschel, The State of the Art and Future Developments of Metrology in the Field of Torque Measurements in Germany, Proceedings of the 14th IMEKO World Congress, Tampere, Finland, (1997) 65–71.
R.S. Davis, Equation for the Determination of the Density of Moist Air (1981/91), Metrologia, 29 (1992) 67–70.
G.P. Dixit, Estimation of Uncertainty in Torque Measurement—An Application of Universal Approach, MAPAN J. Metrol. Soc. India, 18 (2003) 83–92.
K.K. Jain, S.K. Jain, J.K. Dhawan, and A. Kumar, Realization Force Scale up to 50 kN through Dead Weight Force Machines at NPL India, MAPAN J. Metrol. Soc. India, 20 (2005) 249–257.
D. Röske, Final Report on the Torque Key Comparison CCM.T-K1.1: Measurand Torque: 0 Nm, 500 Nm, 1000 Nm, Metrologia, 47 (2010) Tech. Suppl., 07006.
DIN 51309 February 1998, “Materials Testing Machines, Calibration of Static Torque Measuring Devices.”
BS 7882: 2008, “Method for Calibration and Classification of Torque Measuring Devices.”
Acknowledgments
The authors would like to thank Prof. R.C.Budhani, Director, National Physical Laboratory for granting permission to publish the work. The authors are also thankful to Dr. K.K. Jain, former Head, Force and Hardness Standard, NPL for his valuable suggestions.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Titus, S.S.K., Jain, S.K. Establishment and Development of Torque Metrology in CSIR-NPL for Providing the Traceability in Torque Measurements to User Industries. MAPAN 28, 11–16 (2013). https://doi.org/10.1007/s12647-012-0029-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12647-012-0029-6