Metrological Aspects in Calibration of Limit Measuring Instruments

Boris Katz, Metrology Consulting, Netanya, Israel (boriskatz123@gmail.com)

A common method of inspection by attributes involves the use of limit gauges, also known as fixed limit gauges or go/no-go gauges.  Limit gauges that used in metal industry, or sieves utilized in pharma industry all work according to the go/no-go principle.  It is very important to take uncertainty into account in the pass/fail decision.  The understanding of metrology chain "permissible deviation-measurement result-measurement uncertainty-TUR (Test Uncertainty Ratio)-conclusion (compliance with specification)" presents certain challenges in calibration and calibration certificate issuance.

Using of limit measuring instruments presents distinct separation of tested attributes in two categories: suitable and unsuitable. This discussion is regrading the approach and calibration policy of limit measuring instruments..

Keywords: calibration, limit gauges, Test Uncertainty Ratio.
 

Short Biography of Presenting Author

2018  Metrology Consulting

2008-2017 P.K. Labs. Certified Laboratory 2806, A2LA,Technical Manager

2000-2008 Quality Control Center Hazorea, Head of Force and Torque measurement Department

1992-2008 The Standards Institution of Israel, Calibration Laboratory, Head of Mechanical Brunch

2008-2016 College "Braude", Carmiel, Lecturer, Course "Metrology"

1977-1989 Research Institute of bearing industry, Metrology Engeneer.

1973-1977 Center of Metrology and Standardization

The member of Technical Committee 3 of International Measurement Confederation (IMEKO) –https://www.imeko.org/index.php/tc3-homepage/members-tc3