Category Archives: Technical Bulletins

What is Calibration?

Description: Requirements for calibration appear in most national and international quality standards, and most organizations recognize that measuring equipment must be calibrated. However, there is much confusion regarding the definition of calibration, and this confusion increases quality-related risks to organizations. The purpose of this technical bulletin is to sort out all the different concepts that exist for the term calibration, including official definitions and those in common use. The primary technical basis for this document is ASME B89.7.1-2016, Guidelines for Addressing Measurement Uncertainty, which is one of the few documents that has tried to sort out the calibration conundrum. Download:  What is Calibration? The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration...

Decision Rules, TAR and TUR

Description: This technical bulletin addresses how measurement accuracy and uncertainty can be accounted for when making statements of conformity to specified requirements (In/Out tolerances or Pass/Fail decisions.) In particular, this technical bulletin explores one simple rule called the simple acceptance and refjection decision rule, which is the most commonly used decision rule in measurement practice. The technical basis for this document is the American national standard (ANSI standard) ASME B89.7.3.1-2001 Guidelines for Decision Rules, along with other historical documents. Download:  Decision Rules: TAR and TUR The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration methods and GD&T. We can be contacted via email at mim@mitutoyo.com, via phone at 888-MITUTOYO or 630-723-3620,...

Surface Plates – Accuracy and Calibration

Description: This technical bulletin addresses the accuracy and calibration of granite surface plates. The technical basis for this document is the American national standard (ANSI standard) entitled B89 .3.7-2013, Granite Surface Plates. This technical bulletin summarizes key technical issues; however, the ASME standard should be consulted for further information. Download:  Tech Bulletin - Accuracy and Calibration of Surface Plates The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration methods and GD&T. We can be contacted via email at mim@mitutoyo.com, via phone at 888-MITUTOYO or 630-723-3620, or visit the Education home page. Education Home

Calipers – Accuracy and Calibration

Description: This technical bulletin addresses the accuracy and calibration of digital, dial, and vernier calipers. The technical basis for this document is the American national standard (ANSI standard) entitled ASME B89.1.14-2018. This technical bulletin summarizes the most important technical issues; however, the ASME standard should be consulted for further information.           Download: Tech Bulletin - Accuracy and Calibration of Calipers The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration methods and GD&T. We can be contacted via email at mim@mitutoyo.com, via phone at 888-MITUTOYO or 630-723-3620, or visit the Education home page. Education... 						
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Profile Projectors – Accuracy and Calibration

Description: This technical bulletin addresses the accuracy and calibration of profile projectors, also known as optical comparators. No international or American national standard currently exists that addresses the specification of profile projectors. The technical basis for this document is the Japanese national standard on this topic, JIS B 7184:1999. This technical bulletin summarizes the most important technical issues; however, the JIS standard should be consulted for further information. accur_profile_projh Download:   Tech Bulletin - Accuracy of Profile Projectors The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration methods and GD&T. We can be contacted via email at mim@mitutoyo.com, via phone at 888-MITUTOYO...

Units and Conversions

Description: This technical bulletin addresses an important aspect of the language of measurement - the units applied when reporting or discussing measured values. unit_conv_pic Download:  Tech Bulletin - Units and Conversions The Mitutoyo Institute of Metrology provides educational courses and on-demand resources across a wide variety of measurement related topics including basic inspection techniques, principles of dimensional metrology, calibration methods and GD&T. We can be contacted via email at mim@mitutoyo.com, via phone at 888-MITUTOYO or 630-723-3620, or visit the Education home page. Education Home on_demand_logo...