Wednesday, April 25, 2018
Topic: Understanding Recent Research on Test Uncertainty
Meeting Speaker: Dr. Craig Shakarji, National Institute of Standards and Technology (NIST)
The subject of test uncertainty is filled with subtleties that make it harder than it first appears. Even experts can disagree on what should be and should not be included as components of test uncertainty. A notable example is whether the repeatability of the instrument under test should be included. Recent research in answering these questions have led to the delineation of two schools of thought, which can be separated by a careful description of the measurand.
The participant should be able to:
- Identify two fundamentally different possible measurands when testing instruments to their accuracy specifications
- Know the different implications between the two
- Have tools to use to aid decisions as to what components should or should not be included in test uncertainty
Dr. Craig Shakarji is a mathematician at the National Institute of Standards and Technology. He has worked for 25 years in computational coordinate metrology and runs a NIST testing service for Coordinate Measuring System (CMS) software. Craig chairs the ISO working group on CMSs and participates in several ASME and ISO standards committees on uncertainty and dimensional metrology.
Topic: A Look at NIST’s Dimensional Metrology Group
Speaker: Daniel Sawyer, National Institute of Standards and Technology (NIST)
The Dimensional Metrology Group (DMG) at NIST has been responsible for realizing and disseminating the SI unit of length for U.S. industry, government, and educational and research institutions. Part of DMG’s efforts include developing measurement solutions for our customers’ most challenging measurement needs. DMG can serve this purpose because of a combination of some of the best equipment and environments plus a breadth and depth of technical expertise available to address these complex challenges. A brief look at the group’s activities will include a few examples of some of the more challenging measurements we’ve performed over the last few years and how organizations can partner with NIST to solve their own critical measurement needs.
The participant should be able to:
- Understand the calibration services and expertise available from DMG for solving non-commercially available measurement problems.
- Can identify two ways organizations can partner with NIST to address specific measurement needs
Mr. Daniel Sawyer is the Leader of the Dimensional Metrology Group in the Engineering Physics Division at NIST in Gaithersburg, MD. Dan has worked for over 20 years in performance evaluation of advanced coordinate measuring technologies and has authored and coauthored over 50 publications in various aspects of dimensional metrology. He is the Vice-Chairman of the American Society of Mechanical Engineers B89-1 Division on length, a member of the Coordinate Measuring Society Conference Executive Committee and one of the primary authors of the ASME B89.4.19 laser tracker standard.
High Voltage Walking Sticks
By: David Schurr, Exelon PowerLabs
To get a practical demonstration of the electrical path followed by a high voltage signal in a fun manner.
Drone Inspection Flight Demonstration
By: Alex Harvey, Exelon PowerLabs
To show a method to leverage new technology in a practical application
Topic: Good Weighing Practices
Speaker: David Cirullo, Global GWP Service Consultant, METTLER TOLEDO
Did you know that a balance calibration is incomplete without a correctly calculated, corresponding statement of measurement uncertainty? Most organizations still test and mathematically analyze electronic balance/scale test-data based on how mechanical balances were treated. The two types of equipment could not – metrologically – be more different! Many regulations and recommendations are still stuck in obsolete metrological methodology from the mechanical instrument era. The key question is: When testing a balance, do the results I achieve actually tell me what I think they do? The answer may surprise you!
During our brief session, we will analyze how measurement uncertainty exhibits itself across the linear capacity of an electronic balance or scale. We will cover how to assign a measurement uncertainty budget for an electronic weighing instrument using scientifically-sound, risk-based approaches to the assessment of the contributing, significant components of weighing measurement uncertainty. Commonly used terms such as: Minimum Weight, Smallest Net Weight and “Safety Factor” we discussed and in earnest and why they are so important in quality management of a weighing program. Just as importantly, many weighing instruments are often “Over tested”, without actually generating much, if any meaningful metrological data. Luckily, authorities are slowly waking up to this undeniable fact, and are starting to change standards, accordingly. A high majority of weighing inaccuracies are external to the balance, due to a variety of influences within the control of the instrument owner. It is very easy to create poor weight data! These phenomena are measurable and can be overcome with a little planning, and perhaps investment? We will discuss ways to protect and improve the weighing system, thus minimizing measurement uncertainty in the process.
Dave Cirullo has been with Mettler Toledo for 23 years, including many years spent as a lab field service technician and a lab field service manager. Dave is now Mettler Toledo’s Global GWP Service Consultant. His primary focus is facilitating Mettler Toledo’s Good Weighing Practice (GWP) service program that was developed to help the weighing community minimize weighing uncertainty and guarantee each weighing device is not only calibrated, but also appropriate for the weighing application for which it is being used.
Dave is extensively trained on the weighing chapters within the USP/NF. His training on uncertainty in mass measurement has enabled him to work with clients in different industries to assure best practices for their weighing processes, assure quality products, minimize waste and help achieve their business goals through accurate weighing. He is also responsible for delivering the SOP Writing Consultative Service. The SOP Consulting Service uses the GWP scientific platform, the risk of the weighing process and the weighing process requirements to give procedural guidance for scientifically sound life cycle management of weighing equipment.
Robotic Radiation Calibration
By: Harrison Long, Exelon PowerLabs
To show the safety requirements and technical aspects; perform-routine radiological calibrations.
Thursday, April 26, 2018
Topic: The Realization and Dissemination of the Unit of Mass in the Revised International System of Units
Speaker: Patrick Abbott, Mass Calibration Project Leader Mass & Force Group, National Institute of
Standards and Technology (NIST)
This presentation will provide information on the realization and dissemination of mass after the redefinition of the kilogram is adopted in 2019. Details will be presented on the motivation for redefining the unit of mass, and the and the experiments involved in tying the kilogram to an invariant of nature, the Planck constant. The consequences of the redefinition on uncertainties of the NIST mass scale and customer calibrations will also be presented.
- To understand the new definition of the kilogram.
- To be able to describe the effect of the redefinition on calibration uncertainties.
- To understand how the world’s mass scale will be maintained in light of independent realizations
Patrick Abbott received B.S. and M.S. degrees in Physics from Indiana University of Pennsylvania and The Pennsylvania State University respectively. He was a member of the Vacuum Group at Penn State where he studied low pressure measurement and residual gas analysis under Dr. Bruce Kendall. After working for Kodak in Rochester, NY and Measurement and Analysis Systems in Bellefonte, PA, Patrick became a member of the Pressure and Vacuum Group at NIST in 1992, where he was responsible for calibration of low pressure gauges and helium permeation leaks. Patrick joined the Mass & Force Group at NIST in 2007, and is currently the Mass Calibration Project Leader. Since joining the Mass & Force Group, he has worked on issues related to the redefinition of the kilogram including vacuum-to-air effects and stability of transfer standards. He has presented NIST work at domestic and international conferences including the International Bureau of Weights and Measures at Sevres, near Paris, France.
Topic: Humidity Theory and Measurement: Explore the Mysteries of Water Vapor, How to Measure It,
and Why we control it for Industrial Purposes
Speaker: Paul Daniel, Vaisala
- Understand the behavior of water vapor at a physical level to explain why humidity is a difficult measurement.
- Tour measurement technologies through time, and take an in-depth look at Vaisala’s innovative capacitive hygrometer design.
- Discuss some of the industrial impacts of humidity measurement and control.
Paul Daniel is the Senior Regulatory Compliance Expert at Vaisala. He has worked in regulated manufacturing industries for over 20 years helping companies apply good manufacturing practices in a wide range of commissioning projects. His specialties include environmental monitoring supported by networked computerized systems. At Vaisala, Paul assists with our Vaisala viewLinc environmental monitoring system. He also serves as a customer advocate to ensure the viewLinc products matches the demanding requirements of our regulated customers. Paul also shares his experience through regular blog contributions, webinars, and seminars around the world. Paul’s expertise is applicable to any industry where measurement is critical to product quality. Paul is a graduate of University of California, Berkeley.
Topic: Air Force Change Management Doctrine as Applied to the Metrology Career Field
Speaker: Birch Rypka, MSgt, United States Air Force, PMEL Quality Manager
- AF Change Management Doctrine Overview
- Application of AF Change Management Strategies to Calibration Laboratory Quality Programs
- Application of AF Change Management Strategies to Calibration Laboratory Management Systems
Birch Rypka is originally from Newtown, Connecticut and has been in the United States Air Force for over 18 years. He studied metrology, education, and human resource management at the Community College of the Air Force, aeronautics at Embry-Riddle Aeronautical University and business at Webster University. He has been a metrology technician, a laboratory section supervisor, a laboratory chief, a logistics manager, and has taught over 3.5K hours of advanced calibration curriculum for the Community College of the Air Force. Birch also spent three years as an Air Force human resource specialist. He has been stationed in California, Mississippi, Germany, South Korea and has deployed to Qatar. Birch currently serves as the Quality Assurance Section Chief at Joint Base McGuire-Dix-Lakehurst, New Jersey.
Demonstration: Dimensional Lab Basics
By: Cory Peters, Exelon PowerLabs
To give a “hands-on” demonstration of the basic types of instruments and units calibrated in a
dimensional metrology lab
Demonstration: Robotic Radiation Calibration
By: Harrison Long, Exelon PowerLabs
To show the safety requirements and technical aspects of perform-routine radiological