Jeff Gust - Academia.edu (original) (raw)
Papers by Jeff Gust
NCSL International Workshop & Symposium Conference Proceedings 2013, 2013
The first Fluke 5700 series calibrator was manufactured in the late 1980’s. The metrology and ass... more The first Fluke 5700 series calibrator was manufactured in the late 1980’s. The metrology and associated test point selection for calibrating the product was rigorous by any standards, then or now. However, the calibration procedure that has been in place essentially since its initial release pre-dates significant advances in hardware, such as the Fluke Calibration 792A and 5790A, as well as ISO 17025, and the popularization of voluntary calibration laboratory accreditation. Fluke Calibration has re-visited the selection of test points in the calibration procedure to ensure that the result of any 5700 series calibrator would clearly demonstrate that all specifications have been verified, and that traceability for all functions is ensured. This was accomplished by an event that brought together representatives from Design Engineering, Test Engineering, Service Engineering, Service Metrology and Corporate Metrology. The group evaluated each specification, considered the internal archi...
29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 2014
Historically, analog null meters have been used to determine zero voltage conditions in metrologi... more Historically, analog null meters have been used to determine zero voltage conditions in metrological applications. When digital multimeters (DMMs) became available with resolution comparable to null meters, they were adopted quickly, and analog null meters were set aside. Depending on the circuit and the DMM, significant measurement errors can be introduced. This paper discusses in detail investigations associated with one particular model of precision DMM when used as a null detector and provides measurement configuration details to minimize errors so that the DMM can out-perform analog null meters.
2012 Conference on Precision electromagnetic Measurements, 2012
IEEE Transactions on Instrumentation and Measurement, 2013
NCSLI Measure, 2009
This discussion is intended to present the technical issues concerning the homogeneity and stabil... more This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
This discussion document is intended to present the technical issues concerning the homogeneity a... more This discussion document is intended to present the technical issues concerning the homogeneity and stability of proficiency test samples. It is intended also to lead to consensus recommendations concerning the resolution of these issues. These recommendations have served as guidance for the revisions of ILAC G13 and ISO/IEC Guide 43 (ISO/IEC 17043) and for use by ILAC member bodies in assessing the suitability of PT schemes used by accredited laboratories. International guidelines for the accreditation of providers of proficiency testing or external quality assessment schemes (PT) require providers to demonstrate both the homogeneity and the stability of proficiency testing samples. This is essential if PT is to serve its purpose and be able to identify errors in
Proficiency Testing (PT) is an excellent way to assure the quality of tests and calibration resul... more Proficiency Testing (PT) is an excellent way to assure the quality of tests and calibration results produced by a calibration laboratory. A properly constructed proficiency test is an independent and objective assessment of the participant's measurements and reporting of results. This presentation discusses the development of a temperature proficiency test that has been accredited by the American Association for Laboratory Accreditation (A2LA). The PT is intended to validate measurement uncertainties of participating laboratories in the range of 10 to 100 mK, in which a secondary reference Platinum Resistance Thermometer (100 ohm) is used as an artifact. The PT design, development, execution, quality assurance, analysis and report of results will be discussed. Anonymous data will be presented for the laboratory results of the proficiency test, and there will be a discussion of common mistakes that laboratories have made that cause unacceptable test results. Typical measurement ...
The COVID-19 pandemic has caused a renewed interest in Elevated Skin Temperature (EST) screening ... more The COVID-19 pandemic has caused a renewed interest in Elevated Skin Temperature (EST) screening systems using infrared cameras. A standard for infrared EST system performance exists (IEC 80601-2-59) but few commercially available systems meet all the performance requirements of this standard. FDA researchers [Ghassemi et al.], in 2018, tested two commercially available EST systems to the IEC standard. They concluded the systems largely met the IEC standards but identified several ambiguities in the standard and, for some tests, proposed alternate test methods and criteria. Later they used these two systems in a large-scale clinical study testing the effectiveness for fever screening by comparing to oral temperature measurements [Zhou et al.]. In this paper we review the Ghassemi IEC test results and build on their work by recommending even further changes and clarifications to the IEC standard. Rationale for the recommended changes is illustrated with example test data collected us...
Journal of Teacher Education, 2016
s are currently being accepted for the 2003 NCS LI W&S ; the deadline for submission is December ... more s are currently being accepted for the 2003 NCS LI W&S ; the deadline for submission is December 16, 2002. Please refer to the instructions for submitt ing abstracts on the NCS LI website ; < htlp ://www.ncsli .org/conference/2003/ >. It is expected that there will be two chemical metr ology ses sions held during the wo rkshop.
Abstract: This discussion is intended to present the technical issues concerning the homogeneity ... more Abstract: This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
Certain commercial entities, equipment, or materials may be identified in this document in order ... more Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. iii FOREWORD Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizational metrology requirements. However, until now, no definitive text has existed on the subject. This NIST Recommended Practice Guide was created to a fill a gap in the metrology literature. It assists the working metrologist or calibration technician by describing the types of stopwatches and timers that require calibratio...
This discussion is intended to present the technical issues concerning the homogeneity and stabil... more This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
Proficiency Testing is an excellent way to assure the quality of tests and calibration results pr... more Proficiency Testing is an excellent way to assure the quality of tests and calibration results produced by a calibration laboratory. A properly constructed proficiency test is an independent and objective assessment of the participant's measurements and reporting of results. This presentation discusses the development of a resistance proficiency test (PT) that has been accredited by the American Association for Laboratory Accreditation (A2LA). The PT is intended to validate measurement uncertainties of participating laboratories in the range of 8 parts in 10 6 to 100 parts in 10 6 . The PT design, development, execution, quality assurance, analysis and report of results will be discussed. Anonymous data will be presented for the laboratory results of the proficiency test, and there will be a discussion of common mistakes that laboratories have made that cause unacceptable test results.
There is a draft resolution from the General Conference of Weights and Measures (CGPM) inviting t... more There is a draft resolution from the General Conference of Weights and Measures (CGPM) inviting the International Committee of Weights and Measures (CIPM) to propose a revision of the International System of Units (SI). While the actual implementation of any such change is still years away, it is important to plan how the communication of the changes and implementation of the revision would actually occur. The proposed revision to the SI has been widely discussed at National Measurement Institutes (NMI’s) and to a lesser extent, industry. Although the magnitude of the changes in the proposal are generally too small to be seen by most industrial organizations, it is important to communicate why the change is being made, how it will occur, and what organizations must do in order to maintain traceability to the SI. This paper provides background information regarding the possible changes to the SI, and Fluke’s role in realizing the changes. It identifies industrial measurements that ma...
NCSL International Workshop & Symposium Conference Proceedings 2013, 2013
The first Fluke 5700 series calibrator was manufactured in the late 1980’s. The metrology and ass... more The first Fluke 5700 series calibrator was manufactured in the late 1980’s. The metrology and associated test point selection for calibrating the product was rigorous by any standards, then or now. However, the calibration procedure that has been in place essentially since its initial release pre-dates significant advances in hardware, such as the Fluke Calibration 792A and 5790A, as well as ISO 17025, and the popularization of voluntary calibration laboratory accreditation. Fluke Calibration has re-visited the selection of test points in the calibration procedure to ensure that the result of any 5700 series calibrator would clearly demonstrate that all specifications have been verified, and that traceability for all functions is ensured. This was accomplished by an event that brought together representatives from Design Engineering, Test Engineering, Service Engineering, Service Metrology and Corporate Metrology. The group evaluated each specification, considered the internal archi...
29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 2014
Historically, analog null meters have been used to determine zero voltage conditions in metrologi... more Historically, analog null meters have been used to determine zero voltage conditions in metrological applications. When digital multimeters (DMMs) became available with resolution comparable to null meters, they were adopted quickly, and analog null meters were set aside. Depending on the circuit and the DMM, significant measurement errors can be introduced. This paper discusses in detail investigations associated with one particular model of precision DMM when used as a null detector and provides measurement configuration details to minimize errors so that the DMM can out-perform analog null meters.
2012 Conference on Precision electromagnetic Measurements, 2012
IEEE Transactions on Instrumentation and Measurement, 2013
NCSLI Measure, 2009
This discussion is intended to present the technical issues concerning the homogeneity and stabil... more This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
This discussion document is intended to present the technical issues concerning the homogeneity a... more This discussion document is intended to present the technical issues concerning the homogeneity and stability of proficiency test samples. It is intended also to lead to consensus recommendations concerning the resolution of these issues. These recommendations have served as guidance for the revisions of ILAC G13 and ISO/IEC Guide 43 (ISO/IEC 17043) and for use by ILAC member bodies in assessing the suitability of PT schemes used by accredited laboratories. International guidelines for the accreditation of providers of proficiency testing or external quality assessment schemes (PT) require providers to demonstrate both the homogeneity and the stability of proficiency testing samples. This is essential if PT is to serve its purpose and be able to identify errors in
Proficiency Testing (PT) is an excellent way to assure the quality of tests and calibration resul... more Proficiency Testing (PT) is an excellent way to assure the quality of tests and calibration results produced by a calibration laboratory. A properly constructed proficiency test is an independent and objective assessment of the participant's measurements and reporting of results. This presentation discusses the development of a temperature proficiency test that has been accredited by the American Association for Laboratory Accreditation (A2LA). The PT is intended to validate measurement uncertainties of participating laboratories in the range of 10 to 100 mK, in which a secondary reference Platinum Resistance Thermometer (100 ohm) is used as an artifact. The PT design, development, execution, quality assurance, analysis and report of results will be discussed. Anonymous data will be presented for the laboratory results of the proficiency test, and there will be a discussion of common mistakes that laboratories have made that cause unacceptable test results. Typical measurement ...
The COVID-19 pandemic has caused a renewed interest in Elevated Skin Temperature (EST) screening ... more The COVID-19 pandemic has caused a renewed interest in Elevated Skin Temperature (EST) screening systems using infrared cameras. A standard for infrared EST system performance exists (IEC 80601-2-59) but few commercially available systems meet all the performance requirements of this standard. FDA researchers [Ghassemi et al.], in 2018, tested two commercially available EST systems to the IEC standard. They concluded the systems largely met the IEC standards but identified several ambiguities in the standard and, for some tests, proposed alternate test methods and criteria. Later they used these two systems in a large-scale clinical study testing the effectiveness for fever screening by comparing to oral temperature measurements [Zhou et al.]. In this paper we review the Ghassemi IEC test results and build on their work by recommending even further changes and clarifications to the IEC standard. Rationale for the recommended changes is illustrated with example test data collected us...
Journal of Teacher Education, 2016
s are currently being accepted for the 2003 NCS LI W&S ; the deadline for submission is December ... more s are currently being accepted for the 2003 NCS LI W&S ; the deadline for submission is December 16, 2002. Please refer to the instructions for submitt ing abstracts on the NCS LI website ; < htlp ://www.ncsli .org/conference/2003/ >. It is expected that there will be two chemical metr ology ses sions held during the wo rkshop.
Abstract: This discussion is intended to present the technical issues concerning the homogeneity ... more Abstract: This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
Certain commercial entities, equipment, or materials may be identified in this document in order ... more Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. iii FOREWORD Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizational metrology requirements. However, until now, no definitive text has existed on the subject. This NIST Recommended Practice Guide was created to a fill a gap in the metrology literature. It assists the working metrologist or calibration technician by describing the types of stopwatches and timers that require calibratio...
This discussion is intended to present the technical issues concerning the homogeneity and stabil... more This discussion is intended to present the technical issues concerning the homogeneity and stability of artifacts that are used primarily for proficiency testing of calibration laboratories. It is also intended to make consensus recommendations concerning the resolution of these issues. These recommendations are intended for use as guidance for the application of a proficiency testing scheme that meets the requirements of ISO/IEC Guide 43-1:1997 and ILAC G13:2000.
Proficiency Testing is an excellent way to assure the quality of tests and calibration results pr... more Proficiency Testing is an excellent way to assure the quality of tests and calibration results produced by a calibration laboratory. A properly constructed proficiency test is an independent and objective assessment of the participant's measurements and reporting of results. This presentation discusses the development of a resistance proficiency test (PT) that has been accredited by the American Association for Laboratory Accreditation (A2LA). The PT is intended to validate measurement uncertainties of participating laboratories in the range of 8 parts in 10 6 to 100 parts in 10 6 . The PT design, development, execution, quality assurance, analysis and report of results will be discussed. Anonymous data will be presented for the laboratory results of the proficiency test, and there will be a discussion of common mistakes that laboratories have made that cause unacceptable test results.
There is a draft resolution from the General Conference of Weights and Measures (CGPM) inviting t... more There is a draft resolution from the General Conference of Weights and Measures (CGPM) inviting the International Committee of Weights and Measures (CIPM) to propose a revision of the International System of Units (SI). While the actual implementation of any such change is still years away, it is important to plan how the communication of the changes and implementation of the revision would actually occur. The proposed revision to the SI has been widely discussed at National Measurement Institutes (NMI’s) and to a lesser extent, industry. Although the magnitude of the changes in the proposal are generally too small to be seen by most industrial organizations, it is important to communicate why the change is being made, how it will occur, and what organizations must do in order to maintain traceability to the SI. This paper provides background information regarding the possible changes to the SI, and Fluke’s role in realizing the changes. It identifies industrial measurements that ma...