Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.15
P. Packebush
System downtime is so critical that most customers are as sensitive to turnaround time as they are price when it comes to equipment service. This requires companies to consider the best way to implement local service offerings if they expect to compete in the global instrument market. The cost to create local solutions often leads to an attempt at centralized, regional, services to control expense while gaining market share. This solution typically works within a country, but suffers significant drawbacks when equipment is shipped across borders. Facing this problem, National Instruments (NI) Calibration Services grows its global service program through a combination of NI owned facilities and partnering with local and regional laboratories. This paper explores the challenges and solutions in growing a global services organization that leverages partners. Solving partner training, ensuring technical quality, and managing logistics are all part of creating a successful global footprint. These topics and a discussion of import/export requirements highlighting the challenges of logistics is reviewed.
{"title":"Maintaining Quality in a Global Calibration Partner Program","authors":"P. Packebush","doi":"10.51843/wsproceedings.2017.15","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.15","url":null,"abstract":"System downtime is so critical that most customers are as sensitive to turnaround time as they are price when it comes to equipment service. This requires companies to consider the best way to implement local service offerings if they expect to compete in the global instrument market. The cost to create local solutions often leads to an attempt at centralized, regional, services to control expense while gaining market share. This solution typically works within a country, but suffers significant drawbacks when equipment is shipped across borders. Facing this problem, National Instruments (NI) Calibration Services grows its global service program through a combination of NI owned facilities and partnering with local and regional laboratories. This paper explores the challenges and solutions in growing a global services organization that leverages partners. Solving partner training, ensuring technical quality, and managing logistics are all part of creating a successful global footprint. These topics and a discussion of import/export requirements highlighting the challenges of logistics is reviewed.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"2417 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130319313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.34
Margaret K. E. Edwards
Multijunction thermal converters (MJTCs) used as AC-DC transfer devices are the most accurate wideband standards for precision AC measurements. Due to their high accuracy and broadband capability, MJTCs are used as the primary standards for AC-DC difference metrology at the National Institute of Standards and Technology (NIST). To determine the useful lifetime of these devices, a microcontroller test was designed to stress an MJTC under its routine operational conditions over an extended time period. This paper illustrates the long-term stability and accuracy maintained by the MJTC when operated within its specified parameters. Results indicate the lifespan of these reference instruments extends beyond 90 years for devices averaging 4 cycles per workday over the duration of a year.
{"title":"Accelrated Life Testing of Muktijunction Thermal Converters with a Microcontroller","authors":"Margaret K. E. Edwards","doi":"10.51843/wsproceedings.2017.34","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.34","url":null,"abstract":"Multijunction thermal converters (MJTCs) used as AC-DC transfer devices are the most accurate wideband standards for precision AC measurements. Due to their high accuracy and broadband capability, MJTCs are used as the primary standards for AC-DC difference metrology at the National Institute of Standards and Technology (NIST). To determine the useful lifetime of these devices, a microcontroller test was designed to stress an MJTC under its routine operational conditions over an extended time period. This paper illustrates the long-term stability and accuracy maintained by the MJTC when operated within its specified parameters. Results indicate the lifespan of these reference instruments extends beyond 90 years for devices averaging 4 cycles per workday over the duration of a year.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130652850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.38
Terry Hau Wah LAI
This paper demonstrates the essential procedures in the Hong Kong Standards and Calibration Laboratory for the calibration of an electrostatic discharge (ESD) generator in accordance with the International Standard IEC 61000-4-2 Edition 2.0 (2008-12) of electromagnetic compatibility. All the required instruments and special precautions to perform the calibration are listed clearly. The performance of an ESD generator has been tested and reported by following the requirement of the standard. The corresponding results, including the waveform parameters of the current discharge pulse and the DC high voltage test of the ESD generator before discharge with different voltages setting, are reported. The measurement uncertainties of the calibration are clearly listed in this paper, and they are evaluated in accordance with the document "Guide to the Expression of Uncertainty in Measurement (GUM)". The expanded measurement uncertainty U, with level of confidence of approximate 95 %probability is used in the calibration.
{"title":"Calibration of Electrostatic Discharge (ESD) Generator in Accordance with IEC61000-4-2: 2008","authors":"Terry Hau Wah LAI","doi":"10.51843/wsproceedings.2017.38","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.38","url":null,"abstract":"This paper demonstrates the essential procedures in the Hong Kong Standards and Calibration Laboratory for the calibration of an electrostatic discharge (ESD) generator in accordance with the International Standard IEC 61000-4-2 Edition 2.0 (2008-12) of electromagnetic compatibility. All the required instruments and special precautions to perform the calibration are listed clearly. The performance of an ESD generator has been tested and reported by following the requirement of the standard. The corresponding results, including the waveform parameters of the current discharge pulse and the DC high voltage test of the ESD generator before discharge with different voltages setting, are reported. The measurement uncertainties of the calibration are clearly listed in this paper, and they are evaluated in accordance with the document \"Guide to the Expression of Uncertainty in Measurement (GUM)\". The expanded measurement uncertainty U, with level of confidence of approximate 95 %probability is used in the calibration.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"26 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132972987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.32
Hsiu-lin Lin
There are several techniques for measuring and characterizing the nanoparticle sizes. However, these measurement results for same nanoparticles may deviate from each other at an amount that is considered significant. To establish the effectiveness and comparability of measurement methods on nanoparticles, the Center for Measurement Standards of Industrial Technology Research Institute (CMS/ITRI) conducted three inter laboratory comparisons on nano particle size measurements in 2005, 2006 and 2012. In 2005, an APEC-led preliminary inter laboratory comparison on nanoparticle size characterization was carried out among 10 laboratories from 6 economies. In 2006, the interlaboratory comparison was carried out for the second time with a more focused objective of detailing instrument-specific measurement instructions for enhancing the comparability among different types of measurement methods. There were 16 laboratories from 10 economies participating in that comparison. In 2012, to harmonize the measurement techniques and capabilities on nanoparticle size, an APMP supplementary comparison was held among 14 national measurement laboratories. In this paper, statistical analysis was carried out to identify that the nanoparticle size measured from Dynamic Light Scattering (DLS) was generally larger than the sizes measured from other measurement techniques including Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microcopy(AFM), Differential Mobility Analyzer (DMA), and Small-Angle X-ray Scattering (SAXS).
{"title":"The Comparison of Different Types of Instruments on Nanoparticle Size Measurements through Interlaboratory Comparisons ","authors":"Hsiu-lin Lin","doi":"10.51843/wsproceedings.2017.32","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.32","url":null,"abstract":"There are several techniques for measuring and characterizing the nanoparticle sizes. However, these measurement results for same nanoparticles may deviate from each other at an amount that is considered significant. To establish the effectiveness and comparability of measurement methods on nanoparticles, the Center for Measurement Standards of Industrial Technology Research Institute (CMS/ITRI) conducted three inter laboratory comparisons on nano particle size measurements in 2005, 2006 and 2012. In 2005, an APEC-led preliminary inter laboratory comparison on nanoparticle size characterization was carried out among 10 laboratories from 6 economies. In 2006, the interlaboratory comparison was carried out for the second time with a more focused objective of detailing instrument-specific measurement instructions for enhancing the comparability among different types of measurement methods. There were 16 laboratories from 10 economies participating in that comparison. In 2012, to harmonize the measurement techniques and capabilities on nanoparticle size, an APMP supplementary comparison was held among 14 national measurement laboratories. In this paper, statistical analysis was carried out to identify that the nanoparticle size measured from Dynamic Light Scattering (DLS) was generally larger than the sizes measured from other measurement techniques including Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microcopy(AFM), Differential Mobility Analyzer (DMA), and Small-Angle X-ray Scattering (SAXS).","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132319206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.40
G. Mihm
resources and to provide calibration services consistent with ISO 17025 the International Military Metrology conference on behalf of NATO Conference of National Armament Directors set up a series of new NATO Standard for calibration requirements AlogP-33 "NATO REQUIREMENTS FOR CALIBRATION SUPPORT OF TEST & MEASUREMENT EQUIPMENT" with new format for calibration certificates, new calibration label and methods used to determine the appropriate calibration intervals of test & measurement equipment. The presentation, reflecting the content of ALogP-33, details the creation and need for the new calibration certificate but also the responsibility of the owner of test & measurement equipment and of the service provider. Within ALogP-33.2 methods used to determine the appropriate calibration interval, based on RP-1, puts the burden on the owner of the test & measurement equipment to include the environmental condition of the test & measurement equipment used.
{"title":"New NATO Standard ALogP-33 NATO Requirements for Calibration Support of Test & Measurement Equipment ","authors":"G. Mihm","doi":"10.51843/wsproceedings.2017.40","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.40","url":null,"abstract":"resources and to provide calibration services consistent with ISO 17025 the International Military Metrology conference on behalf of NATO Conference of National Armament Directors set up a series of new NATO Standard for calibration requirements AlogP-33 \"NATO REQUIREMENTS FOR CALIBRATION SUPPORT OF TEST & MEASUREMENT EQUIPMENT\" with new format for calibration certificates, new calibration label and methods used to determine the appropriate calibration intervals of test & measurement equipment. The presentation, reflecting the content of ALogP-33, details the creation and need for the new calibration certificate but also the responsibility of the owner of test & measurement equipment and of the service provider. Within ALogP-33.2 methods used to determine the appropriate calibration interval, based on RP-1, puts the burden on the owner of the test & measurement equipment to include the environmental condition of the test & measurement equipment used.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"14 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113970838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.18
Travis Gossman
At the 2007 NCSLI Workshop and Symposium, Dr. Howard Castrup, in his presentation on ANSI/NCSL Z540.3, remarked to the audience "Don’t just make us report measurement uncertainty and then do nothing with that value." Ten years after that presentation, the calibration industry still struggles to heed Dr. Castrup’s advice. Much confusion remains on why there is more than just reporting an uncertainty value. There are three key areas that will be looked at in this paper: The contract review process, measurement uncertainty, and measurement decision risk. The goal is to inform the reader how these three concepts are related to each, how they affect the overall calibration process, and why this is important. Both the customer and the calibration lab have a responsibility to ensure that the proper measurement decision risk levels are set, communicated, and understood. Once the risk level is established and communicated, the calibration lab will then perform a calibration service that stays within the bounds of that risk level. The goal is to produce a calibration service that is both traceable and meets the customer's measurement decision risk requirement. And lastly, a calibration report must be generated containing the appropriate information.
{"title":"An Intersection: The Contract Review Process, Measurement Decision Risk, and Measurement Uncertainty","authors":"Travis Gossman","doi":"10.51843/wsproceedings.2017.18","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.18","url":null,"abstract":"At the 2007 NCSLI Workshop and Symposium, Dr. Howard Castrup, in his presentation on ANSI/NCSL Z540.3, remarked to the audience \"Don’t just make us report measurement uncertainty and then do nothing with that value.\" Ten years after that presentation, the calibration industry still struggles to heed Dr. Castrup’s advice. Much confusion remains on why there is more than just reporting an uncertainty value. There are three key areas that will be looked at in this paper: The contract review process, measurement uncertainty, and measurement decision risk. The goal is to inform the reader how these three concepts are related to each, how they affect the overall calibration process, and why this is important. Both the customer and the calibration lab have a responsibility to ensure that the proper measurement decision risk levels are set, communicated, and understood. Once the risk level is established and communicated, the calibration lab will then perform a calibration service that stays within the bounds of that risk level. The goal is to produce a calibration service that is both traceable and meets the customer's measurement decision risk requirement. And lastly, a calibration report must be generated containing the appropriate information.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125828541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.26
S. Klenovská
In the globalized world mutual recognition arrangements (MRAs) at various levels concerning measurement and testing certificates play a crucial role in elimination of technical barriers to trade and in this context proficiency testing, PT(interlaboratory comparisons, ILCs, in calibration) have recently emerged as one of the most objective and effective methods of assessment of technical competence of laboratories. The European Cooperation for Accreditation (EA)decided in 2006 to put under test the validity of its part of the ILAC MRA by organizing EA-sponsored ILCs in Europe • at that time ILCs in physical metrology were quite scarce and EUROMET (at that time) was unwilling to take it over. The basic idea was that individual EA member accreditation bodies (ABs) would nominate calibration labs accredited by them to take part in such ILCs and external ILC providers (preferably those accredited according to EN ISO/IEC 17043)would be contracted to organize them on the EA's behalf. EA set up a corresponding working group called EA LC wg ILC(calibration and testing) to facilitate the process to avoid pitfalls experienced here in the past.
在全球化的世界中，有关测量和测试证书的各级相互承认安排(MRAs)在消除技术贸易壁垒方面发挥着至关重要的作用，在这种情况下，能力测试，PT(实验室间比较，ilc，校准)最近成为评估实验室技术能力的最客观和有效的方法之一。欧洲认可合作组织(EA)于2006年决定通过在欧洲组织EA赞助的ilc来测试其ILAC MRA部分的有效性。当时物理计量领域的ilc相当稀缺，而EUROMET(当时)不愿意接管它。基本的想法是，个别的EA成员认可机构(ABs)将提名经其认可的校准实验室参加这些ILC，而外部的ILC提供者(最好是根据EN ISO/IEC 17043认可的)将签约代表EA组织这些ILC。EA建立了一个相应的工作组，称为EA LC wg ILC(校准和测试)，以促进该过程，避免过去在这里遇到的陷阱。
{"title":"EA-Sponsored Interlaboratory Comparisons in Europe: The Process and the Lessons Learned","authors":"S. Klenovská","doi":"10.51843/wsproceedings.2017.26","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.26","url":null,"abstract":"In the globalized world mutual recognition arrangements (MRAs) at various levels concerning measurement and testing certificates play a crucial role in elimination of technical barriers to trade and in this context proficiency testing, PT(interlaboratory comparisons, ILCs, in calibration) have recently emerged as one of the most objective and effective methods of assessment of technical competence of laboratories. The European Cooperation for Accreditation (EA)decided in 2006 to put under test the validity of its part of the ILAC MRA by organizing EA-sponsored ILCs in Europe • at that time ILCs in physical metrology were quite scarce and EUROMET (at that time) was unwilling to take it over. The basic idea was that individual EA member accreditation bodies (ABs) would nominate calibration labs accredited by them to take part in such ILCs and external ILC providers (preferably those accredited according to EN ISO/IEC 17043)would be contracted to organize them on the EA's behalf. EA set up a corresponding working group called EA LC wg ILC(calibration and testing) to facilitate the process to avoid pitfalls experienced here in the past.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121706764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.12
G. Mihm
In 2015 the existing scale for aircraft weighing failed calibration. The item was calibrated to the European standard for pressure calibration. This standard is more precise than the international standard. New items of same manufacturer passed calibration by the manufacturer and the international standard but also failed the European standard. Intensive market research showed that there is no scale on the market calibrated to the European standard with the precision needed. German Armed Forces was forced to look for a company with enough experience in the construction of pressure scales to construct the scale needed. The presentation will demonstrate the way of procurement of the scales, and also discuss solving problems that arose in getting the item into service.
{"title":"Development of a New Scale for Aircraft Weighing","authors":"G. Mihm","doi":"10.51843/wsproceedings.2017.12","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.12","url":null,"abstract":"In 2015 the existing scale for aircraft weighing failed calibration. The item was calibrated to the European standard for pressure calibration. This standard is more precise than the international standard. New items of same manufacturer passed calibration by the manufacturer and the international standard but also failed the European standard. Intensive market research showed that there is no scale on the market calibrated to the European standard with the precision needed. German Armed Forces was forced to look for a company with enough experience in the construction of pressure scales to construct the scale needed. The presentation will demonstrate the way of procurement of the scales, and also discuss solving problems that arose in getting the item into service.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124081125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.27
B. Wood
In November 2018 representatives from over 58 countries will meet to approve a major revision to our international measurement system, the SI. This redefinition will be the most sweeping change in the last 140 years and remove the last defining artifact from the SI. In essence there definition of the SI will set the exact values of seven constants, five of which are fundamental constants of physics. This will intrinsically link physics and metrology, and in doing so improve the accuracy of our primary standards and make them inherently stable in both time and space. But how and who will chose those exact values? I will outline the history and work of the CODATA Task Group on Fundamental Constants, the committee that actually derives those values. I will review the problems that have been faced and how they were overcome and briefly outline the various committees and organizations that have contributed to the process of acceptance and final approval. Finally, I will outline how the measurement transition will be managed and what lies ahead after the redefinition of the SI.
{"title":"SI Redefinition and the Role of the CODATA Task Group on Fundamental Constants","authors":"B. Wood","doi":"10.51843/wsproceedings.2017.27","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.27","url":null,"abstract":"In November 2018 representatives from over 58 countries will meet to approve a major revision to our international measurement system, the SI. This redefinition will be the most sweeping change in the last 140 years and remove the last defining artifact from the SI. In essence there definition of the SI will set the exact values of seven constants, five of which are fundamental constants of physics. This will intrinsically link physics and metrology, and in doing so improve the accuracy of our primary standards and make them inherently stable in both time and space. But how and who will chose those exact values? I will outline the history and work of the CODATA Task Group on Fundamental Constants, the committee that actually derives those values. I will review the problems that have been faced and how they were overcome and briefly outline the various committees and organizations that have contributed to the process of acceptance and final approval. Finally, I will outline how the measurement transition will be managed and what lies ahead after the redefinition of the SI.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127769273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.51843/wsproceedings.2017.14
Steven S. L. Yang
The Standards and Calibration Laboratory (SCL) in Hong Kong has developed a system for the calibration of programmable loads. A programmable load is commonly used to emulate DC or AC loads required to perform functional tests of batteries, photovoltaic cells, power supplies, inverters and transformers. In recent years, programmable loads have more new applications such as electric vehicle testing and regenerative energy system testing. Load regulation test, battery discharge measurement and transient tests can be automated by programmable loads, which load changes for these tests can be made without introducing significant switching transient. Programmable load settings and read back accuracy for constant current mode, constant resistance mode, constant voltage mode, constant power mode and power factor modele loads can also be tested. Details of the proposed AC and DC programmable load calibration system developed at SCL are described in the paper.
{"title":"Calibration of Programmable Loads","authors":"Steven S. L. Yang","doi":"10.51843/wsproceedings.2017.14","DOIUrl":"https://doi.org/10.51843/wsproceedings.2017.14","url":null,"abstract":"The Standards and Calibration Laboratory (SCL) in Hong Kong has developed a system for the calibration of programmable loads. A programmable load is commonly used to emulate DC or AC loads required to perform functional tests of batteries, photovoltaic cells, power supplies, inverters and transformers. In recent years, programmable loads have more new applications such as electric vehicle testing and regenerative energy system testing. Load regulation test, battery discharge measurement and transient tests can be automated by programmable loads, which load changes for these tests can be made without introducing significant switching transient. Programmable load settings and read back accuracy for constant current mode, constant resistance mode, constant voltage mode, constant power mode and power factor modele loads can also be tested. Details of the proposed AC and DC programmable load calibration system developed at SCL are described in the paper.","PeriodicalId":432978,"journal":{"name":"NCSL International Workshop & Symposium Conference Proceedings 2017","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115617292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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