National standards of the impulse electrical voltage of Russian Federation and Republic of Belarus: additional comparisons

2021 ◽  
pp. 38-40
Author(s):  
Oleg V. Kaminsky ◽  
Andrey V. Kleopin ◽  
Vladislav V. Makarov ◽  
Leonid N. Selin
Keyword(s):  
Pulse Generator ◽  
Primary Standard ◽  
Critical Value ◽  
National Standards ◽  
Laboratory Measurements ◽  
Bilateral Comparison ◽  
Calibration And Measurement Capabilities ◽  
Electrical Voltage ◽  
Measurement Results ◽  
Measurement Capabilities

The results of additional bilateral comparison of initial standards of the impulse electrical voltage unit were considered. As a result of comparison there were confirmed announced uncertainties and calibration and measurement capabilities of the participants of comparison. The comparison was carried out under guidance of COOMET (project 710/RU-a/16) оn the initiative of national metrology institutes (NMI): VNIIFTRI (Russia) and BelGIM (Republic of Belarus). The comparison involved national standards: the State primary standard unit of the impulse electrical voltage unit (GET 182-2010, VNIIFTRI) and the original standard of the impulse electrical voltage unit BelGIM. Step pulse generator TMG030010SN11-M1 was used as a traveling standard. The values of the impulse electrical voltage, reproduced by means of traveling standard, were measured by national standards.The purpose of comparison was to confirm confidence in the measurement results and calibration certificates, issued by the NMI in the field of impulse electrical voltage measurements. In the comparison VNIIFTRI acted as a pilot laboratory. Measurements of impulse electrical voltage by means of traveling standard were carried out in the following order: first – measurements of impulse electrical voltage on GET 182-2010, then – on the original standard of BelGIM and finally – again on GET 182-2010. Processing of the results of comparison according to χ2(i) criterion showed that χ2(i) criterion values (calculated on the basis of the measurement results) doesn’t exceed a critical value χ2, that is the objective confirmation of announced uncertainties, declared by the participants of comparison.

scholarly journals Establishment of torque realisation up to 5 kN·m with a new design of the torque standard machine

ACTA IMEKO ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 30
Author(s):  
Nittaya Arksonnarong ◽  
Nattapon Saenkhum ◽  
Pramann Chantaraksa ◽  
Tassanai Sanponpute
Keyword(s):  
Measurement Range ◽  
Uncertainty Evaluation ◽  
Torque Measurement ◽  
Calibration And Measurement Capabilities ◽  
Measurement Results ◽  
Bearing Structure ◽  
Measurement Capabilities

<p class="Abstract">A Torque Standard Machine (TSM) with a rated capacity of 5 kN·m was designed and constructed by the Torque Laboratory, National Institute of Metrology (Thailand), NIMT. The machine had initially used a flexure bearing as a fulcrum. It had been developed based on the research of a 10 N·m suspended fulcrum TSM. However, the bearing structure was changed to a combination of eight elastic hinges in order to withstand larger cross-forces for providing greater strength and providing a shorter stabilising time, consuming the lever arm’s swing. With a three-column weightlifting system, the machine provides five measuring ranges ranging from 100 N·m to 5,000 N·m in the same set of stacked weights.</p><p class="Abstract">The measurement results showed the sensitivity of the fulcrum within ± 0.005 N·m from 10 % to 100 % of the measurement range. The sensitivity of the fulcrum is one of the main sources of the uncertainty evaluation of the torque measurement. The Calibration and Measurement Capabilities (CMCs) of the torque measurement were 0.01 % (<em>k=2</em>) in the measurement range from 500 N·m to 5,000 N·m. To confirm the capability of the measurement, an informal comparison with Physikalisch-Technische Bundesanstalt (PTB) was conducted. The results were satisfactory, with the |<em>E</em><sub>n</sub>| less than 1.</p>

State primary standard of gas volumetric and mass flow rate units GET 118-2017: history of creation, confirmation of calibration and measurement capabilities

2021 ◽  
pp. 22-26
Author(s):  
Aleksandr I. Gorchev ◽  
Aidar V. Mingaleev ◽  
Anatoly B. Yakovlev
Keyword(s):  
Mass Flow ◽  
Flow Rate ◽  
Primary Standard ◽  
Flow Rates ◽  
Calibration And Measurement Capabilities ◽  
History Of ◽  
Mass Flow Rates ◽  
The Russian Federation ◽  
Working Standards ◽  
Measurement Capabilities

The history of the creation of the State primary standard of gas volumetric and mass flow rate units GET 118-2017 is presented. The significant role of international comparisons was noted at various stages of the creation of GET 118-2017: the comparisons results confirmed and made it possible to include in the KCDB the calibration and measurement capabilities of the Russian Federation in the field of gas volumetric flow measurements, and also helped to determine the direction and list of measures to improve the standard. A patented comparison method for calibrating critical nozzles, implemented in GET 118-2017 for transfer the units of volumetric and mass flow rates of gas to working standards, is described. The design, composition and characteristics of GET 118-2017 are presented. Currently, more than 700 working standards of gas volumetric and mass flow rates used in the Russian Federation and some KOOMET member countries are traced to GET 118-2017, the total number of calls to GET 118-2017 for the transfer of measurement units exceeds 3500 per year.

PTB for Climate Sciences: Combined efforts supporting the European Metrology Network for Climate and Ocean Observation

2020 ◽  
Author(s):  
Olav Werhahn ◽  
Christian Monte ◽  
Steffen Seitz
Keyword(s):  
Infrared Radiation ◽  
Working Group ◽  
Radiation Thermometry ◽  
Measurement Techniques ◽  
Gas Analysis ◽  
National Metrology Institute ◽  
Climate Research ◽  
Calibration And Measurement Capabilities ◽  
Working Groups ◽  
Measurement Capabilities

&lt;p&gt;&lt;span&gt;The German national metrology institute Physikalisch-Technische Bundesanstalt (PTB) is organized in typical different sections and divisions, each of them bringing in their own portfolio on specific calibration and measurement capabilities. Customer are being served on various fields of work and metrological SI-traceability strategies are developed for all the units of measurements. However, despite many third-party projects driven by individual PTB groups [1], as for example within the European Metrology Programme for Innovation and Research (EMPIR, [2]) and its different Environmental calls, PTB has never been seen itself as a climate research institute. With the foundation of the European Metrology Network for Climate and Ocean Observation (EMN) [3], PTB has now brought its various expertise on metrology for climate research to a new level of combination.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;The presentation highlights the input from three different working groups of PTB to the EMN related to its sections &amp;#8220;Atmosphere&amp;#8221;, &amp;#8220;Ocean&amp;#8221;, and &amp;#8220;Land&amp;#8221; as being addressed by the groups for Spectrometric Gas Analysis [4], Electrochemistry [5], and Infrared Radiation Thermometry [6], respectively. With those expertise PTB seeks to support the idea of the EMN bringing in measurement techniques like in situ laser spectroscopy-based species quantification, FTIR-based analysis of atmospheric gases and related spectral line parameters of key greenhouse gases and offering its consulting services to the EMN in the &amp;#8220;Atmosphere&amp;#8221; section. On the &amp;#8220;Ocean&amp;#8221; section of the EMN PTB offers its expertise based on ph-measurements, salinity definitions and respective calibration and measurement capabilities, whereas the &amp;#8220;Land&amp;#8221; section of the EMN is benefitting from PTB&amp;#8217;s application-specific traceability concepts for infrared radiation thermometry and infrared radiometry and for quantitative thermography and for emissivity measurements in the field of satellite-, aircraft- and ground-based optical remote sensing of the atmosphere and Earth (-90 &amp;#176;C to 100 &amp;#176;C).&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Examples for all three working groups will be presented and discussed in view of there benefit to the EMN. Collaboration with European partners will be shown.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Acknowledgements:&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Parts of the work &lt;/span&gt;has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. PTB acknowledges the collaboration with all partners in the EMN for Climate and Ocean Observation.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;span&gt;References:&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[1] EMPIR 16ENV05 MetNO2 (http://empir.npl.co.uk/metno2/), EMPIR 16ENV06 SIRS (https://www.vtt.fi/sites/SIRS/), EMPIR 16ENV08 (http://empir.npl.co.uk/impress/&lt;/span&gt;&lt;span&gt;)&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[2] European Metrology Programme for Innovation and Research, https://www.euramet.org/research-innovation/research-empir/?L=0&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[3] European Metrology Network for Climate and Ocean Observation, https://www.euramet.org/european-metrology-networks/climate-and-ocean-observation/?L=0&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[4] PTB working group Spectrometric Gas Analysis, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-34/ag-342.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[5] PTB working group Electrochemistry, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-31/ag-313.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[6] PTB working group Infrared Radiation Thermometry https://www.ptb.de/cms/en/ptb/fachabteilungen/abt7/fb-73/ag-732.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

Re-Evaluation of Calibration and Measurement Capabilities of Pitch Calibration Systems Designed by Using the Diffraction Method

2017 ◽  
Vol 11 (5) ◽  
pp. 691-698
Author(s):  
Ichiko Misumi ◽  
Jun-ichiro Kitta ◽  
Ryosuke Kizu ◽  
Akiko Hirai ◽  
◽  
...  
Keyword(s):  
Semiconductor Industry ◽  
Diffraction Method ◽  
Reference Value ◽  
Critical Dimension ◽  
National Metrology Institute ◽  
Calibration Laboratory ◽  
Long Term Stability ◽  
Calibration And Measurement Capabilities ◽  
Electron Microscopes ◽  
Measurement Capabilities

One-dimensional grating is one of the most important standards that are used to calibrate magnification of critical-dimension scanning electron microscopes (CD-SEMs) in the semiconductor industry. Long-term stability of pitch calibration systems is required for the competence of testing and calibration laboratories determined in ISO/IEC 17025:2005. In this study, calibration and measurement capabilities of two types of pitch calibration systems owned by a calibration laboratory are re-evaluated through comparison to a reference value and its expanded uncertainty given by a metrological atomic force microscope (metrological AFM) at National Metrology Institute of Japan (NMIJ), AIST. The calibration laboratory’s pitch calibration systems are designed by using the diffraction method (optical and X-ray).

scholarly journals Metrological framework to support accurate, reliable, and reproducible nucleic acid measurements

2021 ◽  
Author(s):  
Mojca Milavec ◽  
Megan H. Cleveland ◽  
Young-Kyung Bae ◽  
Robert I. Wielgosz ◽  
Maxim Vonsky ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Metrology In Chemistry ◽  
Amount Of Substance ◽  
Dna And Rna ◽  
Measurement Results ◽  
Metrological Infrastructure ◽  
Nucleic Acid Analysis ◽  
Primary Focus ◽  
Analysis Working Group ◽  
Measurement Capabilities

Abstract Nucleic acid analysis is used in many areas of life sciences such as medicine, food safety, and environmental monitoring. Accurate, reliable measurements of nucleic acids are crucial for maximum impact, yet users are often unaware of the global metrological infrastructure that exists to support these measurements. In this work, we describe international efforts to improve nucleic acid analysis, with a focus on the Nucleic Acid Analysis Working Group (NAWG) of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM). The NAWG is an international group dedicated to improving the global comparability of nucleic acid measurements; its primary focus is to support the development and maintenance of measurement capabilities and the dissemination of measurement services from its members: the National Metrology Institutes (NMIs) and Designated Institutes (DIs). These NMIs and DIs provide DNA and RNA measurement services developed in response to the needs of their stakeholders. The NAWG members have conducted cutting edge work over the last 20 years, demonstrating the ability to support the reliability, comparability, and traceability of nucleic acid measurement results in a variety of sectors.

scholarly journals Optical power scale realization using the predictable quantum efficient detector

2022 ◽  
Vol 2149 (1) ◽  
pp. 012006
Author(s):  
Kinza Maham ◽  
Petri Kärhä ◽  
Farshid Manoocheri ◽  
Erkki Ikonen
Keyword(s):  
Laser Power ◽  
Primary Standard ◽  
Optical Power ◽  
Spectral Responsivity ◽  
Expanded Uncertainty ◽  
Working Standard ◽  
Cryogenic Radiometer ◽  
Trap Detector ◽  
Measurement Results ◽  
Power Scale

Abstract We report realization of scales for optical power of lasers and spectral responsivity of laser power detectors based on a predictable quantum efficient detector (PQED) over the spectral range of 400 nm–800 nm. The PQED is characterized and used to measure optical power of a laser that is further used in calibration of the responsivities of a working standard trap detector at four distinct laser lines, with an expanded uncertainty of about 0.05%. We present a comparison of responsivities calibrated against the PQED at Aalto and the cryogenic radiometer at RISE, Sweden. The measurement results support the concept that the PQED can be used as a primary standard of optical power.

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