Statistical reassessment of calibration and measurement capabilities based on key comparison results

Metrologia ◽  
2019 ◽  
Vol 56 (4) ◽  
pp. 045001
Author(s):  
Katsuhiro Shirono ◽  
Maurice Cox
Keyword(s):  
Key Comparison ◽  
Calibration And Measurement Capabilities ◽  
Comparison Results ◽  
Measurement Capabilities

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

<p><span>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.</span></p><p><span>The presentation highlights the input from three different working groups of PTB to the EMN related to its sections “Atmosphere”, “Ocean”, and “Land” 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 “Atmosphere” section. On the “Ocean” section of the EMN PTB offers its expertise based on ph-measurements, salinity definitions and respective calibration and measurement capabilities, whereas the “Land” section of the EMN is benefitting from PTB’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 °C to 100 °C).</span></p><p><span>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.</span></p><p><span>Acknowledgements:</span></p><p><span>Parts of the work </span>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.</p><p> </p><p><span>References:</span></p><p><span>[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/</span><span>)</span></p><p><span>[2] European Metrology Programme for Innovation and Research, https://www.euramet.org/research-innovation/research-empir/?L=0</span></p><p><span>[3] European Metrology Network for Climate and Ocean Observation, https://www.euramet.org/european-metrology-networks/climate-and-ocean-observation/?L=0</span></p><p><span>[4] PTB working group Spectrometric Gas Analysis, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-34/ag-342.html</span></p><p><span>[5] PTB working group Electrochemistry, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-31/ag-313.html</span></p><p><span>[6] PTB working group Infrared Radiation Thermometry https://www.ptb.de/cms/en/ptb/fachabteilungen/abt7/fb-73/ag-732.html</span></p><p> </p>

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 RFCAG2013: Russian-Finnish comparison of absolute gravimeters in 2013

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
J. Mäkinen ◽  
R.A. Sermyagin ◽  
I.A. Oshchepkov ◽  
A.V. Basmanov ◽  
A.V. Pozdnyakov ◽  
...  
Keyword(s):  
International Association ◽  
Key Comparisons ◽  
Consultative Committee ◽  
Key Comparison ◽  
Practical Applications ◽  
Comparison Results ◽  
Uncertainty Structure ◽  
Different Types ◽  
June July ◽  
Different Characteristics

AbstractIn June–July 2013,we performed a comparison of five absolute gravimeters of different types. The gravimeters were the FG5X-221 of the FGI, the FG5-110 and GBL-M 002 of the TsNIIGaiK, the GABL-PM of the IAE SB RAS, and the GABL-M of the NIIMorGeofizika (Murmansk, Russia). The three last-mentioned are field-type portable gravimeters made by the Institute of Automation and Electrometry in Novosibirsk, and this is the first international comparison for them. This Russian-Finnish Comparison of Absolute Gravimeters RFCAG2013 was conducted at four sites with different characteristics: at the field sites Pulkovo and Svetloe near St. Petersburg, and at the laboratory sites TsNIIGaIK in Moscow and Zvenigorod near Moscow. At the TsNIIGAiK site and at Zvenigorod two piers were used, such that altogether six stations were occupied. The FG5X- 221 provides the link to the CCM.G-K2 Key Comparison in Luxembourg in November 2013. Recently, the Consultative Committee for Mass and Related Quantities and the International Association of Geodesy drafted a strategy on how to best transmit the results of Key Comparisons of absolute gravimeters to benefit the geodetic and geophysical gravimetric community. Our treatment of the RFCAG2013 presents one of the first practical applications of the ideas of the strategy document, andwe discuss the resulting uncertainty structure. Regarding the comparison results, we find the gravimeters show consistent offsets at the quite different sites. All except one gravimeter are in equivalence.

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>

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.

The Challenge of Developing Primary Standards Mixtures of Carbon Dioxide at Atmospheric Levels to Establish Traceability to GHG Monitoring Analysis

2017 ◽  
Vol 6 (2) ◽  
pp. 1-15 ◽  
Author(s):  
Andreia de Lima Fioravante ◽  
Cristiane Rodrigues Augusto ◽  
Valnei Smarçaro da Cunha ◽  
Luiz Antonio d'Avila
Keyword(s):  
Carbon Dioxide ◽  
International Standards ◽  
Expanded Uncertainty ◽  
High Confidence ◽  
Standard Mixture ◽  
Cavity Ringdown ◽  
Calibration And Measurement Capabilities ◽  
Primary Standards ◽  
High Confidence Level ◽  
Measurement Capabilities

This article describes how in recent years the need for the quality control, reliability and traceability of analytical results has been strongly emphasised. The National Institute of Metrology, Quality and Technology, is involved in improving calibration and measurement capabilities to provide high confidence level in accordance with the latest regulation regarding greenhouse gases standards. This article describes the gravimetric production of certified gaseous reference materials of carbon dioxide in atmospheric synthetic air that are used to monitor its concentration in the atmosphere. Considering the contributions from gravimetry preparation and its verification analysis by cavity ringdown system (CRDS) the relative expanded uncertainty of the standard mixture of carbon dioxide was lower than 0.5% for the range studied from 370 to 550 μmol/mol, which is comparable to the average of 0,25% relative uncertainties presented on international standards mixtures.

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