scholarly journals Metrological Assurance of Gas Calorimeter and Wobbe Index Analyser

2021 ◽  
Vol 17 (2) ◽  
pp. 19-32
Author(s):  
K. A. Mishina Mishina ◽  
E. N. Korchagina ◽  
Ia. V. Kazartsev
Keyword(s):  
Reference Materials ◽  
Primary Standard ◽  
Calorific Value ◽  
Metrological Assurance ◽  
State Primary Standard ◽  
Measuring Instruments ◽  
Target Uncertainty ◽  
Combustion Energy ◽  
Certified Value ◽  
Wobbe Index

The paper describes research on metrological assurance of such measuring instruments as gas calorimeters and Wobbe index analysers. The purpose of the performed research is development of reference materials for gases with certified value of net volume-basis calorific value traceable to Russian state primary standard. Input set of candidate gases is hydrogen, methane, ethane and propane, as well as the target uncertainty of lower volumetric combustion energy value equal to 0,3 % – both were selected basing on results of metrological characteristics analysis of calorimetric equipment. The certified value of lower volumetric combustion energy is traceable to the State Primary Standard of combustion energy, specific combustion energy and volumetric combustion energy units GET 16. The certified value of selected gases and the uncertainty of this value were estimated with usage of comparing calorimeters for the combustion of high- and low-calorie gases «USVG» and «USNG» included in GET 16. Results obtained during investigational study and reference materials characterisation confirmed the stated accuracy. The continuance in prospect may allow development of reference materials for gas imitating mixtures of natural and casing-head gases as well as include Wobbe index in the list of certified characteristics.

scholarly journals Development of food industry metrological assurance complex

2021 ◽  
Vol 17 (1) ◽  
pp. 21-33
Author(s):  
A. S. Sergeeva ◽  
N. L. Vostrikova ◽  
M. Yu. Medvedevskikh
Keyword(s):  
Reference Materials ◽  
Mass Fraction ◽  
Food Industry ◽  
Nutritional Supplement ◽  
Metrological Assurance ◽  
Reference Measurement ◽  
Primary Reference ◽  
Certified Value ◽  
Egg Powder ◽  
Food Staples

The paper considers the contribution of experts from the Laboratory of Metrology of Moisture Measurement and Reference Materials to the improvement of the food industry metrological assurance system. The information on the results of the development of forty types of reference materials (RM) for the composition of various nutrition, food staples and nutritional supplement in the period 2008-2020 is generalized. The development of each new RM type included preparation of the material, research for its stability and homogeneity, and determination of certified value with the appliance of State primary (GET 173) and secondary (GVET 176-1) standards, as well as primary reference measurement procedures and conducting the interlaboratory experiment for checking the applicability of the RM. The creation in 2008 of GET 173 was accompanied by the development of RMs for the composition of grains and dry milk product. The approval in 2010 of GVET 176-1 allowed to add in the RM the certified value for the mass fraction of nitrogen (protein). As a result of successful participation in comparisons, UNIIM got 6 items of calibration and measurement capabilities on measurements of mass fraction of nitrogen in glycine, milk powder, grain, egg powder, cereal and feed-stuff in the BIPM database. 35 types of RM for the composition of dairy and meat products, egg powder, infant food, oil and starch products together with the development of primary reference measurement procedures for measurement of fat, crude fat, ash and carbohydrates mass fraction were created between 2016 and 2019. Moreover, the RM for the composition of nutritional supplement (glycine, melamine, cystine) and dairy products for metrological assurance of IR-analysers as well as RM for the composition of reconstituted milk were developed for the control of measurement results by the enzyme-linked immunosorbent assay (ELISA). Developed RM were systemized on fields of the appliance of Technical regulations of Customs Union and the sectors of the international food triangle model. These RMs allow providing the measurement uniformity of the identification indicators and the nutritional value of food products and food staples.

scholarly journals Research of the State Primary Standard of the unit of scaling factor of AC voltage up to 750/√3 kV

2021 ◽  
pp. 9-14
Author(s):  
Yurii Anokhin ◽  
Oleh Velychko
Keyword(s):  
High Voltage ◽  
Primary Standard ◽  
National Level ◽  
Practical Importance ◽  
Scaling Factor ◽  
The State ◽  
State Primary Standard ◽  
Measuring Instruments ◽  
Measurement Standards ◽  
Uncertainty Of Measurements

All electrical energy is produced, transmitted and distributed at high voltages. In this case, the measurement of the amount of electricity is carried out by electricity meters together with voltage transformers (VTs). The largest capacities are transmitted and distributed on power transmission lines of voltage of class 750 kV. In Ukraine there are about two hundred measuring VTs of class 750 kV. In addition, power facilities have been actively built recently, which will also require the installation of 750 kV transformers. Working VTs of substations for a class of 750 kV may have great weight and dimensions. Their height is 7 m and weight is 4000 kg. Working measurement standards have the same weight and dimensions. Therefore, obtaining the size of a physical quantity from the measurement standards of other countries is very difficult for two reasons: it is very difficult to transport such working measurement standards abroad; only a few countries have measuring instruments with a voltage of 750 kV. The purpose of the article is to highlight the results of researches of the State Primary Standard of the unit of scaling factor of alternating current (AC) voltage up to 750/√3 kV, in particular: formation of the composition of a set of measuring instruments for the reproduction of the unit of scaling factor; establishing a method for reproducing the unit of scaling factor; estimation of uncertainty of measurements and other metrological characteristics while transferring the unit of scaling factor. The article presents the results of the research of the newly established State Primary Standard of the unit of scaling factor of AC voltage up to 750/√3 kV, which are of great practical importance. Those researches are aimed at improving the metrological traceability of AC high-voltage at the national level. Keywords: AC high-voltage; measurement standard; measurement; calibration; uncertainty of measurement.

State primary standard of optical density unit GET 206-2016

2021 ◽  
pp. 3-7
Author(s):  
Dmitriy N. Zyablikov ◽  
Aleksandr V. Ivanov ◽  
Artem V. Koldashov ◽  
Sergey N. Marchenko
Keyword(s):  
Optical Density ◽  
Primary Standard ◽  
Spectral Characteristics ◽  
Optical Transmittance ◽  
Luminous Flux ◽  
State Primary Standard ◽  
Measuring Instruments ◽  
Density Unit ◽  
Reflected Light ◽  
Non Destructive

The description of the State Primary Standard of optical density unit GET 206-2016 is given. The principle of operation of the standard, based on filtering the luminous flux of transmitted and reflected light, is described. The composition of the standard and its metrological characteristics are presented. Data on the study of the geometric and spectral characteristics of the standard are presented. Currently, GET 206-2016 allows solving the problems of metrological support of optical transmittance density measuring instruments (radiographic non-destructive quality control of materials in various industries) and optical reflection density measuring instruments (printing, applications of energy-saving and graphic technologies).

Research on expanding the range of reproduction of magnetic flux density of the DC field of the state primary standard GET12-2011

2020 ◽  
pp. 3-7
Author(s):  
Vladlen Ya. Shifrin ◽  
Denis I. Belyakov ◽  
Alexander E. Shilov ◽  
Denis D. Kosenko
Keyword(s):  
Magnetic Flux ◽  
Magnetic Induction ◽  
Frequency Conversion ◽  
Magnetic Measurements ◽  
Primary Standard ◽  
Uncertainty Budget ◽  
The State ◽  
State Primary Standard ◽  
Magnetic Flux Density ◽  
Constant Field

The results of works aimed at increasing the level of uniformity of measurements of the magnetic induction of a constant field – the basic value in the field of magnetic measurements. A set of equipment for reproducing a unit of magnetic induction of a constant field in the range of 1–25 mT was created and described. The inclusion of this complex in the State primary standard of units of magnetic induction, magnetic flux, magnetic moment and magnetic induction gradient GET 12-2011 will ensure the reproduction and direct transmission of the unit of permanent magnetic induction in the ranges of not only weak (10–3–1 mT), but medium (1–25 mT) and strong (0.025–1 T) magnetic fields. A quantum cesium magnetometer based on the resolved structure of cesium atoms was created to transmit the unit of magnetic induction to the region of medium fields. The procedure for calculating the frequency conversion coefficients to magnetic induction of the created quantum cesium magnetometer is described. The uncertainty budget for reproducing a unit of magnetic induction of a constant field using the created complex is estimated.

The state primary standard for the unit of mean laser power

2007 ◽  
Vol 50 (7) ◽  
pp. 695-699 ◽  
Author(s):  
V. S. Ivanov ◽  
A. F. Kotyuk ◽  
A. A. Liberman ◽  
S. A. Moskalyuk ◽  
M. V. Ulanovskii
Keyword(s):  
Laser Power ◽  
Primary Standard ◽  
The State ◽  
State Primary Standard

The state primary standard of the unit of heat-flux surface density

2009 ◽  
Vol 52 (10) ◽  
pp. 1101-1106
Author(s):  
O. M. Lozinskaya ◽  
N. I. Rybak ◽  
V. Ya. Cherepanov ◽  
E. M. Sheinin ◽  
V. A. Yamshanov
Keyword(s):  
Heat Flux ◽  
Surface Density ◽  
Primary Standard ◽  
The State ◽  
State Primary Standard ◽  
Flux Surface

Get 172–2016, State Primary Standard of Unit of Surface Density of Thermal Flux

2018 ◽  
Vol 61 (3) ◽  
pp. 193-198
Author(s):  
N. I. Rybak ◽  
V. Ya. Cherepanov ◽  
E. M. Sheinin ◽  
V. A. Yamshanov
Keyword(s):  
Surface Density ◽  
Thermal Flux ◽  
Primary Standard ◽  
State Primary Standard

scholarly journals The problem of improving the quality of seriously issued certified reference materials of the composition of gas mixtures

2019 ◽  
Vol 15 (3) ◽  
pp. 5-13
Author(s):  
L. A. Konopelko ◽  
A. V. Kolobova ◽  
O. V. Fatina
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Materials ◽  
Metrological Traceability ◽  
Gas Mixtures ◽  
Measuring Instruments ◽  
Expanded Uncertainty ◽  
Iso Guide 35 ◽  
The Russian Federation

Currently, in the Russian Federation, the metrological traceability of certified reference materials of the composition of gas mixtures in cylinders under pressure produced by manufacturers of certified reference materials is carried out in accordance with GOST 8.578-2014. Considering that certified reference materials of the composition of gas mixtures in cylinders under pressure are used for testing to approye the type of measuring instruments, verification, calibration, and graduation of gas-analytical measuring instruments used to control explosive gases and vapors, harmful components in the atmospheric air and the air of the working area, emissions from vehicles and enterprises, to control technological processes, the quality of hydrocarbon products, etc., the issue of ensuring the quality of seriously produced certified reference materials (about 100.000 cylinders with gas mixtures per year) is important. To ensure the quality of certified reference materials of gas mixtures in cylinders under pressure, mass-produced by manufacturers of certified reference materials, we offer the following actions:– manufacturers of certified reference materials’ passing of mandatory accreditation for compliance with the requirements of GOST ISO Guide 34–2014 and GOST ISO Guide 35–2015;– manufacturers of certified reference materials’ constant participation in the proficiency testing programs through interlaboratory tests;– actualizing and refining the existing set of standards defining the requirements for the entire life cycle of a certified reference material of a gas mixture in a cylinder under pressure;– improving the method of certification of a reference material by calculating the value of the expanded uncertainty of the reference material and the introducting a new coefficient «technological reserve».

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