Method of Comparison for Calibration of Critical Nozzles

Mingaleev, A. V.; Gorchev, A. I.; Yakovlev, A. B.

doi:10.1007/s11018-019-01585-2

Cited by 2 publications

(3 citation statements)

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“…A turbine fl ow meter and rotary fl ow meter gas counter with high-frequency output were used as the comparators. The volumetric fl ow rate through the calibrated nozzle was determined from the ratio of the frequencies of the pulses of the output signal of the comparator with alternating transit of gas through a calibrated nozzle and a standard nozzle possessing nearly the same fl ow rate characteristics [3].…”

Section: Introductionmentioning

confidence: 99%

“…A new method of comparison for calibration of critical nozzles by means of standard critical nozzles was developed, patented, and employed in GET 118-2013. Flow laminarizators that describe the linear dependence of the volumetric fl ow rate on the pressure drop in the channel and that are also sensitive to any variation in the gas fl ow rate, possess a simple design, stable metrological characteristics, and good reproducibility of the results of measurement were used as the comparators [3].…”

Section: Introductionmentioning

confidence: 99%

“…On the second and third stages, pressure drops Δp 1 and Δp 2 in the comparator as the gas travels through the fi rst and second standard critical nozzles with known fl ow rates Q V1 and Q V2 relative to standard conditions are established. The volumetric gas fl ow rate through the calibrated nozzle is determined from the equation [3]…”

Section: Introductionmentioning

confidence: 99%

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Get 118-2017: State Primary Standard of the Units of Volumetric and Mass Flow Rates of Gas. History of Creation and Confirmation of Calibration, and Measurement Capabilities

2021

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The history of the creation of GET 118-2017, the State Primary Standard of the Units of Volumetric and Mass Flow Rate, is presented. The signifi cant role of the international comparisons that were performed on different stages of the creation of GET 118-2017 is noted; results of comparisons were confi rmed, which made it possible to incorporate into the KCDB database the calibration and measurement capabilities of the Russian Federation in the area of measurements of the volumetric fl ow rate of gas and also helped to determine the directions and measures designed to improve the standard. A patented method of comparison for calibration of critical nozzles implemented in GET 118-2017 for transmission to working standards of units of the volumetric and mass fl ow rate of gas is described. The designs, structure, and characteristics of GET 118-2017 are presented. More than 700 working standards of units of the volumetric and mass fl ow rates of gas used in the Russian Federation and certain member countries of COOMET are now traced to GET 118-2017, with the total number of applications to GET 118-2017 for transmission of the unit of a quantity exceeding 3500 annually.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Get 118-2017: State Primary Standard of the Units of Volumetric and Mass Flow Rates of Gas. History of Creation and Confirmation of Calibration, and Measurement Capabilities

2021

Self Cite

View full text Add to dashboard Cite

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

2021

View full text Add to dashboard Cite

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.

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Method of Comparison for Calibration of Critical Nozzles

Cited by 2 publications

References 1 publication

Get 118-2017: State Primary Standard of the Units of Volumetric and Mass Flow Rates of Gas. History of Creation and Confirmation of Calibration, and Measurement Capabilities

Get 118-2017: State Primary Standard of the Units of Volumetric and Mass Flow Rates of Gas. History of Creation and Confirmation of Calibration, and Measurement Capabilities

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

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