Gravimetric flow standard in the vacuum and hermetic modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F18%3AN0000076" target="_blank" >RIV/00177016:_____/18:N0000076 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/18:10386623

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6501/aad1e2/meta" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6501/aad1e2/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6501/aad1e2" target="_blank" >10.1088/1361-6501/aad1e2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gravimetric flow standard in the vacuum and hermetic modes

Popis výsledku v původním jazyce

The Czech national standard of low gas flow is based on dynamic gravimetry principle, defining the flow rate as the mass loss of gas from a pressure bottle which is continuously weighed. This weighing is performed in an ambient atmosphere which brings two problems. First, the buoyancy corrections are the main and unavoidable source of uncertainty. Second, there can occur a condensation of the water vapour on the pressure bottle due to its cooling below dew point for the higher flow rates. A weighing in a hermetically closed atmosphere suppresses the problematic buoyancy effects. A weighing in vacuum does the same and also eliminates any danger of water condensation. The paper describes the hermetic and vacuum mode modifications together with the relevant uncertainty analyses.

Název v anglickém jazyce

Gravimetric flow standard in the vacuum and hermetic modes

Popis výsledku anglicky

The Czech national standard of low gas flow is based on dynamic gravimetry principle, defining the flow rate as the mass loss of gas from a pressure bottle which is continuously weighed. This weighing is performed in an ambient atmosphere which brings two problems. First, the buoyancy corrections are the main and unavoidable source of uncertainty. Second, there can occur a condensation of the water vapour on the pressure bottle due to its cooling below dew point for the higher flow rates. A weighing in a hermetically closed atmosphere suppresses the problematic buoyancy effects. A weighing in vacuum does the same and also eliminates any danger of water condensation. The paper describes the hermetic and vacuum mode modifications together with the relevant uncertainty analyses.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Measurement Science and Technology

ISSN

09570233

e-ISSN

13616501

Svazek periodika

29

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000441305300002

EID výsledku v databázi Scopus

2-s2.0-85051741600