Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Kral meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Degrees of equivalence: offset D_{i} and expanded uncertainty at a 95 % level of confidence
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 1: a flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Degrees of equivalence: offset D_{i} and expanded uncertainty at a 95 % level of confidence
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Degrees of equivalence: offset D_{i} and expanded uncertainty at a 95 % level of confidence
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Kral meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Lab i  D_{i}  U_{i} 
/ %  / %  
CMS/ITRI  0.018  0.044 
NMIJ  0.016  0.032 
NEL  0.025  0.026 
NMiVSL  0.025  0.038 
FORCE  0.020  0.032 
SP  0.007  0.032 
Results are presented under A4 printable format in Summary Results (.PDF file).
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 1: a flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Lab i  D_{i}  U_{i} 
/ %  / %  
CMS/ITRI  0.012  0.047 
NMIJ  0.030  0.052 
NEL  0.040  0.043 
NMiVSL  0.024  0.039 
FORCE  0.022  0.030 
SP  0.003  0.054 
Results are presented under A4 printable format in Summary Results (.PDF file).
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
Results are presented under A4 printable format in Summary Results (.PDF file).
Metrology area, Subfield  Mass and related quantities, Fluid Flow 
Description  Liquid hydrocarbon flow 
Time of measurements  2005  2007 
Status  Approved for equivalence 
Final Reports of the comparisons  
Measurand  Strouhal number (corrected for viscosity) at a constant Reynolds number Re = 10^{+5} 
Parameters  Flow: 5 l/s to 30 l/s 
Transfer device  Turbine and Kral meters, tested in two different configurations (Configuration 1: a flow conditioner is placed upstream of the turbine meter; Configuration 2: the flow conditioner is removed) 
Comparison type  Key Comparison 
Consultative Committee  CCM (Consultative Committee for Mass and Related Quantities) 
Conducted by  CCM (Consultative Committee for Mass and Related Quantities) 
Comments  Results published on 27 November 2008 APMP.M.FFK2.a results are linked to those of CCM.FFK2. Liquid hydrocarbon flow Measurements are taken with two meters, designated as "Kral meter" and "Turbine meter", and in two different configurations (Configuration 1: a flow conditioner is placed upstream of the turbine meter; Configuration 2: the flow conditioner is removed), as explained in Section 2.2 on page 7 of the Final Report.

Pilot institute 
NEL
National Engineering Laboratory, now TUVNEL United Kingdom 
Contact person  R. Paton rpaton@tuvnel.com +44 (0) 1355 272 965 
Pilot laboratory  

NEL 
National Engineering Laboratory, now TUVNEL, United Kingdom, EURAMET 
CMS/ITRI 
Center for Measurement Standards/Industrial Technology Research Institute, Chinese Taipei, APMP 
FORCE 
FORCE Technology, Denmark, EURAMET 
NMIJ AIST 
National Metrology Institute of Japan, Japan, APMP 
NMiVSL 
Nederlands Meetinstituut  Van Swinden Laboratorium (became VSL in 2009), Netherlands, EURAMET 
SP 
Technical Research Institute of Sweden from 2017 Research Institutes of Sweden AB, Sweden, EURAMET 
This page proposes printout on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Kral meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
The key comparison reference value x_{R} is calculated as the weighted mean of the participants' results, as explained in Section 5.4 on page 17 of the CCM.FFK2 Final Report. Its expanded uncertainty is U_{R}. x_{R} = 7.9496, U_{R} = 0.015 % 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in relative terms: D_{i} = (x_{i}  x_{R})/x_{R} and its expanded uncertainty U_{i} = (U_{Lab i}^{2}  U_{R}^{2})^{1/2}. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in relative terms : D_{ij} = (D_{i}  D_{j}) and associated expanded uncertainty U_{ij} = (U_{Lab i}^{2} + U_{Lab j}^{2})^{1/2}. 
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 1: a flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
The key comparison reference value x_{R} is calculated as the weighted mean of the participants' results, as explained in Section 5.4 on page 17 of the CCM.FFK2 Final Report. Its expanded uncertainty is U_{R}. x_{R} = 7.1878, U_{R} = 0.019 % 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in relative terms: D_{i} = (x_{i}  x_{R})/x_{R} and its expanded uncertainty U_{i} = (U_{Lab i}^{2}  U_{R}^{2})^{1/2}. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in relative terms : D_{ij} = (D_{i}  D_{j}) and associated expanded uncertainty U_{ij} = (U_{Lab i}^{2} + U_{Lab j}^{2})^{1/2}. 
Liquid hydrocarbon flow
Strouhal number at a constant Reynolds number Re = 10^{+5}
Turbine meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
The key comparison reference value x_{R} is calculated as the weighted mean of the participants' results, as explained in Section 5.4 on page 17 of the CCM.FFK2 Final Report. Its expanded uncertainty is U_{R}. x_{R} = 7.1715, U_{R} = 0.030 % 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in relative terms: D_{i} = (x_{i}  x_{R})/x_{R} and its expanded uncertainty U_{i} = (U_{Lab i}^{2}  U_{R}^{2})^{1/2}. 
Pairwise degrees of equivalence are not computed for the Turbine meter in Configuration 2. 
Liquid hydrocarbon flow
Kral meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
x_{i} : measurement result reported by laboratory i: Strouhal number at a constant Reynolds number Re = 10^{+5}
U_{Lab i} : expanded uncertainty of x_{i}
Lab i  x_{i}  U_{Lab i }/ %  Date of measurement 
CMS/ITRI 
7.9482 
0.045  March 2006 
NMIJ  7.9484  0.03  April 2006 
NEL  7.9516  0.025  October 2006 
NMiVSL  7.9516  0.04  February 2007 
FORCE  7.9480  0.035  February 2007 
SP 
7.9491 
0.028 
March 2007 
Liquid hydrocarbon flow
Turbine meter
Configuration 1: a flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
x_{i} : measurement result reported by laboratory i: Strouhal number at a constant Reynolds number Re = 10^{+5}
U_{Lab i} : expanded uncertainty of x_{i}
Lab i  x_{i}  U_{Lab i }/ %  Date of measurement 
CMS/ITRI 
7.1870 
0.045  March 2006 
NMIJ  7.1857  0.03  April 2006 
NEL  7.1907  0.025  October 2006 
NMiVSL  7.1895  0.04  February 2007 
FORCE  7.1863  0.035  February 2007 
SP 
7.1880 
0.028 
March 2007 
Liquid hydrocarbon flow
Turbine meter
Configuration 2: no flow conditioner is placed upstream of the turbine meter as explained in Section 2.2 on page 7 of the CCM.FFK2 Final Report
x_{i} : measurement result reported by laboratory i: Strouhal number at a constant Reynolds number Re = 10^{+5}
U_{Lab i} : expanded uncertainty of x_{i}
Lab i  x_{i}  U_{Lab i }/ %  Date of measurement 
CMS/ITRI 
7.1723 
0.045  March 2006 
NMIJ       
NEL  7.1719  0.025  October 2006 
NMiVSL       
FORCE       
SP 
7.1698 
0.028 
March 2007 