Results published on 23 March 2012
EUROMET.M.FK2, CCM.FK2.a.1, APMP.M.FK2.a and APMP.M.FK2.b results are linked to those of CCM.FK2.a and CCM.FK2.b
Click on one of the following links to access results:
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 100 kN
Degrees of equivalence D_{i} and expanded uncertainty U_{i} (k = 2) expressed in 10^{5}
Red diamonds: CCM.FK2
Orange squares: CCM.FK2.a.1
Blue circles: EUROMET.M.FK2
Green squares: APMP.M.FK2
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 50 kN
Degrees of equivalence relative to the CCM.FK2 reference value:
Red: CCM.FK2
Orange: CCM.FK2.a.1
Blue: EUROMET.M.FK2
Green: APMP.M.FK2
Results are presented under A4 printable format in Summary Results (PDF file).
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 100 kN
Degrees of equivalence relative to the CCM.FK2 reference value:
Red: CCM.FK2
Orange: CCM.FK2.a.1
Blue: EUROMET.M.FK2
Green: APMP.M.FK2
Results are presented under A4 printable format in Summary Results (PDF file).
Metrology area, Subfield  Mass and related quantities, Force 
Description  Force measurements 
Time of measurements  2007  2009 
Status  Approved for equivalence 
Final Reports of the comparisons  
Measurand  Force: 50 kN to 100 kN 
Transfer device  Force transducer 
Comparison type  Key Comparison 
Consultative Committee  CCM (Consultative Committee for Mass and Related Quantities) 
Conducted by  EURAMET (European Association of National Metrology Institutes) 
RMO Internal Identifier  EUROMET Project No 518 
Comments  Results published on 18 December 2015 EUROMET.M.FK2, CCM.FK2.a.1, APMP.M.FK2.a and APMP.M.FK2.b results are linked to those of CCM.FK2.a and CCM.FK2.b

Pilot institute 
NPL
National Physical Laboratory United Kingdom 
Contact person  A. Knott +44 (0) 20 8943 6180 
Pilot laboratory  

NPL 
National Physical Laboratory, United Kingdom, EURAMET 
CMI 
Czech Metrology Institute, Czechia, EURAMET 
EIM 
Hellenic Institute of Metrology, Greece, EURAMET 
FORCE 
FORCE Technology, Denmark, EURAMET 
GUM 
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET 
INM 
National Institute of Metrology, Romania, EURAMET 
INMETRO 
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM 
IPQ 
Instituto Portugues da Qualidade, Portugal, EURAMET 
METAS 
Federal Institute of Metrology, Switzerland, EURAMET 
MKEH 
Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET 
PTB 
PhysikalischTechnische Bundesanstalt, Germany, EURAMET 
VSL 
VSL, Netherlands, 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" :
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 50 kN
The key comparison reference value, x_{R}, is calculated as the weighted average of the mean relative deviations from the pilot laboratory obtained by the participating laboratories. Its standard uncertainty, u_{R}, is calculated as explained on page 30 of the Final Report). 
The degree of equivalence of each laboratory with respect to the key comparison reference reference value is given by a pair of terms, both expressed in 10^{5}: D_{i} and U_{i}, its expanded uncertainty (k = 2). (See the Appendix on page 32 of the Final Report). 
Linking is made via the pilot laboratory NPL, who also participated in the CCM.FK2.a comparison.
For each nominal value of the force, a reference value is computed inside the EURAMET key comparison, as the weighted mean deviation from the pilot value.
Based on the assumption that the performance of the common participants in both comparisons, the NPL and the PTB, has remained unchanged, it can be concuded that the EURAMET reference values are 0.6 10^{5} and 0.7 10^{5} lower than the CCM.FK2 key comparison reference values, at forces of 50 kN and 100 kN, respectively.
The degrees of equivalence found inside the EURAMET key comparison (offsets and expanded uncertainties) are adjusted accordingly, as explained on page 28 of the EUROMET.M.FK2 Final Report, to be transferred to key comparison CCM.FK2.
Linking of results for 50 kN is made via KRISS, NIM and NMIJ/AIST who also participated in the CCM.FK2.a and CCM.FK2.b comparisons.
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 100 kN
The key comparison reference value, x_{R}, is calculated as the weighted average of the mean relative deviations from the pilot laboratory obtained by the participating laboratories. Its standard uncertainty, u_{R}, is calculated as explained on page 30 of the Final Report). 
The degree of equivalence of each laboratory with respect to the key comparison reference reference value is given by a pair of terms, both expressed in 10^{5}: D_{i} and U_{i}, its expanded uncertainty (k = 2). (See the Appendix on page 32 of the Final Report). 
Linking is made via the pilot laboratory NPL, who also participated in the CCM.FK2.a comparison.
For each nominal value of the force, a reference value is computed inside the EURAMET key comparison, as the weighted mean deviation from the pilot value.
Based on the assumption that the performance of the common participants in both comparisons, the NPL and the PTB, has remained unchanged, it can be concuded that the EURAMET reference values are 0.6 10^{5} and 0.7 10^{5} lower than the CCM.FK2 key comparison reference values, at forces of 50 kN and 100 kN, respectively.
The degrees of equivalence found inside the EURAMET key comparison (offsets and expanded uncertainties) are adjusted accordingly, as explained on page 28 of the EUROMET.M.FK2 Final Report, to be transferred to key comparison CCM.FK2.
Linking of results for 100 kN is made via KRISS and NIM who also participated in the CCM.FK2.a and CCM.FK2.b comparisons.
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 50 kN
Measurements in key comparisons CCM.FK2.a and CCM.FK2.b correspond to the schemes A and B respectively, as explained on page 4 of the Final Report. Two transducers are used in scheme A, and three transducers are used in scheme B:
 in scheme A, the two transducers have a nominal capacity of 100 kN and are used to measure 50 kN and 100 kN forces;
 in scheme B, two transducers have a nominal capacity of 50 kN and are used to measure 50 kN forces, and one transducer has a nominal capacity of 100 kN and is used to measure 50 kN forces.
Detailed results of measurements obtained in both key comparisons are given in Section 9 on page 18 of the Final Report. They are then concatenated (see page 30 of the Final Report) in order to provide one set of measurements for 50 kN forces and one set of measurements for 100 kN forces. These two sets of results are shown in Figure 26 and Figure 27 on page 31 of the Final Report.
Date of measurements: 2004  2007
MEASURAND : Force
NOMINAL VALUE : 50 kN
Measurements in key comparisons CCM.FK2.a.1 were made in scheme A. Detailed description of the measurement results is given in Sections 8 and 9 of the CCM.FK2.a.1 Final Report.
Date of measurements: 2010  2011
MEASURAND : Force
NOMINAL VALUE : 50 kN
The same scheme is followed for the measurements in key comparison EUROMET.M.FK2, as explained on page 4 of the EUROMET.M.FK2 Final Report.
Results obtained by participating laboratories are given in Section 9 (starting on page 14) of the Final Report. The two sets of results (for 50 kN and 100 kN) are shown on Figures 18 and 19 on page 24 of the Final Report.
Date of measurements: 2007  2009
MEASURAND : Force
NOMINAL VALUE : 50 kN
The same scheme as in CCM.FK2.a and b is followed for the measurements in key comparisons APMP.M.FK2.a and APMP.M.FK2.b. The results are given in Section 6 of the Final Report.
Date of measurements: 2007  2014
CCM.FK2.a, CCM.FK2.b, CCM.FK2.a.1, EUROMET.M.FK2, APMP.M.FK2.a and APMP.M.FK2.b
MEASURAND : Force
NOMINAL VALUE : 100 kN
Measurements in key comparisons CCM.FK2.a and CCM.FK2.b correspond to the schemes A and B respectively, as explained on page 4 of the Final Report. Two transducers are used in scheme A, and three transducers are used in scheme B:
 in scheme A, the two transducers have a nominal capacity of 100 kN and are used to measure 50 kN and 100 kN forces;
 in scheme B, two transducers have a nominal capacity of 50 kN and are used to measure 50 kN forces, and one transducer has a nominal capacity of 100 kN and is used to measure 50 kN forces.
Detailed results of measurements obtained in both key comparisons are given in Section 9 on page 18 of the Final Report. They are then concatenated (see page 30 of the Final Report) in order to provide one set of measurements for 50 kN forces and one set of measurements for 100 kN forces. These two sets of results are shown in Figure 26 and Figure 27 on page 31 of the Final Report.
Date of measurements: 2004  2007
MEASURAND : Force
NOMINAL VALUE : 100 kN
Measurements in key comparisons CCM.FK2.a.1 were made in scheme A. Detailed description of the measurement results is given in Sections 8 and 9 of the CCM.FK2.a.1 Final Report.
Date of measurements: 2010  2011
MEASURAND : Force
NOMINAL VALUE : 100 kN
The same scheme is followed for the measurements in key comparison EUROMET.M.FK2, as explained on page 4 of the EUROMET.M.FK2 Final Report.
Results obtained by participating laboratories are given in Section 9 (starting on page 14) of the Final Report. The two sets of results (for 50 kN and 100 kN) are shown on Figures 18 and 19 on page 24 of the Final Report.
Date of measurements: 2007  2009
MEASURAND : Force
NOMINAL VALUE : 100 kN
The same scheme as in CCM.FK2.a is followed for the measurements in key comparisons APMP.M.FK2.a. The results are given in Section 6 of the Final Report.
Date of measurements: 2007  2014