CCM.V-K1.A and COOMET.M.V-K1
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 10 mm2/s at 20 °C
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in (mm2/s)×10-2
xR = 9.6519 mm2/s and uR = 0.0062 mm2/s
Red diamonds: CCM.V-K1.A participants maintaining an independent scale
Open red circles: other CCM.V-K1.A participants
Green triangles: participants in COOMET.M.V-K1 only
CCM.V-K1.A and COOMET.M.V-K1
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 10 mm2/s at 20 °C
The following table gives the degrees of equivalence with respect of the CCM.V-K1.A key comparison reference value: Di and expanded uncertainty Ui (k = 2) expressed in (mm2/s)×10-2.
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Mass and related quantities, Viscosity |
| Description | Viscosity measurements of standard liquids |
| Time of measurements | 2002 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Kinematic viscosity: 10 mm2/s |
| Parameters | Temperature: 20 °C |
| Transfer device | Standard liquid A |
| 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 | The standard liquid A is a poly-alpha-olefine with a density of 0.7952 g/cm3 and a surface tension of 27.93 mN/m. CCM.V-K1.A results published on 22 December 2003 Viscosity measurements of standard liquids COOMET.M.V-K1 results obtained at nominal value 30 mm2/s at 20 °C are linked to those of CCM.V-K1.A. |
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | H. Bauer +49 (0) 531 592 3100 |
| Additional |
| Pilot laboratory | |
|---|---|
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| BNM-LNE |
Bureau National de Métrologie - Laboratoire National d'Essais, France, EURAMET |
| CANNON |
CANNON Instrument Company, United States, SIM |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| CNR-IMGC |
Consiglio Nazionale delle Ricerche - Istituto di Metrologia G. Colonnetti (until 2006), Italy, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INM |
National Institute of Metrology, Romania, EURAMET |
| IPQ |
Instituto Portugues da Qualidade, Portugal, EURAMET |
| NIS |
National Institute for Standards, Egypt, AFRIMETS |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NML-SIRIM |
National Metrology Laboratory, SIRIM Berhad (became NMIM), Malaysia, APMP |
| NMi-VSL |
Nederlands Meetinstituut - Van Swinden Laboratorium (became VSL in 2009), Netherlands, EURAMET |
| NPLI |
CSIR National Physical Laboratory of India, India, APMP |
| NRCCRM |
National Research Centre for Certified Reference Materials, merged in NIM (National Institute of Metrology) starting 1st January 2006, China, APMP |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
This page proposes print-out 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.V-K1.A and COOMET.M.V-K1
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 10 mm2/s at 20 °C
|
The key comparison reference value, xR, is calculated as the arithmetic mean of the results of those laboratories which maintain an independent scale. Its standard uncertainty, uR, is calculated as the uncertainty of the arithmetic mean. xR = 9.6519 mm2/s and uR = 0.0062 mm2/s |
|
The degree of equivalence of each laboratory with respect to the key comparison reference value is given by a pair of terms: |
| The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij = Di - Dj = (xi - xj) and Uij its expanded uncertainty (k = 2), both expressed in mm2/s, Uij = 2xR(ui2 + uj2)1/2. The full matrix of equivalence is not computed here. |
|
The degrees of equivalence of the three laboratories which participated in key comparison COOMET.M.V-K1 for nominal value 30 mm2/s, relative to the CCM.V-K1.A key comparison reference value are deduced from the results evaluated for 10 mm2/s as explained in Section 4 of the COOMET.M.V-K1 Final Report. |
CCM.V-K1.A and COOMET.M.V-K1
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 10 mm2/s at 20 °C
xi : result of measurement carried out by laboratory i
ui : relative standard uncertainty of xi
| Lab i | xi / (mm2/s) |
ui / 10-3 |
Date of measurement |
| BNM-LNE |
9.6355 |
1.00 |
May/July 02 |
| CANNON |
9.6659 |
0.64 |
May/July 02 |
| GUM |
9.6633 |
0.38 |
May/July 02 |
| CNR-IMGC |
9.5970 |
0.65 |
May/July 02 |
| NMIJ |
9.6590 |
0.28 |
May/July 02 |
| NMi-VSL |
9.6530 |
0.80 |
May/July 02 |
| NRCCRM |
9.6598 |
0.41 |
May/July 02 |
| PTB |
9.6557 |
0.47 |
May/July 02 |
| SMU |
9.6537 |
0.85 |
May/July 02 |
| UME |
9.6726 |
0.96 |
May/July 02 |
| VNIIM |
9.6558 |
0.46 |
May/July 02 |
| BEV | 9.6640 | 1.30 | May/July 02 |
| CENAM | 9.6566 | 1.03 | May/July 02 |
| INM(RO) | 9.6452 | 0.69 | May/July 02 |
| IPQ | 9.6497 | 2.50 | May/July 02 |
| NIS | 9.6824 | 1.58 | May/July 02 |
| NPLI | 9.6718 | 1.26 | May/July 02 |
| NML-SIRIM | 9.6046 | 3.20 | May/July 02 |
Laboratories maintaining an independent scale
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 30 mm2/s at 20 °C
xiCOO : result of measurement carried out by laboratory i
uiCOO : relative standard uncertainty of xiCOO
| Lab i | xiCOO / (mm2/s) |
uiCOO / 10-3 |
Date of measurement |
| BelGIM | 28.545 | 2.1 | 2005 |
| UkrCSM | 28.539 | 1.2 | 2005 |
| BIM | 28.529 | 1.0 | 2005 |
| VNIIM | 28.557 | 1.0 | 2005 |
In order to link the results of key comparison COOMET.M.V-K1, taken at nominal value 30 mm2/s, to those of key comparison CCM.V-K1.A, taken at nominal value 10 mm2/s, COOMET data were evaluated for a kinematic viscosity of 10 mm2/s, according to the procedure described in Section 4 of the COOMET.M.V-K1 Final Report, which is based of the common participation of VNIIM in both key comparisons.
The resulting values are given in the following table for the three laboratories which participated in COOMET.M.V-K1 only.
MEASURAND : Kinematic viscosity
NOMINAL VALUE : 10 mm2/s at 20 °C
xi : result of measurement carried out by laboratory i (evaluated for the CCM.V-K1.A nominal value)
ui : relative standard uncertainty of xi
| Lab i | xi / (mm2/s) |
ui / 10-3 |
Date of measurement |
| BelGIM | 9.6517 | 2.2 | 2005 |
| UkrCSM | 9.6497 | 1.4 | 2005 |
| BIM | 9.6463 | 1.2 | 2005 |
