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Comparison
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Results
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                   Air speed
NOMINAL VALUE           0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD  Ultrasonic anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

NOMINAL VALUE           0.5 m/s

0.5 m/s
Di
Participating institutes

NOMINAL VALUE           1 m/s

1 m/s
Di
Participating institutes

NOMINAL VALUE           2 m/s

2 m/s
Di
Participating institutes

NOMINAL VALUE           5 m/s

5 m/s
Di
Participating institutes

NOMINAL VALUE           10 m/s

10 m/s
Di
Participating institutes

NOMINAL VALUE           15 m/s

15 m/s
Di
Participating institutes

NOMINAL VALUE           20 m/s

20 m/s
Di
Participating institutes

NOMINAL VALUE           30 m/s

30 m/s
Di
Participating institutes

NOMINAL VALUE           40 m/s

40 m/s
Di
Participating institutes
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                    Air speed
NOMINAL VALUE            0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD   Laser Doppler anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

NOMINAL VALUE           0.5 m/s

0.5 m/s
Di
Participating institutes

NOMINAL VALUE           1 m/s

1 m/s
Di
Participating institutes

NOMINAL VALUE           2 m/s

2 m/s
Di
Participating institutes

NOMINAL VALUE           5 m/s

5 m/s
Di
Participating institutes

NOMINAL VALUE           10 m/s

10 m/s
Di
Participating institutes

NOMINAL VALUE           15 m/s

15 m/s
Di
Participating institutes

NOMINAL VALUE           20 m/s

20 m/s
Di
Participating institutes

NOMINAL VALUE           30 m/s

30 m/s
Di
Participating institutes

NOMINAL VALUE           40 m/s

40 m/s
Di
Participating institutes
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CCM.FF-K3.2011

 

OPTIONAL MEASURAND       Laser Doppler anemometer calibration using a primary standard

TRANSFER STANDARD           Laser Doppler anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

 

Calibration
Di
Participating institutes
Comparison
Comparison close
Results
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                   Air speed
NOMINAL VALUE           0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD  Ultrasonic anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

NOMINAL VALUE           0.5 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0051 0.0204
LNE-CETIAT -0.0008 0.0272
VSL -0.0311 0.0492
E+E -0.0221 0.0198
NMIJ -0.0092 0.0433
NIM -0.0003 0.0376
CMS -0.0014 0.0179
NIST 0.0131 0.0178
VNIIM -0.0109 0.0309
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           1 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0023 0.012
LNE-CETIAT 0.0066 0.0163
VSL -0.0147 0.013
E+E -0.01 0.0122
NMIJ -0.0048 0.0185
NIM -0.0009 0.0188
CMS 0.0022 0.0106
NIST 0.0109 0.0117
VNIIM -0.005 0.0186
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           2 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0088 0.0106
LNE-CETIAT 0.003 0.0132
VSL -0.0004 0.0134
E+E -0.0095 0.0115
NMIJ -0.0033 0.0115
NIM 0.0062 0.0171
CMS 0.0047 0.0109
NIST 0.0027 0.0101
INRIM -0.0001 0.0136
VNIIM -0.0036 0.0164
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           5 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0034 0.0046
LNE-CETIAT -0.0011 0.0072
VSL -0.0028 0.0101
E+E -0.0053 0.0066
NMIJ 0.0001 0.0059
NIM -0.001 0.0084
CMS 0.0005 0.0054
NIST 0.0047 0.0046
INRIM -0.0004 0.0092
VNIIM -0.0035 0.008
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           10 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0018 0.0042
LNE-CETIAT 0.0014 0.0066
VSL 0.0026 0.0102
E+E -0.0021 0.0064
NMIJ 0.0012 0.0048
NIM 0.0029 0.0066
CMS 0.0026 0.0053
NIST -0.0017 0.0043
INRIM -0.0074 0.0093
VNIIM -0.0018 0.0074
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           15 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0008 0.0041
LNE-CETIAT 0.0013 0.0063
VSL -0.0003 0.0101
E+E -0.0005 0.0064
NMIJ 0.001 0.0052
NIM -0.0021 0.0064
CMS 0.0071 0.0056
NIST -0.0019 0.0043
INRIM -0.0082 0.0093
VNIIM 0.0003 0.0072
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           20 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0004 0.004
LNE-CETIAT 0.0016 0.0062
VSL -0.0048 0.0103
E+E -0.0005 0.0063
NMIJ -0.0005 0.0052
NIM -0.002 0.0065
CMS 0.0087 0.0055
NIST -0.0019 0.0043
INRIM -0.0079 0.0092
VNIIM -0.0026 0.0071
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           30 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0009 0.0039
LNE-CETIAT 0.0039 0.006
VSL -0.0069 0.013
E+E 0.0001 0.0063
NMIJ -0.0003 0.0044
NIM -0.0008 0.007
NIST -0.0002 0.0043
INRIM -0.0061 0.0093
VNIIM -0.0027 0.0069
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           40 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0004 0.0038
LNE-CETIAT 0.0047 0.006
VSL -0.0111 0.015
E+E -0.0002 0.0062
NMIJ -0.0013 0.0041
NIST 0.001 0.0042
VNIIM -0.002 0.0068
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                    Air speed
NOMINAL VALUE            0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD   Laser Doppler anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

NOMINAL VALUE           0.5 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0003 0.0132
LNE-CETIAT 0.0005 0.0214
VSL -0.0411 0.0449
E+E 0.0012 0.0125
NIM 0.0026 0.007
CMS -0.0028 0.0043
NIST 0.0024 0.0048
VNIIM -0.0103 0.02
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           1 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.003 0.0079
LNE-CETIAT 0.0065 0.0131
VSL -0.0152 0.0101
E+E 0.0002 0.0082
NIM -0.0011 0.007
CMS -0.0007 0.0055
NIST 0.0032 0.0049
VNIIM -0.0041 0.0128
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           2 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0002 0.0055
LNE-CETIAT 0.0032 0.009
VSL -0.0013 0.0103
E+E -0.0009 0.0063
NMIJ -0.0026 0.0062
NIM 0.0004 0.0036
CMS -0.0004 0.0066
NIST -0.0003 0.0072
INRIM 0.0034 0.0101
VNIIM -0.0019 0.0093
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           5 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0021 0.0041
LNE-CETIAT -0.0005 0.0066
VSL -0.0043 0.0099
E+E -0.0012 0.0052
NMIJ 0.0006 0.0049
NIM -0.0006 0.0027
CMS -0.0018 0.005
NIST 0.0007 0.0038
INRIM 0.0004 0.0089
VNIIM -0.0029 0.0073
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           10 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0017 0.0036
LNE-CETIAT -0.0005 0.0058
VSL 0.0063 0.01
E+E -0.0022 0.0048
NMIJ -0.0005 0.0044
NIM 0.0002 0.0025
CMS 0.0003 0.0054
NIST -0.0009 0.0038
INRIM -0.0088 0.0089
VNIIM -0.0013 0.0066
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           15 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0018 0.0034
LNE-CETIAT 0.0001 0.0055
VSL 0.002 0.0102
E+E -0.0019 0.0046
NMIJ 0.0001 0.0047
NIM -0.0007 0.0037
CMS 0.0006 0.0051
NIST -0.0006 0.0037
INRIM -0.0077 0.009
VNIIM -0.0024 0.0063
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           20 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0017 0.0034
LNE-CETIAT -0.0003 0.0054
VSL 0.0024 0.0117
E+E -0.002 0.0046
NMIJ -0.0007 0.0047
NIM 0.0006 0.0027
CMS -0.0008 0.005
NIST -0.0009 0.0038
INRIM -0.0066 0.0091
VNIIM -0.0006 0.0062
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           30 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0014 0.0032
LNE-CETIAT 0.0001 0.0052
VSL 0.0025 0.0139
E+E -0.0015 0.0045
NMIJ -0.0012 0.0034
NIM 0.0014 0.0049
NIST -0.0002 0.0037
INRIM -0.0066 0.009
VNIIM -0.0032 0.0061
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1

NOMINAL VALUE           40 m/s

LABi Di Uneg,i Upos,i
-
-
-
PTB 0.0015 0.0031
LNE-CETIAT 0.0016 0.0052
VSL -0.0024 0.0149
E+E -0.0007 0.0044
NMIJ -0.0011 0.0025
NIST 0.0005 0.0037
VNIIM -0.0027 0.006
Participating institutes
CCM.FF-K3.2011
CCM.FF-K3.2011.1
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CCM.FF-K3.2011

 

OPTIONAL MEASURAND       Laser Doppler anemometer calibration using a primary standard

TRANSFER STANDARD           Laser Doppler anemometer

Degrees of equivalence: offset Di and expanded uncertainty (k = 2) Ui

 

LABi Di Uneg,i Upos,i
-
-
-
PTB -0.0006 0.0015
LNE-CETIAT -0.0002 0.0009
NMIJ 0.0003 0.0018
NIM -0.0005 0.0023
CMS 0.0024 0.0025
Participating institutes
CCM.FF-K3.2011
Comparison
Comparison close
CC comparison
Linked comparison
CCM.FF-K3.2011
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Metrology area, Sub-field Mass and related quantities, Fluid Flow
Description Air speed
Time of measurements 2013 - 2015
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2017, 54, Tech. Suppl., 07013
Measurand Air speed at 0.5 m/s, 1.0 m/s, 2.0 m/s, 5.0 m/s, 10.0 m/s, 15.0 m/s, 20.0 m/s, 30.0 m/s and 40.0 m/s
Transfer device An ultrasonic anemometer and a aser Doppler anemometer (LDA)
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 9 May 2017

Air speed measured by ultrasonic and laser doppler anemometers

Optional: laser doppler anemometer calibration

 

 
Pilot institute LNE
Laboratoire national de métrologie et d'essais
France
Contact person Isabelle Caré
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

CMS

ITRI Center for Measurement Standards, Chinese Taipei, APMP

E+E

E+E Elektronik, Austria, EURAMET

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

LNE-CETIAT

Centre Technique des Industries Aérauliques et Thermiques, France, EURAMET

NIM

National Institute of Metrology, China, APMP

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

VSL

VSL, Netherlands, EURAMET

Comparison
Comparison close
Results
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                   Air speed
NOMINAL VALUE           0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD  Ultrasonic anemometer

 

CCM.FF-K3.2011

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both dimensionless: Di = (xi - xR) and Ui (k=2) its expanded uncertainty, with Ui = 2 [ (ULab i / 2)2 - (UR / 2)2 ]1/2.

 

For each nominal air speed value, the key comparison reference value, xR, is computed as the weighted mean of the participants' results. Its expanded uncertainty (k = 2), UR, is computed as explained in section 7.2.1 of the Final Report, noting an additional contribution due to the instability of the transfer standard was included when calculating the uncertainty.

 


Linking CCM.FF-K3.2011.1 to CCM.FF-K3.2011

The results obtained by VNIIM in the bilateral comparison CCM.FF-K3.2011.1 were linked to CCM.FF-K3.2011 via PTB who participated in both comparisons.

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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                    Air speed
NOMINAL VALUE            0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD   Laser Doppler anemometer

 

 

CCM.FF-K3.2011

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both dimensionless: Di = (xi - xR) and Ui (k=2) its expanded uncertainty, with Ui = 2 [ (ULab i / 2)2 - (UR / 2)2 ]1/2.

 

For each nominal air speed value, the key comparison reference value, xR, is computed as the weighted mean of the participants' results. Its expanded uncertainty (k = 2), UR, is computed as explained in section 7.2.2 of the Final Report, noting an additional contribution due to the instability of the transfer standard was included when calculating the uncertainty.

 

 

Linking CCM.FF-K3.2011.1 to CCM.FF-K3.2011

The results obtained by VNIIM in the bilateral comparison CCM.FF-K3.2011.1 were linked to CCM.FF-K3.2011 via PTB who participated in both comparisons.

 

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CCM.FF-K3.2011

 

OPTIONAL MEASURAND       Laser Doppler anemometer calibration using a primary standard

TRANSFER STANDARD           Laser Doppler anemometer

 

The key comparison reference value, xR, and iIts expanded uncertainty (k = 2), UR, are computed for the overall dataset as explained in Section 8 of the CCM.FF-K3.2011 Final Report.

                                                     xR = 0.9988         UR = 0.0008

 

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms, both dimensionless: Di = (xi - xR) and Ui (k=2) its expanded uncertainty, with Ui = 2[ (ULab i / 2)2 - (UR / 2)2 ]1/2.

Comparison
Comparison close
Results
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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                   Air speed
NOMINAL VALUE           0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD  Ultrasonic anemometer

 

CCM.FF-K3.2011

 

xi                measurement result reported by laboratory i

ULab i         expanded uncertainty (k = 2) of xi

The measurement result, xi, reported by laboratory i is the ratio of the reference air speed measured by the laboratory which was obtained from five repeated measurements, to the air speed reading of the transfer standard. xi is a dimensionless quantity.

 

 

 

CCM.FF-K3.2011.1

 

The results obtained in CCM.FF-K3.2011.1 are listed in Section 7 of the CCM.FF-K3.2011.1 Final Report.

 

 

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CCM.FF-K3.2011 and CCM.FF-K3.2011.1

MEASURAND                    Air speed
NOMINAL VALUE            0.5 m/s, 1 m/s, 2 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 30 m/s and 40 m/s


TRANSFER STANDARD   Laser Doppler anemometer

 

CCM.FF-K3.2011

 

xi               measurement result reported by laboratory i
ULab i        expanded uncertainty (k = 2) of xi

The measurement result, xi, reported by laboratory i is the ratio of the reference air speed measured by the laboratory which was obtained from five repeated measurements, to the air speed reading of the transfer standard. xi is a dimensionless quantity.

 

 

 

CCM.FF-K3.2011.1

 

The results obtained in CCM.FF-K3.2011.1 are listed in Section 7 of the CCM.FF-K3.2011.1 Final Report.

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CCM.FF-K3.2011

 

OPTIONAL MEASURAND       Laser Doppler anemometer calibration using a primary standard

TRANSFER STANDARD           Laser Doppler anemometer

 

The measurement results obtained by the PTB, LNE-CETIAT, NMIJ, NIM and CMS are listed in Appendix A of the CCM.FF-K3.2011 Final Report.