CCT-K6 and SIM.T-K6.3

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -10 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in°C.

- 10 °C
Di
Participating institutes

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      1 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

1 °C
Di
Participating institutes

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      20 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

20 °C
Di
Participating institutes

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -50 °C

Degrees of equivalence represented by Dand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

- 50 °C
Di
Participating institutes

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -30 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

- 30 °C
Di
Participating institutes

CCT-K6 and SIM.T-K6.3

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -10 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

LABi Di Uneg,i Upos,i
°C
°C
°C
NPL 0.007 0.05
NMIJ -0.015 0.062
VSL 0.069 0.047
MIKES 0.031 0.046
INTA 0.013 0.044
INRIM 0.039 0.045
NIST -0.039 0.043
NMC, A*STAR -0.028 0.058
NIM -0.091 0.099
VNIIFTRI -0.031 0.041
INMETRO 0.04 0.2
Participating institutes
CCT-K6
SIM.T-K6.3

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      1 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

LABi Di Uneg,i Upos,i
°C
°C
°C
NPL 0.045 0.071
NMIJ 0.002 0.07
VSL -0.056 0.125
MIKES 0.017 0.061
INTA 0.022 0.059
INRIM 0.01 0.058
NIST -0.011 0.06
NMC, A*STAR -0.029 0.083
NIM -0.071 0.086
VNIIFTRI -0.026 0.058
INMETRO 0.04 0.21
INTI 0.001 0.31
Participating institutes
CCT-K6
SIM.T-K6.3
SIM.T-K6.7

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      20 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

LABi Di Uneg,i Upos,i
°C
°C
°C
NPL -0.014 0.049
NMIJ 0 0.062
VSL -0.005 0.057
MIKES -0.006 0.051
INTA 0.016 0.048
INRIM 0.015 0.047
NIST -0.006 0.05
NMC, A*STAR -0.028 0.082
NIM -0.097 0.073
VNIIFTRI -0.003 0.046
INMETRO 0.01 0.21
INTI 0.062 0.27
Participating institutes
CCT-K6
SIM.T-K6.3
SIM.T-K6.7

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -50 °C

Degrees of equivalence represented by Dand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

LABi Di Uneg,i Upos,i
°C
°C
°C
NPL 0.014 0.028
NMIJ -0.023 0.100
VSL -0.153 0.134
MIKES 0.037 0.043
INTA -0.012 0.034
INRIM 0.000 0.037
NMC, A*STAR -0.046 0.067
NIM -0.060 0.119
VNIIFTRI -0.011 0.032
NIST -0.012 0.142
Participating institutes
CCT-K6
CCT-K6.2

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -30 °C

Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.

LABi Di Uneg,i Upos,i
°C
°C
°C
NPL 0.034 0.064
NMIJ -0.050 0.057
VSL 0.015 0.105
MIKES 0.016 0.046
INTA -0.003 0.041
INRIM 0.027 0.040
NMC, A*STAR -0.028 0.062
NIM -0.055 0.094
VNIIFTRI -0.013 0.038
NIST 0.048 0.075
Participating institutes
CCT-K6
CCT-K6.2
Comparison
Comparison close
CC comparison
Linked comparison
SIM.T-K6.8
Metrology area, Sub-field Thermometry, Humidity
Description Comparison of dew/frost-point temperature standards
Time of measurements 2021 - 2022
Status Report in progress, draft B
Measurand Dew/frost point
-10 °C, 1 °C, 10 °C and 20 °C
Transfer device Chilled mirror hygrometer
Comparison type Key Comparison
Consultative Committee CCT (Consultative Committee for Thermometry)
Conducted by SIM (Inter-American Metrology System)
Comments This comparison replaces SIM.T-K6.6, which was abandoned in 2020 due to measurement problems that have now been resolved.
Pilot institute NIST
National Institute of Standards and Technology
United States
Contact person C. Meyer

+1 301 975 4825
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
NIST

National Institute of Standards and Technology, United States, SIM

INM (CO)

Instituto Nacional de Metrología de Colombia, Colombia, SIM

CCT-K6 and SIM.T-K6.3

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -10 °C

 

The key comparison reference value, xR, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, uR, of xR included the uncertainty of the weighted mean and the additionnal uncertainty contribution for the drift of the hygrometers. The calculation of key comparison reference value is explained in section 7.1 on page 44 of the Final Report.

xR = 0.096 °C, and uR = 0.019 °C 

The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in °C. (See section 7.3 on page 46 of the Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in °C: Dij and Uij its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).

 

Linking SIM.T-K6.3 to CCT-K6

The linking was made via NIST (United States of America) having participated in CCT-K6 (see Section 9 of the SIM.T-K6.7 Final Report).

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      1 °C

 

The key comparison reference value, xR, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, uR, of xR included the uncertainty of the weighted mean and the additionnal uncertainty contribution for the drift of the hygrometers. The calculation of key comparison reference value is explained in section 7.1 on page 44 of the Final Report.

xR = 0.111 °C, and uR = 0.028 °C 

The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in °C. (See section 7.3 on page 46 of the Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in °C: Dij and Uij its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).

 

Linking SIM.T-K6.3 to CCT-K6

The linking was made via NIST (United States of America) having participated in CCT-K6 (see Section 9 of the SIM.T-K6.7 Final Report).

 

Linking SIM.T-K6.7 to CCT-K6

The linking was made via INMETRO (Brazil) and NIST (United States of America) having participated both in SIM.T-K6.3, and NIST having participated in CCT-K6 (see Section 9 of the SIM.T-K6.7 Final Report).

CCT-K6, SIM.T-K6.3 and SIM.T-K6.7

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      20 °C

 

The key comparison reference value, xR, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, uR, of xR included the uncertainty of the weighted mean and the additionnal uncertainty contribution for the drift of the hygrometers. The calculation of key comparison reference value is explained in section 7.1 on page 44 of the Final Report.

xR = 0.147 °C, and uR = 0.022 °C 

The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in °C. (See section 7.3 on page 46 of the Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in °C: Dij and Uij its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).

 

Linking SIM.T-K6.3 to CCT-K6

The linking was made via NIST (United States of America) having participated in CCT-K6 (see Section 9 of the SIM.T-K6.7 Final Report).

 

Linking SIM.T-K6.7 to CCT-K6

The linking was made via INMETRO (Brazil) and NIST (United States of America) having participated both in SIM.T-K6.3, and NIST having participated in CCT-K6 (see Section 9 of the SIM.T-K6.7 Final Report).

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -50 °C

 

The key comparison reference value, xR, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, uR, of xR included the uncertainty of the weighted mean and the additionnal uncertainty contribution for the drift of the hygrometers. The calculation of key comparison reference value is explained in section 7.1 on page 44 of the Final Report.

xR = 0.055 °C, and uR = 0.011 °C 

The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in °C. (See section 7.3 on page 46 of the Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in °C: Dij and Uij its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).

 

Linking CCT-K6.2 to CCT-K6

The results of CCT-K6.2 are linked to CCT-K6 via NMIJ AIST who participated in both comparisons.

 

CCT-K6 and CCT-K6.2

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -30 °C

 

The key comparison reference value, xR, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, uR, of xR included the uncertainty of the weighted mean and the additionnal uncertainty contribution for the drift of the hygrometers. The calculation of key comparison reference value is explained in section 7.1 on page 44 of the Final Report.

xR = 0.090 °C, and uR = 0.017 °C 

The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in °C. (See section 7.3 on page 46 of the Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in °C: Dij and Uij its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).

 

Linking CCT-K6.2 to CCT-K6

The results of CCT-K6.2 were linked to CCT-K6 via NMIJ AIST who participated in both comparisons.

CCT-K6

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -10 °C

RLab i      measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the mid-point between the two instrument mean readings (See section 5 on page 31 of the Final Report)
ui          combined standard uncertainty of RLab i


The full set of data for the results and associated standard uncertainties reported by each laboratory i are available in Appendix 2, and 3 of the Final Report.

 

CCT-K6

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      1 °C

RLab i         measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the mid-point between the two instrument mean readings (See section 5 on page 31 of the Final Report)
ui             combined standard uncertainty of RLab i

 

The full set of data for the results and associated standard uncertainties reported by each laboratory i are available in Appendix 2, and 3 of the Final Report.

CCT-K6

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      20 °C

RLab i       measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the mid-point between the two instrument mean readings (See section 5 on page 31 of the Final Report)
ui           combined standard uncertainty of RLab i

 

The full set of data for the results and associated standard uncertainties reported by each laboratory i are available in Appendix 2, and 3 of the Final Report.

 

 

 

CCT-K6 

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -50 °C

RLab i    measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the mid-point between the two instrument mean readings (See section 5 on page 31 of the Final Report)
ui         combined standard uncertainty of RLab i
           

The full set of data for the results and associated standard uncertainties reported by each laboratory i are available in Appendix 2, and 3 of the Final Report.

CCT-K6

MEASURAND             Realization of local scale of dew-point temperature of humid gas
NOMINAL VALUE      -30 °C

RLab i    measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the mid-point between the two instrument mean readings (See section 5 on page 31 of the Final Report)
ui            combined standard uncertainty of RLab i
           

The full set of data for the results and associated standard uncertainties reported by each laboratory i are available in Appendix 2, and 3 of the Final Report.