CCTK6 and SIM.TK6.3
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 10 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in°C.
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 1 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 20 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 50 °C
Degrees of equivalence represented by D_{i }and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 30 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
CCTK6 and SIM.TK6.3
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 10 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
LAB_{i}  D_{i}  U_{neg,i}  U_{pos,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 
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 1 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
LAB_{i}  D_{i}  U_{neg,i}  U_{pos,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 
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 20 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
LAB_{i}  D_{i}  U_{neg,i}  U_{pos,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 
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 50 °C
Degrees of equivalence represented by D_{i }and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
LAB_{i}  D_{i}  U_{neg,i}  U_{pos,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 
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 30 °C
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in °C.
LAB_{i}  D_{i}  U_{neg,i}  U_{pos,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 
Metrology area, Subfield  Thermometry, Humidity 
Description  Realizations of local scales of dew/frostpoint temperature of humid air 
Time of measurements  2009  2010 
Status  Approved for equivalence 
Final Reports of the comparisons  
Measurand  Dewpoint temperature: 30 °C, 10 °C, 0 °C and 20 °C 
Transfer device  Dedicated transfer standard 
Comparison type  Key Comparison 
Consultative Committee  CCT (Consultative Committee for Thermometry) 
Conducted by  SIM (InterAmerican Metrology System) 
Comments 

Pilot institute 
NIST
National Institute of Standards and Technology United States 
Contact person  Peter HUANG +1 301 975 6210 
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" :
CCTK6 and SIM.TK6.3
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 10 °C
The key comparison reference value, x_{R}, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, u_{R}, of x_{R} 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.
x_{R} = 0.096 °C, and u_{R} = 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.TK6.3 to CCTK6
The linking was made via NIST (United States of America) having participated in CCTK6 (see Section 9 of the SIM.TK6.7 Final Report).
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 1 °C
The key comparison reference value, x_{R}, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, u_{R}, of x_{R} 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 x_{R} is given by a pair of terms: D_{i}_{ }and U_{i}, 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: D_{ij}_{ }and U_{ij}_{ }its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).
Linking SIM.TK6.3 to CCTK6
The linking was made via NIST (United States of America) having participated in CCTK6 (see Section 9 of the SIM.TK6.7 Final Report).
Linking SIM.TK6.7 to CCTK6
The linking was made via INMETRO (Brazil) and NIST (United States of America) having participated both in SIM.TK6.3, and NIST having participated in CCTK6 (see Section 9 of the SIM.TK6.7 Final Report).
CCTK6, SIM.TK6.3 and SIM.TK6.7
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 20 °C
The key comparison reference value, x_{R}, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, u_{R}, of x_{R} 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 x_{R} is given by a pair of terms: D_{i}_{ }and U_{i}, 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: D_{ij} and U_{ij }its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).
Linking SIM.TK6.3 to CCTK6
The linking was made via NIST (United States of America) having participated in CCTK6 (see Section 9 of the SIM.TK6.7 Final Report).
Linking SIM.TK6.7 to CCTK6
The linking was made via INMETRO (Brazil) and NIST (United States of America) having participated both in SIM.TK6.3, and NIST having participated in CCTK6 (see Section 9 of the SIM.TK6.7 Final Report).
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 50 °C
The key comparison reference value, x_{R,} was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, u_{R}, of x_{R} 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.
x_{R} = 0.055 °C, and u_{R} = 0.011 °C
The degree of equivalence of laboratory i with respect to x_{R }is given by a pair of terms: D_{i} and U_{i}, 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: D_{ij} and U_{ij} its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).
Linking CCTK6.2 to CCTK6
The results of CCTK6.2 are linked to CCTK6 via NMIJ AIST who participated in both comparisons.
CCTK6 and CCTK6.2
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 30 °C
The key comparison reference value, x_{R}, was obtained from the weighted mean of the participants' results excluding outliers. The standard uncertainty, u_{R}, of x_{R} 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.
x_{R} = 0.090 °C, and u_{R} = 0.017 °C
The degree of equivalence of laboratory i with respect to x_{R} is given by a pair of terms: D_{i} and U_{i}, 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: D_{ij} and U_{ij} its expanded uncertainty (k = 2) (See section 6 on page 34 of the Final Report).
Linking CCTK6.2 to CCTK6
The results of CCTK6.2 were linked to CCTK6 via NMIJ AIST who participated in both comparisons.
CCTK6
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 10 °C
R_{Lab i } measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the midpoint between the two instrument mean readings (See section 5 on page 31 of the Final Report)
u_{i} combined standard uncertainty of R_{Lab 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.
CCTK6
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 1 °C
R_{Lab i } measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the midpoint between the two instrument mean readings (See section 5 on page 31 of the Final Report)
u_{i} combined standard uncertainty of R_{Lab 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.
CCTK6
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 20 °C
R_{Lab i } measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the midpoint between the two instrument mean readings (See section 5 on page 31 of the Final Report)
u_{i} combined standard uncertainty of R_{Lab 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.
CCTK6
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 50 °C
R_{Lab i } measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the midpoint between the two instrument mean readings (See section 5 on page 31 of the Final Report)
u_{i} combined standard uncertainty of R_{Lab 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.
CCTK6
MEASURAND Realization of local scale of dewpoint temperature of humid gas
NOMINAL VALUE 30 °C
R_{Lab i } measurement result reported by each laboratory i which was calculated from the mean of simultaneous readings of two instruments, and taken as the midpoint between the two instrument mean readings (See section 5 on page 31 of the Final Report)
u_{i }combined standard uncertainty of R_{Lab 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.