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.
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.
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.
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 Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in °C.
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.
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 |
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 |
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 |
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 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 | 0.028 | ||
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 |
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 |
Metrology area, Sub-field | Thermometry, Humidity |
Description | Comparison of humidity standards: dew and frost point temperatures |
Time of measurements | 2003 - 2010 |
Status | Approved for equivalence |
Final Reports of the comparisons | |
Measurand | Temperature: -50 °C to 20 °C |
Transfer device | Two chilled-mirror hygrometers |
Comparison type | Key Comparison |
Consultative Committee | CCT (Consultative Committee for Thermometry) |
Conducted by | CCT (Consultative Committee for Thermometry) |
Comments | Results published on 27 May 2015 Comparison of humidity standards
|
Pilot institute |
NPL
National Physical Laboratory United Kingdom |
Contact person | S. Bell +44 (0) 20 8943 6402 |
Pilot laboratory | |
---|---|
NPL |
National Physical Laboratory, United Kingdom, EURAMET |
INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
INTA |
Instituto Nacional de Técnica Aeroespacial, Spain, EURAMET |
MIKES |
VTT Technical Research Centre of Finland Ltd, Centre for Metrology/Mittatekniikan keskus, Finland, EURAMET |
NIM |
National Institute of Metrology, China, APMP |
NIST |
National Institute of Standards and Technology, United States, SIM |
NMC, A*STAR |
National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP |
NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
VNIIFTRI |
Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET |
VSL |
VSL, Netherlands, EURAMET |
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" :
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.