BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1592 Hz

Degrees of equivalence represented by D_i = x_i  and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1000 Hz

Degrees of equivalence represented by D_i = x_i  and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1592 Hz

Degrees of equivalence represented by D_i = x_i  and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1000 Hz

Degrees of equivalence represented by D_i = x_i  and its expanded uncertainty U_i at a 95 % level of confidence, both expressed in 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1592 Hz

Since 20 May 2019, the key comparison reference value x_R is the BIPM value, known in terms of the value of the von Klitzing constant R_K = h/e² = 25 812.807 46 Ω, using the fixed numerical values for the Plack constant h and the elementary charge e. Its standard uncertainty u_R is evaluated at 3.7 x 10^-8.

Before this date, the BIPM value was based on the recommended value of the von Klitzing constant R_K-90 = 25 812.807 Ω. Its standard uncertainty u_R was evaluated at 3.7 x 10^-8, excluding the uncertainty on R_K-90. This uncertainty was included in the u_i values. Furthermore, for institutes that based their measurements on a calculable capacitor, the relative standard uncertainty associated with the use of R _K-90, 1 × 10^-7 was included in u_i. Further details can be found here.

The degrees of equivalence of each institute with respect to the key comparison reference value x_R is given by a pair of terms: D_i = x_i and its expanded uncertainty (k = 2), U_i = 2 u_i , both expressed in 10^-8. 

The link to the reference value of the key comparison CCEM-K4 can be established through the BIPM degree of equivalence in CCEM-K4 which is D_BIPM = -1.8 x 10^-8 with an expanded uncertainty (k = 2) U_BIPM = 10.5 x 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1000 Hz

Since 20 May 2019, the key comparison reference value x_R is the BIPM value, known in terms of the value of the von Klitzing constant R_K = h/e² = 25 812.807 46 Ω, using the fixed numerical values for the Plack constant h and the elementary charge e. Its standard uncertainty u_R is evaluated at 3.7 x 10^-8.

Before this date, the BIPM value was based on the recommended value of the von Klitzing constant R_K-90 = 25 812.807 Ω. Its standard uncertainty u_R was evaluated at 3.7 x 10^-8, excluding the uncertainty on R_K-90. This uncertainty was included in the u_i values. Furthermore, for institutes that based their measurements on a calculable capacitor, the relative standard uncertainty associated with the use of R _K-90, 1 × 10^-7 was included in u_i. Further details can be found here.

The degrees of equivalence of each institute with respect to the key comparison reference value x_R is given by a pair of terms: D_i = x_i and its expanded uncertainty (k = 2), U_i = 2 u_i , both expressed in 10^-8.

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1592 Hz

Lab_i            participating institute

x_i                    relative difference between the result of measurement of laboratory i and that of the BIPM

u_i                   combined standard uncertainty of x_i

(a) Comparison performed before the redefinition of the SI on 20 May 2019. The Laboratory based its measurements on the recommended value of the von Klitzing constant, R_K-90 = 25 812.807 Ω.

(b) Comparison performed before the redefinition of the SI on 20 May 2019. The Laboratory based its measurements on a calculable capacitor. u_i includes a standard uncertainty of 1×10^-7 for the comparison with the BIPM quantized Hall resistance (QHR).

*Additional information may be found in Metrologia, 2003, 40, 264-270

Measurement of the relative difference in capacitance C between 1000 Hz and 1592 Hz, d = (C₁₅₉₂ - C₁₀₀₀)/C₁₀₀₀

d_i      difference between the result of measurement of laboratory i and that of the BIPM

u(d_i)     combined standard uncertainty of d_i

BIPM.EM-K14.a 

MEASURAND          Capacitance

NOMINAL VALUE        10 pF

PARAMETER VALUE       1000 Hz

Lab_i          participating institute

x_i                  relative difference between the result of measurement of laboratory i and that of the BIPM

u_i                 combined standard uncertainty of x_i

(a) Comparison performed before the redefinition of the SI on 20 May 2019. The Laboratory based its measurements on the recommended value of the von Klitzing constant, R_K-90 = 25 812.807 Ω.

(b) Comparison performed before the redefinition of the SI on 20 May 2019. The Laboratory based its measurements on a calculable capacitor. u_i includes a standard uncertainty of 1×10^-7 for the comparison with the BIPM quantized Hall resistance (QHR).

*Additional information may be found in Metrologia, 2003, 40, 264-270

Measurement of the relative difference in capacitance C between 1000 Hz and 1592 Hz, d = (C₁₅₉₂ - C₁₀₀₀)/C₁₀₀₀

d_i      difference between the result of measurement of laboratory i and that of the BIPM

u(d_i)     combined standard uncertainty of d_i