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SubNo 
Field 
Comparison inentifier 
Description 
Start Year 
Finish Year 
Comparison type 
Field 
Parameter(s) 
Status 
Pliot 
Publish Year 
1 
EM 
APMP.EM K4 
capacitors 
1992 
1994 
K 
Electricity and Magnetism, Capacitance 
Capacitance: 10 pF Frequency: 1592 Hz 
Approved for provisional equivalence 
KRISS 

2 
EM 
APMP.EM K4.1 
capacitors 
2004 
2005 
K 
Electricity and Magnetism, Capacitance 
Capacitance: 10 pF Frequency: 1592 Hz 
Approved for equivalence, Results available 
NMIA 
2009 
3 
EM 
APMP.EM S1 
capacitors 
1992 
1994 
S 
Electricity and Magnetism, Capacitance 
Capacitance: 100 pF, 1 nF; Frequency: 1.592 kHz, 1 kHz 
Published 
KRISS 

4 
EM 
APMP.EM S7 
capacitors 
2003 
2006 
S 
Electricity and Magnetism, Capacitance 
Capacitance: 100 pF; Frequency: 1.592 kHz, 1 kHz 
Approved and published 
NMIA 
2008 
5 
EM 
APMP.EM.BIPM K11 
DC voltage, Zener diode 
1996 
1997 
K 
Electricity and Magnetism, DC Voltage and Current 
DC voltage: 1.018 V and 10 V 
Approved for provisional equivalence 
SPRING 

6 
EM 
BIPM.EM K10.a 
DC voltage, Josephson standards 
1991 
1991 
K 
Electricity and Magnetism, DC Voltage and Current 
DC voltage: 1.018 V 
approved for equivalence 
BIPM 

7 
EM 
CCEM K1 
resistance standards 
1990 
1991 
K 
Electricity and Magnetism, Resistance 
Resistance: 1 ohm and 10 kiloohms 
Approved for provisional equivalence 
BIPM 

8 
EM 
CCEM K10 
Comparison of resistance standards 
2001 
2003 
K 
Electricity and Magnetism, Resistance 
Resistance: 100 ohms 
Approved for equivalence, Results available 
PTB 
2007 
9 
EM 
CCEM K11 
AC/DC voltage transfer difference at low voltages 
2001 
2003 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Voltage: 10 mV and 100 mV Frequency: 1 kHz to 1 MHz 
Approved for equivalence, Results available 
SP( 
2007 
10 
EM 
CCEM 
Comparison of resistance standards 
1996 
2000 
K 
Electricity and Magnetism, Resistance 
Resistance: 10 megaohms and 1 gigaohm； Voltage: 10 V, 50 V, 91 V or 100 V 
Approved for equivalence, Results available 
NIST 

11 
EM 
CCEM K3 
Comparison of inductors 
1989 
1999 
K 
Electricity and Magnetism, Inductance 
Inductance: 10 mH Frequency: 1 kHz 
Approved for equivalence, Results available 
PTB 

12 
EM 
CCEM K4 
Comparison of capacitors 
1996 
1998 
K 
Electricity and Magnetism, Capacitance 
Capacitance, 10 pF Frequency: 1592 Hz 
Approved for equivalence, Results available 
NIST 

13 
EM 
CCEM K5 
AC power at 50/60 Hz 
1996 
2000 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag 
Approved for equivalence, Results available 
NIST 

14 
EM 
CCEM K6.a 
Comparison of AC/DC voltage transfer standards 
1993 
1999 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Voltage: 3 V Frequency: 1 kHz, 20 kHz, 100 kHz and 1 MHz 
Approved for equivalence, Results available 
PTB 

15 
EM 
CCEM K6.b 
Comparison of AC/DC voltage transfer standards 
1995 
1999 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Voltage: 500 V to 1000 V Frequency: 50 kHz to 100 kHz 
Activity transferred to CCEMK9 
BNMLNE 

16 
EM 
CCEM K7 
AC voltage ratio 
1999 
2003 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Frequency: 1 kHz 
Approved for equivalence, Results available 
NPL 

17 
EM 
CCEM K8 
Comparison of DC voltage ratios 
1999 
2001 
K 
Electricity and Magnetism, DC Voltage and Current 
Ratio: 1000 V / 10 V and 100 V / 10 V 
Approved for equivalence, Results available 
IEN 

18 
EM 
CCEM K9 
Comparison of high voltage AC/DC converters 
2000 
2002 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Voltage: 1000 V, 500 V and 200 V Frequency: 1 kHz, 10 kHz, 20 kHz, 50 kHz and 100 kHz 
Approved for equivalence, Results available 
LNE 
2006 
19 
EM 
CCEM.M K1 
Comparison of low frequency magnetic flux density 
2001 
2003 
K 
Electricity and Magnetism, Magnetism 
Frequency: DC to 20 kHz 
Approved for equivalence, Results available 
PTB 

20 
EM 
APMP.EM K10 
Resistance standards 
2008 

K 
Electricity and Magnetism, Resistance 
Resistance: 100 ohms 
Planned 
NIM 

21 
EM 
APMP.EM K8 
DC voltage ratios 
2008 

K 
Electricity and Magnetism, DC Voltage and Current 
Ratio: 1000 V / 10 V and 100 V / 10 V 
Planned 
NIM 

22 
EM 
APMP.EM 
Resistance standards 
2010 
2011 
K 
Electricity and Magnetism, Resistance 
Resistance: 10 megaohms and 1 gigaohm 
In progress 
KRISS 

23 
EM 
EURAMET.EM S36 
Calibration of high voltage partial discharge measurement systems 
2012 
2014 
S 
Electricity and Magnetism, High voltage and current 

Planned 
SP 

24 
EM 
APMP.EM S14 
Earthlevel DC magnetic flux density 
2013 
__ 
S 
Electricity and Magnetism, Magnetism 

Protocol complete 
VNIM 

RF 

25 
RF 
CCEM.RF K13.CL 
Voltage measurements 


K 
Electricity and Magnetism, Radio frequencies 
Voltage:1mV Frequency: 30 MHz 
Approved for provisional equivalence 
PTB 

26 
RF 
CCEM.RF K15.CL 
Attenuation measurements 


K 
Electricity and Magnetism, Radio frequencies 
Frequency: 30 MHz 
Approved for provisional equivalence 
PTB 

27 
RF 
CCEM.RF K16.CL 
Measurement of reflection coefficient 


K 
Electricity and Magnetism, Radio frequencies 
Frequency: 500 MHz, 3 GHz and 7 GHz 
Approved for provisional equivalence 
PTB 

28 
RF 
CCEM.RF K19.CL 
Attenuation in a 50 ohm coaxial line 
2001 
2005 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 60 MHz and 5 GHz 
Approved for equivalence, Results available 
NPL 
2009 
29 
RF 
CCEM.RF K2.W 
Noise power in waveguide 
1985 
1997 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 9 GHz, 10.5 GHz and 11.2 GHz 
Approved for provisional equivalence 
NPL 

30 
RF 
CCEM.RF K20 
Measurements of electric field strength 
1999 
2004 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 10 MHz to 1 GHz (13 discrete values among which four were selected for the K: 30 MHz, 100 MHz, 300 MHz, and 900 MHz) 
Approved for equivalence, Results available 
METAS, 
2006 
31 
RF 
CCEM.RF K21.F 
Comparison of antenna factors 
2002 
2004 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 300 MHz and 900 MHz 
Approved for equivalence, Results available 
NPL 
2006 
32 
RF 
CCEM.RF K23.F 
Antenna gain 
2009  

K 
Electricity and Magnetism, Radio frequencies 
Frequencies: 12.4 GHz, 15 GHz and 18 GHz 
In progress 
NIST 

33 
RF 
CCEM.RF K24.F 
Correction factor for Efield measurements 
2010 
2011 
K 
Electricity and Magnetism, Radio frequencies 
Frequencies: 1 GHz, 2.45 GHz, 10 GHz and 18 GHz Indicated field levels: 10 V/m, 30 V/m and 100 V/m 
In progress 
NPL 

34 
RF 
CCEM.RF K4.CL 
Voltage measurements 
1997 
2002 
K 
Electricity and Magnetism, Radio frequencies 
Voltage: 1 V ； Frequency: 1 MHz to 300 MHz, 1 GHz (option) 
Approved for provisional equivalence 
NIST 
2010 
35 
RF 
CCEM.RF K5.b.CL 
Reflection coefficient / S parameters in type N connectors 
2003 
2006 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 2 GHz to 18 GHz 
Approved for equivalence, Results available 
NPL 
2010 
36 
RF 
CCEM.RF K5.c.CL 
Reflection coefficient / S parameters in PC3.5 
2012 
2015 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 50 MHz to 33 GHz 
Planned 
NMIJ 

37 
RF 
CCEM.RF K8.CL 
Power in 50 ohm coaxial lines 
1998 
2001 
K 
Electricity and Magnetism, Radio frequencies 
Calibration factor of typeN and typePC7 thermistor mounts Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz 
Approved for equivalence, Results available 
NmiVSL 

38 
RF 
CCEM.RF K25.W 
RF power from 33 GHz to 50 GHz in waveguide 
2010 
2012 
K 
Electricity and Magnetism, Radio frequencies 
18 frequencies from 33 GHz to 50 GHz in the R400 waveguide band 
In progress 
PTB 

39 
RF 
APMP.EM.RF K19.CL 
Attenuation in a 50 ohm coaxial line 
2007 
2008 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 60 MHz and 5 GHz 
Approved for equivalence, Results available 
NIM 
2010 
40 
RF 
APMP.EM.RF K8.CL 
Power in 50 ohm coaxial lines 
2012 
2013 
K 
Electricity and Magnetism, Radio frequencies 
Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz 
Protocol complete 
NMIJ 

41 
RF 
APMP.EMK5.1 
AC power at 50 Hz/60 Hz 
2010 
2013 
K 
Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer 
Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag 
In progress 
NIM 

Time and Frequency 

1 
TF 
CCTF K001.UTC 
Calculation of the reference time scale UTC (Coordinated Universal Time) 
1977 
1977 
K 
Time and Frequency, Time 
UTC(k) is the local representation of UTC maintained by the laboratory k 
Ongoing, approved for equivalence, Results available 
BIPM 
2006，2007,2008,2009,2010 