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Korea, Republic of, KRISS (Korea Research Institute of Standards and Science)
Complete CMCs in Electricity and Magnetism for Korea, Republic of (.PDF file)
AC power and energy: single phase (frequency . Energy meter, 3 J to 1.2E+06 J
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µJ/(VAs): 80 to 120
Direct comparison
Power factor: 0.25 to 1
Voltage: 120 V to 240 V
Frequency: 50 Hz to 60 Hz
Measurement time: 1 s to 100 s
Approved on 10 November 2014
Internal NMI service identifier: KRISS/7.1.1b
Uncertainty table
 
AC power and energy: three phase. Energy meter, 2.5 J to 3.6E+06 J
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µJ/(VAs): 100 to 200
Direct comparison
Power factor: 0.25 to 1
Voltage per phase: 100 V to 240 V
Frequency: 50 Hz to 60 Hz
Measurement time: 1 s to 100 s
Approved on 10 November 2014
Internal NMI service identifier: KRISS/7.1.3a
Uncertainty table
 
AC power and energy: three phase. Power meter, wattmeter, 1.8 W to 3.6E+04 W
Relative expanded uncertainty (k = 2, level of confidence 95%) in µW (VA)-1: 100 to 150
Direct comparison
Power factor: 0.3 to 1
Voltage per phase: 60 V to 240 V
Frequency: 45 Hz to 65 Hz
Voltage: 1 V
Approved on 10 November 2014
Internal NMI service identifier: KRISS/7.1.3b
Uncertainty table
 
High DC voltage: sources. DC kilovolt source, 2 kV to 100 kV
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 170
Divided voltage measurement
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.1.1
 
High DC voltage: meters. DC kilovolt meter, 2 kV to 100 kV
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 170
Comparison with divided voltage
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.1.2
 
High DC voltage: ratios. High voltage resistive divider, DC high voltage probe, 1E-05 to 1E-04
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 150
Ratio calibration at low voltage
Maximum input voltage: 100 kV
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.1.3
 
Magnetic field below 50 kHz: magnetic flux. Fluxmeter, 0.0001 Wb to 10 Wb
Relative expanded uncertainty (k = 2, level of confidence 95 %) in mWb/Wb: 0.7
Fluxmeter, voltage-time integral
Sampling frequency: 100 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.1
 
Magnetic fields below 50 kHz: DC magnetic flux density and applied magnetic field strength. Magnetometer, solenoid coil, Helmholtz coil, electromagnet, 0.04 T to 2.5 T
Relative expanded uncertainty (k = 2, level of confidence 95%) in µT/T: 5
Nuclear Magnetic Resonance (NMR), electromagnet
Resonance frequency: 1 MHz to 150 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.2a
 
Magnetic fields below 50 kHz: DC magnetic flux density and applied magnetic field strength. Magnetometer, solenoid coil, Helmholtz coil, 1 mT to 40 mT
Relative expanded uncertainty (k = 2, level of confidence 95 %) in mT/T: 0.25
Helium-4 Atomic Magnetic Resonance (AMR), Helmholtz coil
Resonance frequency: 3 MHz to 300 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.2b
 
Magnetic fields below 50 kHz: DC magnetic flux density and applied magnetic field strength. Reference magnet with air gap, 0.001 T to 0.5 T
Relative expanded uncertainty (k = 2, level of confidence 95 %) in mT/T: 2
Hall magnetometer, NMR, AMR
Minimum air gap size: 2 mm
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.2d
 
Magnetic fields below 50 kHz: AC magnetic flux density and applied magnetic field strength. Field generator, AC magnetometer, 0.001 mT to 1 mT
Relative expanded uncertainty (k = 2, level of confidence 95 %) in mT/T: 2 to 5
Direct comparison with search coil
Frequency: 0.1 kHz to 20 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.3
Uncertainty table
 
Magnetic fields below 50 kHz: turn area (ratio of magnetic flux and magnetic flux density). Sensing coil, area turns, 0.005 m2 to 0.3 m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in cm2/m2: 50
Fluxmeter, NMR
Coil size: smaller than a square of side length 10 cm
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.2.6
 
Electromagnetic fields above 50 kHz: electric field strength. Field probe, 1 V/m to 600 V/m
Relative expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
TEM cell
Frequency: 10 kHz to 300 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.3.1a
Uncertainty table
 
Electromagnetic fields above 50 kHz: electric field strength. Field probe, 1 V/m to 100 V/m
Relative expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Anechoic chamber
Frequency: 0.2 GHz to 18 GHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.3.1b
Uncertainty table
 
Electromagnetic fields above 50 kHz: magnetic field strength. Field probe, 0.003 A/m to 1.6 A/m
Relative expanded uncertainty (k = 2, level of confidence 95%) in dB: 1.5
TEM cell
Frequency: 10 kHz to 300 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.3.2
Uncertainty table
 
Electromagnetic fields above 50 kHz: power flux density. Field probe, 0.003 W/m2 to 26.5 W/m2
Relative expanded uncertainty (k = 2, level of confidence 95 %) in dB: 1
Anechoic chamber
Frequency: 0.2 GHz to 18 GHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/10.3.3
Uncertainty table
 
DC resistance standards and sources: high values. Fixed resistor, 1.00E+07 to 1.00E+14
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µ/: 6 to 2600
DCC, Modified Wheatstone bridge
Temperature: 23 °C
Relative humidity: 40 % or less
Voltage: 10 V to 500 V
Approved on 10 November 2014
Internal NMI service identifier: KRISS/2.1.3
Uncertainty table
 
DC resistance standards and sources: standards for high current. DC shunt, 1 m to 100 m
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µ/: 5 to 50
DCC bridge
Current: 1 A to 100 A
Approved on 10 November 2014
Internal NMI service identifier: KRISS/2.1.4
Uncertainty table
 
DC resistance standards and sources: multiple ranges. Multifunction calibrator, 1 to 1.00E+08
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µ/: 10 to 41
Potentiometry transfer via multimeters
Approved on 10 November 2014
Internal NMI service identifier: KRISS/2.1.5
Uncertainty table
 
DC resistance meters: low values. Microhmmeters, resistance, 0.001 to 1
Relative expanded uncertainty (k = 2, level of confidence 95 %) in m/: 0.1 to 0.2
Direct calibration
Approved on 10 November 2014
Internal NMI service identifier: KRISS/2.2.1
Uncertainty table