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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 high voltage: ratio error. Voltage transformer, 0 to 0.002
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 35E-06 to 60E-06
Comparison with standard transformer
Voltage: 30 V to 33 kV
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.3.4a
Uncertainty table
 
AC high voltage: ratio error. Voltage transformer, 0 to 0.002
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 39E-06 to 48E-06
Comparison with standard transformer
Voltage: 55 kV to 200 kV
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.3.4b
Uncertainty table
 
DC voltage sources: low values. Multifunction calibrator, 1.00E-05 V to 10 V
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µV: 0.05 to 10
Comparison with resistively divided voltage
Approved on 10 November 2014
Internal NMI service identifier: KRISS/1.1.2
Uncertainty table
 
High AC current: ratio error. Current transformer, 0 to 0.002
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 26E-06 to 27E-06
Comparison with standard transformer
Current: 250 A to 20 kA
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.6.3c
Uncertainty table
 
High AC current: phase displacement. Current transformer, 0 min to 7 min
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in min: 0.09 to 0.10
Comparison with standard transformer
Current: 250 A to 20 kA
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.6.3d
Uncertainty table
 
AC high voltage: phase displacement. Voltage transformer, 0 min to 7 min
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in min: 0.14 to 0.29
Comparison with standard transformer
Voltage: 30 V to 33 kV
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.3.4c
Uncertainty table
 
AC high voltage: phase displacement. Voltage transformer, 0 min to 7 min
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in min: 0.15 to 0.16
Comparison with standard transformer
Voltage: 55 kV to 200 kV
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.3.4d
Uncertainty table
 
High AC current: ratio error. Current transformer, 0 to 0.002
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 28E-06 to 57E-06
Comparison with standard transformer
Current: 0.25 A to 5 kA
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.6.3a
Uncertainty table
 
High AC current: phase displacement. Current transformer, 0 min to 7 min
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in min: 0.10 to 0.76
Comparison with standard transformer
Current: 0.25 A to 5 kA
Frequency: 60 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/8.6.3b
Uncertainty table
 
Inductance: self inductance and equivalent series resistance. Fixed inductor, 1.00E-04 H to 10 H
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µH/H: 5 to 100
Comparison, Maxwell-Wien bridge
Frequency: 1 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/4.3.1
Uncertainty table
 
AC/DC voltage transfer: AC/DC difference at lower voltage. Thermal voltage converter, 0.1 V to 0.5 V
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 5 to 30
Comparison
Frequency: 20 Hz to 1 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/5.1.1
Uncertainty table
 
AC/DC voltage transfer: AC/DC difference at medium voltage. Thermal voltage converter, 0.5 V to 5 V
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 3 to 30
Comparison
Frequency: 20 Hz to 1 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/5.1.2
Uncertainty table
 
AC/DC voltage transfer: AC/DC difference at higher voltage. Thermal voltage converter plus range extenders, 5 V to 1000 V
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 5 to 50
Comparison
Frequency: 20 Hz to 1 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/5.1.3
Uncertainty table
 
AC voltage up to 1000 V: sources. Multifunction calibrator: AC voltage, 0.1 V to 1000 V
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µV/V: 40 to 335
AC/DC transfer
Frequency: 40 Hz to 1 MHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/5.2.1
Uncertainty table
 
AC voltage up to 1000 V: meters. AC voltmeter, multimeter, 0.1 V to 1000 V
Relative expanded uncertainty (k = 2, level of confidence 95%) in µV/V: 61 to 655
Direct measurement
Frequency: 40 Hz to 100 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/5.2.2
Uncertainty table
 
AC/DC current transfer: AC/DC transfer difference. Thermal converter with shunt, 0.005 A to 10 A
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µA/A: 10 to 90
Comparison
Frequency: 40 Hz to 10 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/6.1.1
Uncertainty table
 
AC current up to 100 A: sources. Multifunction calibrator, transconductance amplifier, 0.001 A to 10 A
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µA/A: 70 to 220
Direct measurement
Frequency: 40 Hz to 10 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/6.2.1
Uncertainty table
 
AC current up to 100 A: meters. Multimeter: AC current, 0.001 A to 10 A
Relative expanded uncertainty (k = 2, level of confidence 95 %) in µA/A: 165 to 6500
Direct measurement
Frequency: 40 Hz to 10 kHz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/73
Uncertainty table
 
AC power and energy: single phase (frequency . Power meter, wattmeter, power converter, 1.5 W to 1.2E+04 W
Relative expanded uncertainty (k = 2, level of confidence 95%) in µW (VA)-1: 50 to 100
Direct comparison
Power factor: 0.25 to 1
Voltage: 60 V to 240 V
Frequency: 45 Hz to 65 Hz
Approved on 10 November 2014
Internal NMI service identifier: KRISS/7.1.1a
Uncertainty table
 
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