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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Ukraine, NSC IM (National Scientific Centre "Institute of Metrology")
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 0 °C to 40 °C
Variable temperature blackbody
Absolute expanded uncertainty : 0.6 °C
Comparison using radiation thermometer and standard variable temperature blackbody
Wavelength : 8 µm to 14 µm
Aperture diameter : > or = 30 mm
Approved on 20 June 2014
Institute service identifier : NSC IM/NIL-11-53
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 231.928 °C
Thermocouple (type S and R)
Absolute expanded uncertainty : 0.2 °C
Calibration at tin fixed point
Temperature-controlled furnace : 3-zone
Uncertainty at the calibration point. Predetermined value of inhomogeneity included in the CMC entry
Approved on 23 September 2011
Institute service identifier : NSC IM/11
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 419.527 °C
Variable temperature blackbody
Absolute expanded uncertainty : 0.6 °C
Comparison using radiation thermometer and standard fixed-point (Zn) blackbody
Wavelength : 1.0 µm
Aperture diameter : > or = 5 mm
Approved on 20 June 2014
Institute service identifier : NSC IM/NIL-11-52
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 40 °C to 200 °C
Radiation thermometer
Absolute expanded uncertainty : 0.6 °C
Calibration against standard variable temperature blackbody
Wavelength : 8 µm to 14 µm
Target diameter : < or = 30 mm
Approved on 20 June 2014
Institute service identifier : NSC IM/NIL-11-58
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 0 °C to 40 °C
Radiation thermometer
Absolute expanded uncertainty : 0.6 °C
Calibration against standard variable temperature blackbody
Wavelength : 8 µm to 14 µm
Target diameter : < or = 30 mm
Approved on 20 June 2014
Institute service identifier : NSC IM/NIL-11-57
Items for defining ITS-90 , Temperature : 156.5985 °C
Long stem SPRT
Absolute expanded uncertainty : 1.1 mK
Calibration at indium fixed point
Temperature-controlled furnace : 1-zone
Approved on 23 September 2011
Institute service identifier : NSC IM/6
Items for defining ITS-90 , Temperature : 29.7646 °C
Long stem SPRT
Absolute expanded uncertainty : 0.5 mK
Calibration at gallium fixed point
Temperature-controlled furnace : 1-zone
Approved on 23 September 2011
Institute service identifier : NSC IM/5
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 660.323 °C to 1084.62 °C
Thermocouple (type B)
Absolute expanded uncertainty : 0.6 °C
Calibration at fixed points
Al, Cu : 3-zone
Approved on 15 November 2016
Institute service identifier : NSC IM/T
Items for defining ITS-90 , Temperature : 231.928 °C
Long stem SPRT
Absolute expanded uncertainty : 1 mK
Calibration at tin fixed point
Temperature-controlled furnace : 3-zone
Approved on 23 September 2011
Institute service identifier : NSC IM/7
Linear dimensions , Diameter standards : 3 mm to 100 mm
Internal cylinder (ring): diameter L
Absolute expanded uncertainty
Q[0.02, 0.5E-03L]

L in mm

The uncertainty is expressed in µm

Interferometry exact fractions
Ring's material : only transparent
Form and size of rings : 20 mm x 20 mm x 8 mm to 150 mm x 150 mm x 60 mm
Approved on 10 January 2005
Institute service identifier : NSC IM/13
Various dimensional , Long distance : 24 m to 5000 m
Geodetic baseline: interval distances L
Absolute expanded uncertainty
Q[0.15, E-03L]

L in m

The uncertainty is expressed in mm

Comparison to precision rangefinder
Distance : above 1000 m
Approved on 10 January 2005
Institute service identifier : NSC IM/25
DC resistance , DC resistance standards and sources: intermediate values : 1 Ω to 1.00E6 Ω
Fixed resistor
Relative expanded uncertainty : 2.0E2 nΩ/Ω to 1.6E3 nΩ/Ω
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 Ω","col_2":"200 nΩ/Ω"},"row_3":{"col_1":"1E+01 Ω","col_2":"224 nΩ/Ω"},"row_4":{"col_1":"1E+02 Ω","col_2":"400 nΩ/Ω"},"row_5":{"col_1":"1E+03 Ω","col_2":"565 nΩ/Ω"},"row_6":{"col_1":"1E+04 Ω","col_2":"692 nΩ/Ω"},"row_7":{"col_1":"1E+05 Ω","col_2":"800 nΩ/Ω"},"row_8":{"col_1":"1E+06 Ω","col_2":"1600 nΩ/Ω"}}
The expanded uncertainties given in this table are expressed in nΩ/Ω
Bridge by substitution, Hamon transfer
Temperature : 19.5 °C to 20.5 °C
Approved on 28 April 2010
Institute service identifier : NSC "Institute of Metrology"/5
Radio frequency measurements , Radio frequency power: calibration factor and effective efficiency on coaxials : 0.8 to 1
Thermistor, barretter
Relative expanded uncertainty : 1.1E-2 W/W
Direct comparison, comparison with comparator
Frequency : 0.03 GHz to 18.0 GHz
Connector type : III GOST R13317
Approved on 28 April 2010
Institute service identifier : NSC "Institute of Metrology"/9
Radio frequency measurements , RF voltage and current: RF-DC difference : 0.1 V to 3 V
Thermal voltage converter
Relative expanded uncertainty : 4 mV/V to 1.6E1 mV/V
Comparison with reference
Frequency : 600 MHz to 1000 MHz
Approved on 28 April 2010
Institute service identifier : NSC "Institute of Metrology"/21
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 231.928 °C
Digital thermometer thermocouple
Absolute expanded uncertainty : 0.4 °C
Calibration at tin fixed point
Temperature-controlled furnace : 3-zone
Uncertainty at the calibration point. Predetermined value of inhomogeneity included in the CMC entry
Approved on 23 September 2011
Institute service identifier : NSC IM/19
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 419.527 °C
Thermocouple Au/Pt
Absolute expanded uncertainty : 0.2 °C
Calibration at zinc fixed point
Temperature-controlled furnace : 3-zone
Uncertainty at the calibration point. Predetermined value of inhomogeneity included in the CMC entry
Approved on 23 September 2011
Institute service identifier : NSC IM/16
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 231.928 °C
Thermocouple Au/Pt
Absolute expanded uncertainty : 0.2 °C
Calibration at tin fixed point
Temperature-controlled furnace : 3-zone
Uncertainty at the calibration point. Predetermined value of inhomogeneity included in the CMC entry
Approved on 23 September 2011
Institute service identifier : NSC IM/15
Photometry , Luminous flux : 1 lm to 500 lm
Tungsten lamp
Relative expanded uncertainty : 2 % to 1 %
Integrating sphere
Correlated colour temperature : 2000 K to 3200 K
Other types of source can be measured with higher uncertainties
Approved on 18 September 2017
Photometry , Luminous flux : 1 lm to 1000 lm
LED
Relative expanded uncertainty : 5 %
Integrating sphere
Peak wavelength : 590 nm to 670 nm (red)
Geometric measurement conditions : full
Approved on 18 September 2017
Complex geometry , Gear standards : 0.01 µm to 10 µm
Gear involute master: involute profile slope deviation (fHa), (fa)
Absolute expanded uncertainty : 0.5 µm
Special interferometer
Base circle diameter : 80 mm to 150 mm
Approved on 10 January 2005
Institute service identifier : NSC IM/23

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