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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)
Serbia, DMDM (Directorate of Measures and Precious Metals)
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -40 °C to 20 °C
Liquid-in-glass thermometer resolution 0.1 °C
Absolute expanded uncertainty : 3.3E-2 °C
Calibration by comparison
Ethanol bath
Approved on 03 November 2009
Institute service identifier : DMDM/T06-4
Time interval , Time interval : 1.00E-9 s to 1 s
Delay source
Absolute expanded uncertainty : 0.2 ns
Time interval counter
Slewing rate : 0.5 V/ns
Approved on 10 March 2008
Institute service identifier : DMDM/TF-3.2.4
Mass , Conventional mass : 100 kg to 500 kg
Mass standard
Absolute expanded uncertainty : 0.5 g to 8 g
Comparison in air
Temperature : (20 to 24) °C with max ± 1.5 °C/h and max ± 2 °C/12 h
Relative humidity : 40 % to 60 % with max ± 10 % per 4 hours
Pressure : 995 hPa to 1020 hPa
Approved on 04 May 2010
Impedance (up to the MHz range) , Capacitance for dielectric capacitors : 0.01 nF to 1.00E4 nF
Fixed capacitor, switched capacitor, capacitance box
Relative expanded uncertainty : 0.59 mF/F to 8.1 mF/F
{"row_1":{"col_1":"","col_2":"20 Hz","col_3":"120 Hz","col_4":"1 kHz","col_5":"10 kHz","col_6":"100 kHz","col_7":"1 MHz","col_8":"2 MHz"},"row_2":{"col_1":"0.01 nF","col_2":"-","col_3":"-","col_4":"-","col_5":"-","col_6":"0.81","col_7":"0.72 to 0.81","col_8":"0.84"},"row_3":{"col_1":"0.1 nF","col_2":"-","col_3":"-","col_4":"-","col_5":"-","col_6":"0.62","col_7":"0.61 to 0.63","col_8":"0.71"},"row_4":{"col_1":"1 nF","col_2":"-","col_3":"-","col_4":"0.71 to 1.31","col_5":"-","col_6":"-","col_7":"0.59 to 0.69","col_8":"0.60 to 0.78"},"row_5":{"col_1":"100 nF","col_2":"-","col_3":"0.6","col_4":"-","col_5":"-","col_6":"0.69","col_7":"-","col_8":"-"},"row_6":{"col_1":"10000 nF","col_2":"3.06","col_3":"3.06","col_4":"3.1","col_5":"3.56","col_6":"8.07","col_7":"-","col_8":"-"}}
The expanded uncertainties given in this table are expressed in mF/F
LCR meter
Frequency : 20 Hz to 2 MHz
Approved on 06 August 2013
Institute service identifier : DMDM/109
AC current , AC current up to 100 A: sources : 1.00E-3 A to 2 A
Multifunction calibrator, transconductance amplifier
Absolute expanded uncertainty : 4.2E-4 mA to 2.3 mA
{"row_1":{"col_1":"","col_2":"10 Hz ","col_3":"20 Hz","col_4":"21 Hz to 45 Hz","col_5":"46 Hz to 400 Hz","col_6":"401 Hz to 1 kHz ","col_7":"1.1 kHz to 5 kHz","col_8":"5.1 kHz to 10 kHz"},"row_2":{"col_1":"1 mA","col_2":"0.00042","col_3":"0.00042","col_4":"0.00042","col_5":"0.00042","col_6":"0.00042","col_7":"0.00042","col_8":"0.00043"},"row_3":{"col_1":"10 mA","col_2":"0.012","col_3":"0.0032","col_4":"0.0020","col_5":"0.0020","col_6":"0.0020","col_7":"0.0020","col_8":"0.0020"},"row_4":{"col_1":"100 mA","col_2":"0.12","col_3":"0.029","col_4":"0.018","col_5":"0.018","col_6":"0.018","col_7":"0.018","col_8":"0.019"},"row_5":{"col_1":"200 mA","col_2":"0.23","col_3":"0.059","col_4":"0.037","col_5":"0.037","col_6":"0.037","col_7":"0.037","col_8":"0.037"},"row_6":{"col_1":"500 mA","col_2":"0.58","col_3":"0.15","col_4":"0.092","col_5":"0.092","col_6":"0.092","col_7":"0.092","col_8":"0.093"},"row_7":{"col_1":"1 A","col_2":"1.05","col_3":"0.26","col_4":"0.17","col_5":"0.17","col_6":"0.17","col_7":"0.17","col_8":"0.17"},"row_8":{"col_1":"2 A","col_2":"2.34","col_3":"0.59","col_4":"0.37","col_5":"0.37","col_6":"0.37","col_7":"0.37","col_8":"0.37"}}
The expanded uncertainty given in this table are expressed in mA
Voltage drop across current shunt
Frequency : 10 Hz to 10 kHz
Approved on 06 January 2015
Institute service identifier : DMDM/100
DC current (up to 100 A) , DC current sources: low values : 0.1 mA
Current generator, multifunction calibrator
Absolute expanded uncertainty : 1.3 nA
Voltage drop across standard resistor
Power dissipation of standard resistor : 0.1 mW
Approved on 06 August 2013
Institute service identifier : DMDM/78
Fluid flow , Volume of liquid : 5 L to 5000 L
Proving tanks
Relative expanded uncertainty : 3.0E-2 %
Volumetric
Liquid : water
Reference temperature : 20 °C
Approved on 17 November 2017
Institute service identifier : DMDM/RU-Z06
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS1P
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-2:1992
Frequency : 63 Hz to 3.15 kHz
Approved on 27 February 2014
Institute service identifier : DMDM/1.1
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -80 °C to -40 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 1.0E1 mK
Calibration by comparison
Halocarbon bath
Approved on 19 March 2012
Institute service identifier : DMDM/T02-4
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -80 °C to -40 °C
Liquid-in-glass thermometer resolution 0.1 °C
Absolute expanded uncertainty : 3.5E-2 °C
Calibration by comparison
Halocarbon bath
Approved on 19 March 2012
Institute service identifier : DMDM/T06-11
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS1P
Absolute expanded uncertainty : 9.0E-2 dB
IEC 61094-2:1992
Frequency : 4 kHz
Approved on 27 February 2014
Institute service identifier : DMDM/1.1
DC voltage (up to 1100 V) , DC voltage sources: single values : 1 V to 10 V
Standard cell, solid state voltage standard
Absolute expanded uncertainty : 0.45 µV to 1.0E1 µV
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / µV ","col_3":"Reference Stanard used in calibration"},"row_2":{"col_1":"1.018 V","col_2":"0.12","col_3":"Josephson Voltage Standard"},"row_3":{"col_1":"1 V","col_2":"0.12","col_3":"Josephson Voltage Standard"},"row_4":{"col_1":"10 V","col_2":"0.04","col_3":"Josephson Voltage Standard"},"row_5":{"col_1":"1.018 V","col_2":"0.45","col_3":"Group of standard cells and solid state voltage standards"},"row_6":{"col_1":"1 V","col_2":"1","col_3":"Group of standard cells and solid state voltage standards"},"row_7":{"col_1":"10 V","col_2":"1","col_3":"Group of standard cells and solid state voltage standards"}}
Difference measurement
Fixed voltage : 1.018 V, 1 V, 10 V
Approved on 06 August 2013
Institute service identifier : DMDM/1
Mass , Conventional mass : 1 mg to 100 mg
Mass standard
Absolute expanded uncertainty : 1.3 µg to 2 µg
Comparison in air
Temperature : (20 to 24) °C with max ± 0.3 °C/h and max ± 0.5 °C/12 h
Relative humidity : 40 % to 60 % with max ± 5 % per 4 hours
Pressure : 995 hPa to 1020 hPa
Approved on 04 May 2010
Fluid flow , Volume of liquid : 1 mL to 1.00E4 mL
Glassware equipment (Pipettes, flasks, burettes, cylinders)
Relative expanded uncertainty : 1.5E-2 %
Gravimetric
Liquid : water
Reference temperature : 20 °C
Approved on 17 November 2017
Institute service identifier : DMDM/RU-Z03
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS2P
Absolute expanded uncertainty : 0.15 dB
IEC 61094-2:1992
Frequency : 16 kHz
Approved on 27 February 2014
Institute service identifier : DMDM/1.2
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS2P
Absolute expanded uncertainty : 0.46 dB
IEC 61094-2:1992
Frequency : 25 kHz
Approved on 27 February 2014
Institute service identifier : DMDM/1.2
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 1.0E-13 Hz/Hz
Phase time measurement
Averaging time : 1 day
Approved on 10 March 2008
Institute service identifier : DMDM/TF-2.1.1b
Time scale difference , Time scale difference : -1 s to 1 s
Local clock vs UTC
Absolute expanded uncertainty : 2.0E1 ns
Comparison against post-processed UTC
Averaging time : 5 days
Pulse amplitude : 1 V to 5 V
Slewing rate : > 0.5 V/ns
Fractional part of modulo 1 second difference, integer part can be provided also
Approved on 10 March 2008
Institute service identifier : DMDM/TF-1.1.2b
Measurement microphones , Pressure sensitivity level
Measurement microphone type LS1P
Absolute expanded uncertainty : 0.14 dB
IEC 61094-2:1992
Frequency : 8 kHz
Approved on 27 February 2014
Institute service identifier : DMDM/1.1
Photometry , Luminous intensity : 1 cd to 1.00E4 cd
Tungsten lamp
Relative expanded uncertainty : 2 %
Photometric bench, reference lamps / photometer
Colour temperature : 2353 K, 2800 K and 2856 K
Approved on 30 September 2010

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