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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)
Georgia, GEOSTM (Georgian National Agency for Standards and Metrology)
Mass ,
Mass
:
0.1 g to 1 g
Mass standard
Absolute expanded uncertainty
:
5 µg to 1.0E1 µg
Comparison in air
Temperature : 18 °C to 23 °C
Relative humidity : 40 % to 60 %
Approved on 31 March 2015
Institute service identifier : GEOSTM/M-2
Impedance (up to the MHz range) ,
Capacitance and dissipation factor for dielectric capacitors: dissipation factor
:
1.00E-4 to 0.01
Fixed capacitor, switched capacitor, capacitance box
Absolute expanded uncertainty
:
1.0E-4 to 6.0E-4
Capacitance bridge with standard capacitors
Primary voltage : 100 V to 70 kV
Frequency : 50 Hz
Approved on 09 March 2015
Institute service identifier : GEOSTM/EM-30
Impedance (up to the MHz range) ,
Capacitance and dissipation factor for dielectric capacitors: capacitance
:
1.00E-10 F to 1.00E-7 F
Fixed capacitor, switched capacitor, capacitance box
Relative expanded uncertainty
:
1.0E-2 %
Capacitance bridge with standard capacitors
Primary voltage : 100 V to 70 kV
Frequency : 50 Hz
Approved on 09 March 2015
Institute service identifier : GEOSTM/EM-29
DC resistance ,
DC resistance standards and sources: intermediate values
:
10 kΩ
Resistance standard
Absolute expanded uncertainty
5E-06R with resistance R
The uncertainty is expressed in Ω
Substitution with a DMM
Temperature : (23 ± 3) °C
Approved on 19 May 2015
Institute service identifier : GEOSTM/EM-14
Items for defining ITS-90 ,
Temperature
:
0.01 °C to 231.928 °C
Standard Platinum Resistance Thermometer
Absolute expanded uncertainty
:
0.3 mK to 2 mK
Calibration at fixed points
Temperature-controlled furnace : 3-zone
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-7
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
200 °C to 420 °C
Digital thermometer IPRT
Absolute expanded uncertainty
:
0.2 K to 1.5 K
Comparison method
Thermostat : Salt
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-31
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
231.928 °C
Tin cell
Absolute expanded uncertainty
:
1.6 mK
Direct comparison
Temperature-controlled furnace : 3-zone
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-2
Mass ,
Mass
:
10 g to 100 g
Mass standard
Absolute expanded uncertainty
:
2.0E1 µg to 5.0E1 µg
Comparison in air
Temperature : 18 °C to 23 °C
Relative humidity : 40 % to 60 %
Approved on 31 March 2015
Institute service identifier : GEOSTM/M-4
Mass ,
Mass
:
1 g to 10 g
Mass standard
Absolute expanded uncertainty
:
1.0E1 µg to 2.0E1 µg
Comparison in air
Temperature : 18 °C to 23 °C
Relative humidity : 40 % to 60 %
Approved on 31 March 2015
Institute service identifier : GEOSTM/M-3
DC resistance ,
DC resistance standards and sources: low values
:
1 Ω
Resistance standard
Absolute expanded uncertainty
20E-06R with resistance R
The uncertainty is expressed in Ω
Substitution with a DMM
Temperature : (23 ± 3) °C
Approved on 19 May 2015
Institute service identifier : GEOSTM/EM-13
Ionizing radiation
Ambient dose equivalent/rate
,
Protection level survey meter
: 1.20E-3 Sv/h to 0.048 Sv/h
Relative expanded uncertainty 4.7 %
Calibration against standard ionisation chamber by irradiation in a calibrated field, free in air
Cs-137, ISO-4037-1; ISO-4037-2;ISO-4037-3
Reference standard : Secondary standard ionization chamber
Source of traceability : IAEA
Approved on 06 May 2019
Institute service identifier : COO-RAD-GEOSTM-1002
Ionizing radiation
Kerma/rate
,
Protection level dosemeter and/or ionisation chamber
: 1.00E-3 Gy/h to 0.04 Gy/h
Relative expanded uncertainty 1.6 %
Calibration against standard ionisation chamber by irradiation in a calibrated field, free in air
Cs-137, ISO-4037-1; ISO-4037-2
Reference standard : Secondary standard ionization chamber
Source of traceability : IAEA
Approved on 06 May 2019
Institute service identifier : COO-RAD-GEOSTM-1001
Fluid flow ,
Volume of liquid
:
1 mL to 200 mL
Piston operated instruments (burettes, diluters dispensers)
Relative expanded uncertainty
:
3.0E-2 %
Gravimetric
Liquid : water
Reference temperature : 20 °C
Approved on 10 March 2021
Institute service identifier : M-9
Fluid flow ,
Volume of liquid
:
1 µL to 1.00E4 µL
Piston operated instruments (pipettes)
Relative expanded uncertainty
:
0.5 % to 0.1 %
Gravimetric
Liquid : water
Reference temperature : 20 °C
Approved on 02 October 2020
Institute service identifier : M-8
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
80 °C to 200 °C
Liquid-in-glass thermometer total immersion; 0.1; 0.2 °C graduation
Absolute expanded uncertainty
:
0.1 K
Comparison method
Thermostat : Oil
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-21
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
200 °C to 420 °C
Mercury-in-glass thermometer total immersion; 0.01 °C
Absolute expanded uncertainty
:
2.5E-2 K
Comparison method
Thermostat : Salt
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-19
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
80 °C to 200 °C
Mercury-in-glass thermometer total immersion; 0.01 °C
Absolute expanded uncertainty
:
2.0E-2 K
Comparison method
Thermostat : Oil
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-18
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
80 °C to 250 °C
Industrial Platinum Resistance Thermometer
Absolute expanded uncertainty
:
2.0E-2 K to 4.0E-2 K
Comparison method
Thermostat : Oil
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-11
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
0 °C
Mercury-in-glass total immersion 0.1 °C graduation
Absolute expanded uncertainty
:
5.0E-2 °C
Ice melting point
Thermostat : ice bath
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-13
Items for defining ITS-90 ,
Temperature
:
0.01 °C
Long-stem Standard Platinum Resistance Thermometer
Absolute expanded uncertainty
:
0.3 mK
Water triple point
Thermostat : ice bath
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-4
