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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)
High voltage and current ,
AC high current, current transformers: ratio error
:
1.00E-3 to 0.01
Current transformer
Absolute expanded uncertainty
:
3.2E-5 to 2.3E-4
Comparison with a reference current transformer
Primary current : 1 A to 2000 A
Frequency : 50 Hz
Approved on 09 March 2015
Institute service identifier : GEOSTM/EM-27
CMC ID :
EURAMET-EM-GE-00000OL2-1
High voltage and current ,
AC high voltage transformer: phase displacement
:
0 rad to 0.1 rad
Voltage transformer
Absolute expanded uncertainty
:
5.0E-5 rad to 2.0E-2 rad
Current comparison with current comparator and two capacitors
Primary voltage : 500 V to 70 kV
Frequency : 50 Hz
Approved on 09 March 2015
Institute service identifier : GEOSTM/EM-26
CMC ID :
EURAMET-EM-GE-00000OL1-1
DC resistance ,
DC resistance standards and sources: low values
:
1 Ω
Resistance standard
Absolute expanded uncertainty
:
2.0E-5 Ω
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
CMC ID :
EURAMET-EM-GE-00000OKS-1
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
CMC ID :
EURAMET-M-GE-00000OLC-1
Mass ,
Mass
:
1 mg to 100 mg
Mass standard
Absolute expanded uncertainty
:
3 µg to 5 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-1
CMC ID :
EURAMET-M-GE-00000OLB-1
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
CMC ID :
EURAMET-T-GE-00000OLP-1
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
CMC ID :
EURAMET-T-GE-00000OM4-1
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
CMC ID :
EURAMET-T-GE-00000OLM-1
Mass ,
Mass
:
0.1 kg to 1 kg
Mass standard
Absolute expanded uncertainty
:
5.0E1 µg to 5.0E2 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-5
CMC ID :
EURAMET-M-GE-00000OLF-1
Hygrometers ,
Humidity
:
30 %rh to 90 %rh
Hygrometer with impedance capacitive or resistive convertor
Absolute expanded uncertainty
:
2 %rh
Comparison method
23°C : in Climatic chamber
Approved on 05 July 2021
Institute service identifier : H-3
CMC ID :
EURAMET-T-GE-00000OLK-1
Pressure ,
Gauge pressure
:
0 Pa to 2.00E6 Pa
Pressure gauge
Absolute expanded uncertainty
:
6.3E2 Pa
Gas medium
Approved on 29 May 2020
Institute service identifier : MP-2
CMC ID :
EURAMET-M-GE-00000OLH-1
AC power ,
AC power and energy: three phase, active power
:
0.03 W to 8.64E4 W
Power meter, power converter, wattmeter, power comparator, power calibrator
Relative expanded uncertainty
:
1.5E2 µW/VA to 3.0E2 µW/VA
Uncertainty table
{"row_1": {"col_1":"Current", "col_2":"Power factor", "col_3":"60 V to 480 V"}, "row_2": {"col_1":"5 mA to 50 mA", "col_2":"1 ", "col_3":"200"}, "row_3": {"col_1":"-", "col_2":"0.5 i and 0.5 c", "col_3":"300"}, "row_4": {"col_1":">50 mA to10 A", "col_2":"1", "col_3":"150"}, "row_5": {"col_1":"-", "col_2":"0.5 i and 0.5 c", "col_3":"300"}, "row_6": {"col_1":">10 A to 120 A", "col_2":"1 ", "col_3":"200"}, "row_7": {"col_1":"-", "col_2":"0.5 i and 0.5 c", "col_3":"300"}}
Comparison
Frequency : 50 Hz to 60 Hz
Voltage : 60 V to 480 V
Current : 0.005 A to 120 A
Power factor : 0.5 i to 1 to 0.5 c
Approved on 28 March 2020
Institute service identifier : EM-37
CMC ID :
EURAMET-EM-GE-00000OKQ-1
DC voltage (up to 1100 V) ,
DC voltage meters: intermediate values
:
1.00E-3 V to 1100 V
DC voltage calibrator
Absolute expanded uncertainty
:
3.0E-6 V to 7.2E-3 V
Uncertainty table
{"row_1": {"col_1":"", "col_2":"Expanded uncertainty / (V)"}, "row_2": {"col_1":"0.01 V to 0.2 V", "col_2":"2E-06<em>U<\/em> + 3E-06"}, "row_3": {"col_1":"> 0.2 V to 2 V", "col_2":"3E-06<em>U<\/em> + 2E-06"}, "row_4": {"col_1":"> 2 V to 20 V", "col_2":"3.5E-06<em>U<\/em> + 6E-06"}, "row_5": {"col_1":"> 20 V to 200 V", "col_2":"6E-06<em>U<\/em> + 50E-06"}, "row_6": {"col_1":"> 200 V to 1000 V", "col_2":"6E-06<em>U<\/em> + 600E-06"}, "row_7": {"col_1":"0.02 V to 0.22 V ", "col_2":"2E-06<em>U<\/em> + 3E-06"}, "row_8": {"col_1":"> 0.22 V to 2.2 V", "col_2":"3E-06<em>U<\/em> + 2E-06"}, "row_9": {"col_1":"> 2.2 V to 22 V", "col_2":"3.5E-06<em>U<\/em> + 6E-06"}, "row_10": {"col_1":"> 22 V to 220 V", "col_2":"6E-06<em>U<\/em> + 50E-06"}, "row_11": {"col_1":"> 220 V to 1100 V", "col_2":"6E-06<em>U<\/em> + 600E-06"}}
2E-06U + 3E-06) to (6E-06U + 600E-06 with voltage U
The uncertainty is expressed in V
Direct measurement
Temperature : (23 ± 3) °C
Approved on 19 May 2015
Institute service identifier : GEOSTM/EM-8 to EM-12
CMC ID :
EURAMET-EM-GE-00000OL0-1
High voltage and current ,
AC high voltage transformer: ratio error
:
0 to 0.01
Voltage transformer
Absolute expanded uncertainty
:
1.0E-4 to 2.0E-3
Current comparison with current comparator and two capacitors
Primary voltage : 500 V to 70 kV
Frequency : 50 Hz
Approved on 09 March 2015
Institute service identifier : GEOSTM/EM-25
CMC ID :
EURAMET-EM-GE-00000OL4-1
Hygrometers ,
Humidity
:
30 %rh to 90 %rh
Mechanical hygrometer
Absolute expanded uncertainty
:
3 %rh
Comparison method
23°C : in Climatic chamber
Approved on 05 July 2021
Institute service identifier : H-1
CMC ID :
EURAMET-T-GE-00000OLI-1
Pressure ,
Absolute pressure
:
1.00E5 Pa to 7.00E6 Pa
Pressure gauge
Absolute expanded uncertainty
:
1.8E3 Pa
Gas medium
Approved on 15 August 2020
Institute service identifier : MP-1
CMC ID :
EURAMET-M-GE-00000OLG-1
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
CMC ID :
EURAMET-T-GE-00000OMA-1
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
CMC ID :
EURAMET-T-GE-00000OM9-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
80 °C to 200 °C
Digital thermometer IPRT
Absolute expanded uncertainty
:
0.2 K to 1.2 K
Comparison method
Thermostat : Oil
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-30
CMC ID :
EURAMET-T-GE-00000OLW-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
419.527 °C
Zinc cell
Absolute expanded uncertainty
:
2.7 mK
Direct comparison
Temperature-controlled furnace : 3-zone
Approved on 31 March 2020
Institute service identifier : GEOSTM/T-3
CMC ID :
EURAMET-T-GE-00000OLZ-1
