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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)
Greece, EIM (Hellenic Institute of Metrology)
Fluid flow ,
Volume of liquid
:
20 L to 400 L
Proving tanks
Relative expanded uncertainty
:
3.0E-3 % to 2.0E-2 %
Gravimetric
Liquid : water
Reference temperature : 20 °C or 15 °C
Approved on 10 November 2011
Institute service identifier : EIM/CAL-VOL-202, EIM/CAL-VOL-203
Fluid flow ,
Volume of liquid
:
10 mL to 5000 mL
Volumetric flasks
Relative expanded uncertainty
:
0.1 % to 1.5E-2 %
Gravimetric
Liquid : water
Reference temperature : 20 °C
Approved on 10 November 2011
Institute service identifier : EIM/CAL-VOL-101
Mass ,
Mass
:
1 mg to 100 mg
Mass standard
Absolute expanded uncertainty
:
0.6 µg to 1.5 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 18 November 2010
Mass ,
Mass
:
0.1 g to 1 g
Mass standard
Absolute expanded uncertainty
:
1.5 µg to 3 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 18 November 2010
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
1084.62 °C to 1200 °C
Temperature sensor with display unit
Absolute expanded uncertainty
:
1.5 °C
Comparison
Furnace : ceramic block
Approved on 03 November 2009
Institute service identifier : EIM_TEM_50
Hygrometers ,
Humidity
:
10 %rh to 95 %rh
Relative humidity sensors
Absolute expanded uncertainty
0.017h + 0.4 h humidity in %rh
The uncertainty is expressed in %rh
Comparison
Air temperature : 10 °C to 20 °C
Pressure : 1 atm
Approved on 05 May 2014
Institute service identifier : EIM_TEM_54
Hygrometers ,
Humidity
:
10 %rh to 95 %rh
Relative humidity sensors
Absolute expanded uncertainty
0.009h + 0.2 h humidity in %rh
The uncertainty is expressed in %rh
Comparison
Air temperature : 20 °C to 45 °C
Pressure : 1 atm
Approved on 05 May 2014
Institute service identifier : EIM_TEM_55
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
1084.62 °C
Pure-metal thermocouple (type Pt/Pd)
Absolute expanded uncertainty
:
0.2 °C
Fixed points
Heat pipe furnace
Approved on 03 November 2009
Institute service identifier : EIM_TEM_40
Items for defining ITS-90 ,
Temperature
:
0.01 °C
Long-stem SPRT
Absolute expanded uncertainty
:
0.3 mK
Calibration at water triple point
Temperature controlled bath
Approved on 20 January 2010
Institute service identifier : EIM_TEM_4
Items for defining ITS-90 ,
Temperature
:
419.527 °C
Long-stem SPRT
Absolute expanded uncertainty
:
1.9E-3 °C
Zn freezing point
3-zone furnace
Approved on 20 May 2010
Institute service identifier : EIM_TEM_8
Items for defining ITS-90 ,
Temperature
:
660.323 °C to 961.78 °C
Long-stem HTSPRT
Absolute expanded uncertainty
:
2.0E-2 °C
Fixed points: Al to Ag
Approved on 17 January 2013
Institute service identifier : EIM_TEM_18
AC voltage (up to the MHz range) ,
AC voltage up to 1100 V: sources
:
1.00E-3 V to 1000 V
Multifunction calibrator
Relative expanded uncertainty
:
2.6E1 µV/V to 2.6E3 µV/V
Uncertainty table
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Direct comparison
Frequency : 10 Hz to 1 MHz
Approved on 06 August 2013
Institute service identifier : 8.5
AC power ,
AC power and energy: three phase
:
0.2 W to 2.88E4 W
Power meter
Relative expanded uncertainty
:
7.0E1 µW (VA)-1 to 2.2E2 µW (VA)-1
Direct comparison
Voltage : 60 V to 480 V
Current : 5 mA to 20 A
Power factor : 1 to 0.25 inductive or capacitive
Frequency : 53 Hz
Uncertainties refer to minimum and maximum values depending on the power factor
Approved on 06 August 2013
Institute service identifier : 7.3
Fluid flow ,
Volume of liquid
:
20 L to 400 L
Proving tanks
Relative expanded uncertainty
:
1.0E-2 % to 3.0E-2 %
Volumetric
Liquid : water
Reference temperature : 20 °C or 15 °C
Approved on 10 November 2011
Institute service identifier : EIM/CAL-VOL-302, EIM/CAL-VOL-304
Fluid flow ,
Volume of liquid
:
400 L to 1000 L
Proving tanks
Relative expanded uncertainty
:
3.0E-2 %
Volumetric
Liquid : water
Reference temperature : 20 °C or 15 °C
Approved on 10 November 2011
Institute service identifier : EIM/CAL-VOL-304
Hygrometers ,
Humidity
:
-20 °C to 40 °C
Dew-point hygrometer
Absolute expanded uncertainty
:
5.0E-2 °C
Measurement against humidity generator
Continuous gas flow : 1 atm
Approved on 03 November 2009
Institute service identifier : EIM_TEM_52
Hygrometers ,
Humidity
:
-30 °C to -20 °C
Dew-point hygrometer
Absolute expanded uncertainty
:
0.1 °C
Measurement against humidity generator
Continuous gas flow : 1 atm
Approved on 03 November 2009
Institute service identifier : EIM_TEM_51
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
160 °C to 250 °C
PRT
Absolute expanded uncertainty
:
2.0E-2 °C
Comparison
Stirred liquid bath : oil
Approved on 03 November 2009
Institute service identifier : EIM_TEM_22
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
660.323 °C
Noble-metal alloys thermocouple (type S, R)
Absolute expanded uncertainty
:
0.3 °C
Fixed points
Heat pipe furnace
Approved on 03 November 2009
Institute service identifier : EIM_TEM_25
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
231.928 °C
Noble-metal alloys thermocouple (type S, R)
Absolute expanded uncertainty
:
0.3 °C
Fixed points
Furnace
Approved on 03 November 2009
Institute service identifier : EIM_TEM_23
