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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)
Lithuania, FTMC (Center for Physical Sciences and Technology)
DC voltage (up to 1100 V) ,
DC voltage sources: single values
:
1 V to 10 V
Solid state voltage standard
Relative expanded uncertainty
:
5.0E-2 µV/V to 0.3 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / (µV/V)","col_3":"Reference Standard used in calibration"},"row_2":{"col_1":"1 V","col_2":"0.06","col_3":"Josephson array voltage standard"},"row_3":{"col_1":"1.018 V","col_2":"0.06","col_3":"Josephson array voltage standard"},"row_4":{"col_1":"10 V","col_2":"0.05","col_3":"Josephson array voltage standard"},"row_5":{"col_1":"1 V","col_2":"0.3","col_3":"Solid state voltage standard"},"row_6":{"col_1":"1.018 V","col_2":"0.3","col_3":"Solid state voltage standard"},"row_7":{"col_1":"10 V","col_2":"0.3","col_3":"Solid state voltage standard"}}
Comparison
Fixed voltage : 1 V, 1.018 V, 10 V
Approved on 06 August 2013
Institute service identifier : FTMC/1
CMC ID :
EURAMET-EM-LT-000006U5-1
Items for defining ITS-90 ,
Temperature
:
232 °C to 419 °C
Long-stem Standard Platinum Resistance Thermometer (SPRT)
Absolute expanded uncertainty
:
4.0E-3 °C
Calibration at fixed points
Fixed points : H2O, Sn, Zn
Approved on 17 January 2013
CMC ID :
EURAMET-T-LT-00000BND-1
Items for defining ITS-90 ,
Temperature
:
29.7646 °C
Long-stem Standard Platinum Resistance Thermometer (SPRT)
Absolute expanded uncertainty
:
6.0E-4 °C
Calibration at gallium melting point
Temperature controlled bath
Approved on 20 May 2010
CMC ID :
EURAMET-T-LT-00000BN6-1
Items for defining ITS-90 ,
Temperature
:
660.323 °C
Long-stem Standard Platinum Resistance Thermometer (SPRT)
Absolute expanded uncertainty
:
6.0E-3 °C
Calibration at Aluminium freezing point
3-zone furnace
Approved on 20 May 2010
CMC ID :
EURAMET-T-LT-00000BN9-1
DC resistance ,
DC resistance standards and sources: intermediate values
:
10 kΩ to 1000 kΩ
Fixed resistor
Relative expanded uncertainty
:
0.3 µΩ/Ω to 0.6 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 Ω","col_2":"0.3"},"row_3":{"col_1":"100 Ω","col_2":"0.3"},"row_4":{"col_1":"1000 Ω","col_2":"0.4"},"row_5":{"col_1":"10 kΩ, 100 kΩ","col_2":"0.3"},"row_6":{"col_1":"1 MΩ","col_2":"0.6"},"row_7":{"col_1":"10 MΩ","col_2":"1.3"},"row_8":{"col_1":"100 MΩ","col_2":"2.2"},"row_9":{"col_1":"1 GΩ","col_2":"7.1"},"row_10":{"col_1":"10 GΩ","col_2":"120"},"row_11":{"col_1":"100 GΩ","col_2":"990"},"row_12":{"col_1":"1 TΩ","col_2":"9800"}}
Binary voltage divider bridge
Voltage : 5 V
Approved on 06 August 2013
Institute service identifier : FTMC/14
CMC ID :
EURAMET-EM-LT-000006U9-1
DC resistance ,
DC resistance standards and sources: low values
:
1 Ω
Fixed resistor
Relative expanded uncertainty
:
0.3 µΩ/Ω
Direct current comparator bridge
Power : 1 mW
Approved on 06 August 2013
Institute service identifier : FTMC/10
CMC ID :
EURAMET-EM-LT-000006U7-1
DC voltage (up to 1100 V) ,
DC voltage meters: intermediate values
:
0.1 V to 1000 V
DC voltmeter, multimeter, multifunction transfer standard
Relative expanded uncertainty
:
6.8 µV/V to 2.5 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"0.1 V","col_2":"6.8"},"row_3":{"col_1":"1 V","col_2":"3"},"row_4":{"col_1":"10 V","col_2":"1.4"},"row_5":{"col_1":"1000 V","col_2":"2.5"}}
Direct measurement
Approved on 06 August 2013
Institute service identifier : FTMC/37
CMC ID :
EURAMET-EM-LT-000006UB-1
DC resistance ,
DC resistance meters: low values
:
1 Ω
Micro-ohmmeter, multimeter, multifunction transfer standard, resistance bridge
Relative expanded uncertainty
:
2 µΩ/Ω
Comparison to standard resistor
Approved on 06 August 2013
Institute service identifier : FTMC/17
CMC ID :
EURAMET-EM-LT-000006UA-1
DC resistance ,
DC resistance standards and sources: multiple ranges
:
10 MΩ to 100 MΩ
Multifunction calibrator
Relative expanded uncertainty
:
3 µΩ/Ω to 6 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 MΩ","col_2":"3"},"row_3":{"col_1":"100 MΩ","col_2":"6"}}
Direct comparison
Approved on 06 August 2013
Institute service identifier : FTMC/32
CMC ID :
EURAMET-EM-LT-000006UG-1
Frequency ,
Frequency
:
5 MHz
Local frequency standard
Relative expanded uncertainty
:
2.0E-13 Hz/Hz
Phase time measurement
Averaging time : 1 day
Approved on 18 November 2009
Institute service identifier : FTMC/7
CMC ID :
EURAMET-TF-LT-00000B36-1
Time scale difference ,
Time scale difference
:
-1 s to 1 s
Local clock vs UTC(FTMC)
Absolute expanded uncertainty
:
2 ns
Time interval measurement
Pulse amplitude : > 1 V
Fractional part of modulo 1 second difference, integer part can be provided also
Approved on 18 November 2009
Institute service identifier : FTMC/1
CMC ID :
EURAMET-TF-LT-00000B2V-2
Frequency ,
Frequency
:
1 Hz to 2.00E8 Hz
Frequency counter
Absolute expanded uncertainty
2.5E-07 + 7E-12F F in Hz
The uncertainty is expressed in Hz
Direct measurement of frequency F
Averaging time : 1000 s
Approved on 18 November 2009
Institute service identifier : FTMC/12
CMC ID :
EURAMET-TF-LT-00000B2Y-1
DC resistance ,
DC resistance standards and sources: low values
:
0.1 Ω
Fixed resistor
Relative expanded uncertainty
:
0.5 µΩ/Ω
Direct current comparator bridge
Power : 2.5 mW
Approved on 06 August 2013
Institute service identifier : FTMC/9
CMC ID :
EURAMET-EM-LT-000006U6-1
DC voltage (up to 1100 V) ,
DC voltage sources: low values
:
0.1 V to 10 V
DC voltage source, multifunction calibrator
Relative expanded uncertainty
:
2.5 µV/V to 1 µV/V
Direct measurement
Approved on 06 August 2013
Institute service identifier : FTMC/40
CMC ID :
EURAMET-EM-LT-000006UC-1
DC resistance ,
DC resistance meters: intermediate values
:
1 MΩ to 1000 MΩ
Ohmmeter, multimeter, multifunction transfer standard, resistance bridge
Relative expanded uncertainty
:
2 µΩ/Ω to 9 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 MΩ","col_2":"2"},"row_3":{"col_1":"10 MΩ","col_2":"2"},"row_4":{"col_1":"100 MΩ","col_2":"4"},"row_5":{"col_1":"1 GΩ","col_2":"9"}}
Comparison to standard resistor
Approved on 06 August 2013
Institute service identifier : FTMC/21
CMC ID :
EURAMET-EM-LT-000006UI-1
DC voltage (up to 1100 V) ,
DC voltage sources: intermediate values
:
10 V to 1000 V
DC voltage source, multifunction calibrator
Relative expanded uncertainty
:
1 µV/V to 2 µV/V
Direct measurement
Approved on 06 August 2013
Institute service identifier : FTMC/41
CMC ID :
EURAMET-EM-LT-000006UD-1
Frequency ,
Frequency
:
1 Hz to 2.00E8 Hz
Rectangular pulse source
Relative expanded uncertainty
:
6.7E-12 Hz/Hz
Direct measurement of frequency
Averaging time : 1000 s
Slewing rate : > 0.5 V/ns
Approved on 18 November 2009
Institute service identifier : FTMC/13
CMC ID :
EURAMET-TF-LT-00000B3A-1
Frequency ,
Frequency
:
10 MHz
Local frequency standard
Relative expanded uncertainty
:
1.8E-12 Hz/Hz
Phase time measurement
Averaging time : 1000 s
Approved on 18 November 2009
Institute service identifier : FTMC/10
CMC ID :
EURAMET-TF-LT-00000B39-1
Frequency ,
Frequency
:
100 kHz
Local frequency standard
Relative expanded uncertainty
:
2.0E-13 Hz/Hz
Phase time measurement
Averaging time : 1 day
Approved on 18 November 2009
Institute service identifier : FTMC/3
CMC ID :
EURAMET-TF-LT-00000B32-1
Items for defining ITS-90 ,
Temperature
:
660 °C to 961 °C
High Temperature Standard Platinum Resistance Thermometer (HTSPRT)
Absolute expanded uncertainty
:
1.5E-2 °C
Calibration at fixed points
Fixed points : H2O, Al, Ag
Approved on 17 January 2013
CMC ID :
EURAMET-T-LT-00000BNF-1
