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)
Austria, BEV (Bundesamt für Eich- und Vermessungswesen)
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
On (stable) site
Absolute expanded uncertainty
:
1.0E-7 m/s2
Absolute measurement
Ambient temperature : (21 ± 5) °C
Approved on 21 October 2001
CMC ID :
EURAMET-M-AT-00000FHR-1
China, NIM (National Institute of Metrology)
Gravity ,
Gravity acceleration
:
9.80122 m/s2 to 9.80123 m/s2
Absolute gravimeter
Absolute expanded uncertainty
:
4.0E-8 m/s2
Key comparison reference site (with continuous monitoring of gravity)
Ambient Temperature : (20 ± 5) °C
Approved on 28 June 2024
CMC ID :
APMP-M-CN-00000P1P-1
Gravity ,
Gravity acceleration
:
9.75 m/s2 to 9.85 m/s2
Gravity on (stable) site
Absolute expanded uncertainty
:
1.0E-7 m/s2
Absolute measurement
Ambient Temperature : (23±10) ℃
Approved on 30 July 2024
CMC ID :
APMP-M-CN-00000P1Q-1
Czechia, VUGTK/RIGTC (Research Institute of Geodesy, Topography and Cartography)
Gravity ,
Gravity acceleration
:
9.8093 m/s2 to 9.80934 m/s2
Absolute gravimeter
Absolute expanded uncertainty
:
6.0E-8 m/s2
Comparison against a gravity value of a reference station
Ambient temperature : from 15 ºC to 30 ºC
Approved on 15 September 2020
Institute service identifier : VUGTK/PEC02
CMC ID :
EURAMET-M-CZ-00000LPL-1
Gravity ,
Gravity acceleration
:
9.75 m/s2 to 9.85 m/s2
Gravity on (stable) site
Absolute expanded uncertainty
:
4.4E-8 m/s2
Absolute measurement
Ambient temperature : from 15 ºC to 30 ºC
Approved on 15 September 2020
Institute service identifier : VUGTK/PEC01
CMC ID :
EURAMET-M-CZ-00000LPK-1
Finland, FGI (Finnish Geospatial Research Institute)
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
On (stable) site
Absolute expanded uncertainty
:
8.0E-8 m/s2
Free fall experiment
Ambient temperature : 21 °C ± 8 °C
Approved on 03 January 2007
CMC ID :
EURAMET-M-FI-000009FE-1
Italy, INRIM (Istituto Nazionale di Ricerca Metrologica)
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
Gravity on (stable) site
Absolute expanded uncertainty
:
1.1E-7 m/s2
Absolute measurement
Ambient temperature : 23 °C ± 10 °C
decrease in uncertainty from 1.5E-7 m/s2 to 1.1E-7 m/s2 supported by uncertainty budget and key comparison result
Approved on 28 September 2023
CMC ID :
EURAMET-M-IT-00000FZO-2
Korea, Republic of, KRISS (Korea Research Institute of Standards and Science)
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
Absolute gravimeter
Absolute expanded uncertainty
:
5.0E-8 m/s2
Absolute measurement
Approved on 29 August 2023
Institute service identifier : KRISS/CA05501
CMC ID :
APMP-M-KR-00000N6R-1
Mexico, CENAM (Centro Nacional de Metrologia)
Gravity ,
Acceleration of free fall
:
9.75 m/s2 to 9.85 m/s2
On (stable) site
Absolute expanded uncertainty
:
4.8E-8 m/s2
Free fall experiment
Ambient temperature : 15 °C to 30 °C
Approved on 01 April 2020
Institute service identifier : 720-L08-002-IM
CMC ID :
SIM-M-MX-00000JKK-1
Russian Federation, VNIIM (D.I. Mendeleyev Institute for Metrology, Rosstandart)
Viscosity ,
Viscosity
:
1.00E-3 mm2/s2 to 3.00E-3 mm2/s2
Capillary viscometers
Relative expanded uncertainty
:
0.1 %
Flow due to gravity
Temperature : 20 °C
Approved on 21 October 2001
Institute service identifier : VNIIM/1
CMC ID :
COOMET-M-RU-00000ACQ-1
Viscosity ,
Viscosity
:
0.01 mm2/s2 to 0.3 mm2/s2
Capillary viscometers
Relative expanded uncertainty
:
0.2 %
Flow due to gravity
Temperature : 20 °C
Approved on 21 October 2001
Institute service identifier : VNIIM/2
CMC ID :
COOMET-M-RU-00000ACR-1
Viscosity ,
Viscosity
:
1 mm2/s2 to 100 mm2/s2
Capillary viscometers
Relative expanded uncertainty
:
0.3 %
Flow due to gravity
Temperature : 20 °C
Approved on 21 October 2001
Institute service identifier : VNIIM/3
CMC ID :
COOMET-M-RU-00000ACS-1
Saudi Arabia, SASO-NMCC (National Measurement and Calibration Center - Saudi Standards, Metrology and Quality Organization)
Gravity ,
Gravitational acceleration
:
9.78 m/s2 to 9.83 m/s2
Absolute gravity
Absolute expanded uncertainty
:
4.8E-8 m/s2
Absolute gravity FG5-X
Approved on 08 February 2022
Institute service identifier : SASO-NMCC
CMC ID :
GULFMET-M-SA-00000LSJ-1
Sweden, RISE (Research Institutes of Sweden AB)
Acceleration measuring chain / accelerometer ,
Voltage sensitivity (modulus)
Acceleration measuring chain / Accelerometer
Relative expanded uncertainty
:
0.2 %
Earth´s gravity, ISO 16063-16
Frequency : 0 Hz
Approved on 06 December 2024
Institute service identifier : AUV-1732
CMC ID :
EURAMET-AUV-SE-00000PAR-1
Switzerland, METAS (Federal Institute of Metrology)
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
On (stable) site
Absolute expanded uncertainty
:
8.0E-8 m/s2
Absolute measurement
Ambient temperature : (20 ± 5) °C
Approved on 02 July 2008
CMC ID :
EURAMET-M-CH-00000CHG-1
Thailand, NIMT (National Institute of Metrology (Thailand))
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
Gravity on (stable) site
Absolute expanded uncertainty
:
1.0E-7 m/s2
Absolute gravity FG5-X
Ambient temperature : 15 °C to 30 °C
Approved on 28 June 2024
Institute service identifier : 10060-30101
CMC ID :
APMP-M-TH-00000PCE-1
Gravity ,
Gravitational acceleration
:
9.75 m/s2 to 9.85 m/s2
Absolute gravity
Absolute expanded uncertainty
:
1.8E-6 m/s2
Comparison against a gravity value of a reference station
Ambient temperature : 15 °C to 30 °C
Approved on 28 June 2024
Institute service identifier : 10060-30102
CMC ID :
APMP-M-TH-00000PCF-1
Türkiye, UME (TÜBITAK Ulusal Metroloji Enstitüsü)
Gravity ,
Gravity acceleration
:
9.75 m/s2 to 9.85 m/s2
Gravity on stable site
Absolute expanded uncertainty
:
4.0E-8 m/s2
Absolute measurement
Ambient temperature : from 15 ºC to 30 ºC
Ambient temperature : from 15 ºC to 30 ºC
Approved on 02 February 2026
CMC ID :
EURAMET-M-TR-00000QWY-1
Ukraine, NSC IM (National Scientific Centre "Institute of Metrology")
Gravity ,
Gravity (free fall) acceleration
:
9.77 m/s2 to 9.85 m/s2
On (stable) site
Absolute expanded uncertainty
:
2.1E-7 m/s2
Absolute measurement
Ambient temperature : 14 °C to 34 °C
Approved on 21 June 2017
Institute service identifier : NSCIM-M-8.1.1/7
CMC ID :
EURAMET-M-UA-00000ORC-1
Ukraine, SE "Ukrmetrteststandard" (State Enterprise "Ukrmetrteststandard")
Viscosity ,
Kinematic viscosity
:
0.03 mm2/s2 to 5 mm2/s2
Capillary viscometers
Relative expanded uncertainty
:
0.5 %
Flow due to gravity
Temperature : 20 °C
Approved on 17 April 2015
Institute service identifier : UkrCSM 6.2
CMC ID :
EURAMET-M-UA-00000ORR-1
