Comparison
Comparison close
Results
Comparison
Comparison close
Results
Comparison
Comparison close
RMO comparison
Linked comparison
EURAMET.L-S30
Metrology area, Sub-field Length, Dimensional Metrology
Description Determination of roundness in the equator of two alumina spheres
Time of measurements 2020
Status Measurements in progress
References

EURAMET.L-S30 Technical protocol (Draft A.4)

Measurand Roundness
Spheres with diameters of 20 mm and 25 mm
Parameters Peak-to-valley roundness deviation (RONt) with reference to the least squares reference circle (LSCI) and, if possible, to the minimum zone reference circles (MZCI), in accordance with ISO/TS 12181-1:2003
Transfer device Two alumina spheres
Comparison type Supplementary Comparison
Consultative Committee CCL (Consultative Committee for Length )
Conducted by EURAMET (European Association of National Metrology Institutes)
RMO Internal Identifier EURAMET 1489
Comments

This is a Supplementary Comparison continuation of the previous EURAMET.L-S23.2013 on which some difficulties linked to the quality of the sphere were found by some of the participants, being suggested to select better spherical standards and organize a new comparison.

Pilot institute CEM
Centro Español de Metrologia
Spain
Contact person Emilio PRIETO
eprieto@cem.es
+34 91 807 4716
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
CEM

Centro Español de Metrologia, Spain, EURAMET

DTI

Danish Technological Institute, Denmark, EURAMET

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

VSL

VSL, Netherlands, EURAMET

Comparison
Comparison close
Results
Comparison
Comparison close
Results