MEASURAND : Distance between the centre line position of the reference line and the centre line position of the measured line of the linescale
NOMINAL VALUES : 30 nominal values from 0.1 mm to 100 mm
TRANSFER STANDARDS : two linescales designated as "Scale A" and "Scale B"
Graphs of equivalence showing the degrees of equivalence relative to the respective key comparison reference values: Di and associated expanded uncertainty (k = 2) Ui, for the 30 nominal values
Click on the stamp to see the corresponding graph of equivalence
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MEASURAND : Distance between the centre line position of the reference line and the centre line position of the measured line of the linescale
NOMINAL VALUES : 30 nominal values from 0.1 mm to 100 mm
TRANSFER STANDARDS : two linescales designated as "Scale A" and "Scale B"
Tables giving the degrees of equivalence relative to the respective key comparison reference values, Di and associated expanded uncertainty (k = 2) Ui, for the 30 nominal values : Yellow background : laboratory having measured Scale A (Group 1) NPL and METAS are the linking laboratories between the two groups. The values retained for NPL and METAS are those taken at the end and at the beginning, respectively, of the circulation inside one group. Other measurements at NPL and METAS were used to assess the stability of the standards.
Pink background: laboratory having measured Scale B (Group 2)
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Length, Dimensional Metrology |
| Description | Linescales |
| Time of measurements | 2006 - 2008 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Distances between zero reference line and 30 marked lines, 0.1 mm to 100 mm nominal length |
| Transfer device | Two 100 mm quartz linescale |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EUROMET Project No 882 |
| Comments | Results published on 13 March 2012 Linescales |
| Pilot institute |
MIRS/UM-FS/LTM
MIRS/University of Maribor, Faculty for Mechanical Engineering/Laboratory for Production Management Slovenia |
| Contact person | Bojan Acko +38641388143 |
| Pilot laboratory | |
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| MIRS/UM-FS/LTM |
MIRS/University of Maribor, Faculty for Mechanical Engineering/Laboratory for Production Management, Slovenia, EURAMET |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| BIM |
Bulgarian Institute of Metrology, Bulgaria, EURAMET |
| CEM |
Centro Español de Metrologia, Spain, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| DMDM |
Directorate of Measures and Precious Metals, Serbia, EURAMET |
| EIM |
Hellenic Institute of Metrology, Greece, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INM |
National Institute of Metrology, Romania, EURAMET |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
| LATMB |
LNMC Metrology Bureau (LATMB), Latvia, EURAMET |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| MIKES |
VTT Technical Research Centre of Finland Ltd, Centre for Metrology/Mittatekniikan keskus, Finland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMC, A*STAR |
National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| NPLI |
CSIR National Physical Laboratory of India, India, APMP |
| NRC |
National Research Council, Canada, SIM |
| NSAI NML |
NSAI National Metrology Laboratory, Ireland, EURAMET |
| NSC IM |
National Scientific Centre "Institute of Metrology", Ukraine, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| VSL |
VSL, Netherlands, EURAMET |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
MEASURAND : Distance between the centre line position of the reference line and the centre line position of the measured line of the linescale
NOMINAL VALUES : 30 nominal values from 0.1 mm to 100 mm
TRANSFER STANDARDS : two linescales designated as "Scale A" and "Scale B"
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For each nominal value and for each linescale, the reference value, xR, and its combined standard uncertainty, uR, are obtained from the weighted mean of the participant results with outliers excluded, as explained in Chapter 7 of the Final Report (The list of laboratories excluded from the calculation of the reference values is given in Table 11 on page 34 of the same Final Report).
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| For each nominal value, the degree of equivalence of laboratory i with respect to the reference value is given by a pair of terms: Di = xi - xR and Ui, its expanded uncertainty (k = 2). |
| Pair-wise degrees of equivalence are not computed for this key comparison. |
MEASURAND : Distance between the centre line position of the reference line and the centre line position of the measured line of the linescale
NOMINAL VALUES : 30 nominal values from 0.1 mm to 100 mm
TRANSFER STANDARDS : two linescales designated as "Scale A" and "Scale B"
Individual laboratory measurements are given here.
Yellow background : laboratory having measured Scale A (Group 1)
Pink background: laboratory having measured Scale B (Group 2)
NPL and METAS are the linking laboratories between the two groups. The values retained for NPL and METAS are those taken at the end and at the beginning, respectively, of the circulation inside one group. Other measurements at NPL and METAS were used to assess the stability of the standards.
