MEASURAND : Central length of gauge blocks measured by interferometry according to ISO 3650
STEEL GAUGE BLOCKS
NOMINAL VALUES : 8 gauge blocks from 1 mm to 90 mm
Degrees of equivalence, Dik and expanded uncertainty Uik, of each laboratory i with respect to the reference value for each gauge block expressed in nm:
MEASURAND : Central length of gauge blocks measured by interferometry according to ISO 3650
STEEL GAUGE BLOCKS
NOMINAL VALUES : 8 gauge blocks from 1 mm to 90 mm
Degrees of equivalence, Dik and expanded uncertainty Uik, for each nominal length:
Results are available under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Length, Dimensional Metrology |
| Description | Gauge blocks by interferometry |
| Time of measurements | 2010 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Central length: 1 mm, 5 mm, 8 mm, 10 mm, 25 mm, 40 mm, 60 mm and 90 mm |
| Transfer device | Eight steel gauge blocks |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EURAMET Project No 1138 |
| Comments | Results published on 27 February 2012 Gauge blocks by interferometry |
| Pilot institute |
HMI/FSB-LPMD
now: FSB - LPMD, Faculty of Mechanical Engineering and naval architecture, Laboratory for precise measurement of length Croatia |
| Contact person | V. Mudronja +385 1 616 8327 |
| Pilot laboratory | |
|---|---|
| HMI/FSB-LPMD |
now: FSB - LPMD, Faculty of Mechanical Engineering and naval architecture, Laboratory for precise measurement of length, Croatia, EURAMET |
| DFM |
Danish Fundamental Metrology A/S, Denmark, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| MKEH |
Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET |
| NIS |
National Institute for Standards, Egypt, AFRIMETS |
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 : Central length of gauge blocks measured by interferometry according to ISO 3650
STEEL GAUGE BLOCKS
NOMINAL VALUES : 8 gauge blocks from 1 mm to 90 mm
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For each nominal value Lk, the reference value, xRk, is obtained from the weighted mean of the participant results xik with weigths based on the participants combined standard uncertainties, as explained in Chapter 8 of the Final Report. The corresponding standard uncertainty, uRk, is based on the internal standard deviation of the measurement results (see also in Chapter 8).
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| For each nominal value Lk, the degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms: Dik = xik - xRk, and Uik, its expanded uncertainty (k = 2), with Uik = 2[uik2 - uRk2]1/2. |
| Pair-wise degrees of equivalence are not computed for this key comparison. |
NIS results were not taken into account in the calculation of the key comparison reference values and the degrees of equivalence as they suspected that certain influence parameters (possibly temperature) were not accounted for in their measurements.
MEASURAND : Central length of gauge blocks measured by interferometry according to ISO 3650
STEEL GAUGE BLOCKS
NOMINAL VALUES : 8 gauge blocks from 1 mm to 90 mm
xik : result of measurement carried out by laboratory i for gauge block with nominal length Lk, expressed as the deviation from nominal length in nm
uik : combined standard uncertainty of xik reported by laboratory i
