integrated metrology community.
MRA Appendix B
This page contains a collection of old key / supplementary comparison data. The content is not necessarily up-to-date anymore.
An officially maintained list of EURAMET TC-L comparisons with results can be found at the BIPM website.
CCL key comparisons (CCL-Kx)
First round of Key Comparisons, authorised by the CCL.
| Number | Subject | Status | Report |
|---|---|---|---|
| CCL-K1 | Gauge blocks | Complete | Final report |
| CCL-K2 | Long gauge blocks/length bars | Complete | Final report |
| CCL-K3 | Polygons | Complete | Final report |
| CCL-K4 | Ring & plug gauges | Complete | Final report |
| CCL-K5 | 1D CMM artefacts | Complete | Final report |
| CCL-K6 | 2D CMM artefacts | Complete | Final report |
Second round of Key Comparisons, authorised by the CCL.
(Not all future comparisons follow the classical scheme, some are operated as inter-RMO comparisons).
| Number | Subject | Status | Report |
|---|---|---|---|
| CCL-K1.2009 | Gauge blocks up to 500 mm | Planning | - |
CCL NANO pilot studies (NANOx)
Official pilot studies using MRA guidelines, authorised by the CCL.
| Number | Subject | Status | Report |
|---|---|---|---|
| NANO1 | Photomask linewidth | Starts soon | - |
| NANO2 (CCL-S2) | Step height | Complete | Final report |
| NANO3 (CCL-S3) | Linescales | Complete | Final report |
| NANO4 (CCL-S1) | 1D gratings | Complete | Final report |
| NANO5 (CCL-S4) | 2D gratings | Complete | Final report |
| NANO6 | SPM linewidth | Starts soon | - |
EURAMET key comparisons (EURAMET.L-Kx)
New key comparisons organized by EURAMET's TC Length and designed to link to corresponding CCL key comparisons.
| Number | Subject | Project No. | Status / Report |
|---|---|---|---|
| EUROMET.L-K1 | Gauge blocks | 471 | Final report |
| EUROMET.L-K1.1 | Gauge blocks | 634 | Final report |
| EUROMET.L-K1.2 | Gauge blocks | 1138 | Final report |
| EUROMET.L-K2 | Long gauge blocks | 602 | Final report |
| EURAMET.L-K1.2011 | Gauge blocks (up to 500 mm) | 1218 | Final report |
| EUROMET.L-K3.1 | Optical polygons | 870 | Final report |
| EUROMET.L-K3.2009 | Autocollimators | 1074 | Final report |
| EUROMET.L-K4.2005 | Ring & plug gauges | 812 | Final 1 Final 2 |
| EUROMET.L-K5-2004 | 1D CMM artefacts | 777 | Final report |
| EUROMET.L-K6 | 2D CMM artefacts | 743 | Final report |
| EUROMET.L-K7.2006 | Linescales (up to 100 mm) | 882 | Final Report Appendix (not approved) |
| EUROMET.L-K8 | Roughness | 1003 | Final report |
| EURAMET.L-K8.2013 | Key comparison on surface roughness standards | 1245 | Final report |
EURAMET supplementary comparisons (EURAMET.L-Sx)
Previous and new comparisons organized and reviewed by EURAMET TC-Length as being suitable for supporting the MRA.
| Number | Subject | Project No. | Status / Report |
|---|---|---|---|
| EUROMET.L-S1 | Linescales | 252 | BNM/LNE, 1995 |
| EUROMET.L-S2 | Thermal expansion of gauge blocks | 275 | Metrologia paper Final report |
| EUROMET.L-S3 | Depth setting standards | 301 | Final report |
| EUROMET.L-S4 | Wires (diameter) | 308 | Final report |
| EUROMET.L-S5a | Roundness | BCR | Final report |
| EUROMET.L-S5b | Roundness | 361 | Final report |
| EUROMET.L-S6 | Thermal expansion of long gauge blocks | 390 | PTB report |
| EUROMET.L-S7 | Surface plates | BCR | EUR 14059 EN, 1992 |
| EUROMET.L-S8 | Nd YAG lasers | Bilateral | Final report |
| EUROMET.L-S9 | Grid plates | BCR 3442 | 3442/1/0/189/91/7 |
| EUROMET.L-S10 | Squares | 570 | Final report |
| EUROMET.L-S11 | Surface texture | 600 | Metrologia paper Final report (6MB) |
| EUROMET.L-S12 | Gauge blocks by comparison | 601 | Final report |
| EUROMET.L-S13 | Cylindrical artefacts | 369 | Final report (PTB) |
| EUROMET.L-S14 | Steel tapes | 677 | Final report |
| EUROMET.L-S15 | Step height standards by SPM | 707 | Final report |
| EUROMET.L-S15a | Step height standards by SPM | 925 | Final report |
| EUROMET.L-S16 | Gauge blocks by comparison | 797 | Final report |
| EUROMET.L-S17 | Steel tape, trilateral (link to S14) | 875 | Final report |
| EUROMET.L-S18 | Granite square, bilateral (link to S10) | 905 | Final report |
| EUROMET.L-S19 | Steel cylindrical square, bilateral (link to S10) | 910 | Final report |
| EURAMET.L-S20 | Laser distance measuring instruments | 1169 | Final report |
| EURAMET.L-S21 | Thread pitch | 1223 | Final report |
| EURAMET.L-S22 | Gauge blocks by comparator | 1254 | Final report |
| EURAMET.L-S23 | Roundness by multi-step | 1269 | Final report |
| EURAMET.L-S25 | Comparison of pocket-type laser distance measurement instruments | 1354 | Final report |
| EURAMET.L-S26 | Measurement of groove depth standard in the range μm up to 1 mm | 1407 | Final report |
EURAMET/EUROMET bi-lateral comparisons
Bilateral comparisons, not necessarily registred to MRA KCDB.
| Number | Subject | Project No. | Status |
|---|---|---|---|
| None | Indexing tables | 725 | Final report |
Previous EUROMET key comparisons (EUROMET.L-Kx.PREV)
Existing Comparisons in the same subjects as the CCL-Kx series, reviewed by EUROMET Length as being suitable for the interim MRA.
| Number | Subject | Project No. | Report |
|---|---|---|---|
| EUROMET.L-K1.PREV | Gauge blocks | 229 | Final report |
| EUROMET.L-K2.PREV | Long gauge blocks/length bars | 254 | Final report |
| EUROMET.L-K3.PREV | Polygons | 371 | Final report (PTB) |
| EUROMET.L-K4.PREV | Ring & plug gauges | 384 | Final report |
| EUROMET.L-K5.PREV | Step gauge | 372 | Final report (PTB) |