MEASURAND : Length of gauge blocks
TRAVELLING STANDARDS : 10 ceramic gauge blocks
Degrees of equivalence, Di and expanded uncertainty Ui, of each laboratory i with respect to the reference value for each gauge block, expressed in nm.
L = 0.5 mm
L = 1 mm
L = 1.01 mm
L = 1.1 mm
L = 6 mm
Note: DVMI-STAMEQ = 131 nm, UVMI-STAMEQ = 27 nm
L = 7 mm
Note: DVMI-STAMEQ = -132 nm, UVMI-STAMEQ = 30 nm
L = 8 mm
Note: DVMI-STAMEQ = -97 nm, UVMI-STAMEQ = 30 nm
L = 80 mm
Note: DVMI-STAMEQ = -408 nm, UVMI-STAMEQ = 39 nm
DNPLI = -691 nm, UNPLI = 86 nm
L = 90 mm
Note: DNML-SIRIM = 104 nm, UNML-SIRIM = 35 nm
DVMI-STAMEQ = 207 nm, UVMI-STAMEQ = 39 nm
DNPLI = 301 nm, UNPLI = 91 nm
L = 100 mm
Note: DNML-SIRIM = 136 nm, UNML-SIRIM = 37 nm
DVMI-STAMEQ = -198 nm, UVMI-STAMEQ = 41 nm
DNPLI = 255 nm, UNPLI = 96 nm
MEASURAND : Length of gauge blocks
TRAVELLING STANDARDS : 10 ceramic gauge blocks
Degrees of equivalence, Di and expanded uncertainty Ui, for each nominal length.
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Length, Dimensional Metrology |
| Description | Gauge blocks by interferometry |
| Time of measurements | 2001 - 2002 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Central length: 0.5 mm to 100 mm |
| Transfer device | Steel and tungsten carbide gauge blocks |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments |
The central length of gauge blocks is measured by interferometry according to ISO 3650.
APMP.L-K1 results published on 15 May 2006 Gauge blocks by interferometry (APMP.L-K1 and APMP.L-K1.1 graphs of equivalence for steel gauge blocks are shown side by side)
|
| Pilot institute |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | I. Fujima +81 298 61 4030 |
| Pilot laboratory | |
|---|---|
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| CMS/ITRI |
Industrial Technology Research Institute/Center for Measurement Standards, Chinese Taipei, APMP |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| MSL |
Measurement Standards Laboratory, New Zealand, APMP |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NML-SIRIM |
National Metrology Laboratory, SIRIM Berhad (became NMIM), Malaysia, APMP |
| NPLI |
CSIR National Physical Laboratory of India, India, APMP |
| SPRING Singapore |
Singapore Standards, Productivity and Innovation Board (became NMC, A*STAR in 2008), Singapore, APMP |
| VMI-STAMEQ |
Viet Nam Metrology Institute, Directorate for Standards and Quality, Viet Nam, APMP |
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 : Length of gauge blocks
TRAVELLING STANDARDS : 10 ceramic gauge blocks
|
For each nominal value, the APMP.L-K1 reference value, xR, is obtained as the weighted mean excluding outliers and MSL results (see Section 4 of the APMP.L-K1 Final Report). The standard uncertainty, uR, of xR is computed as the internal standard deviation of the weighted mean. |
| The degree of equivalence of each 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) with Ui = 2(ui2 - uR2 + uA2)1/2; uA is the uncertainty linked to the artefact. |
| No pair-wise degrees of equivalence are calculated. |
Results of key comparison APMP.L-K1 are not linked to any other key comparison results.
MEASURAND : Length of gauge blocks
TRAVELLING STANDARDS : 10 ceramic gauge blocks
xi : average of the central length measured in two orientations by laboratory i
ui : combined standard uncertainty of xi
CMS/ITRI was unable to participate due to instrument failure.
