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2. Connection diagram and national references
Advances in instrumentation, particularly in the field of 0-360° references, have profoundly altered the structure of the calibration chain.
In the 1980s-1990s, new references appeared that were able to position themselves continuously over one or more laps, with uncertainties of the order of a hundredth of a second, or a few thousandths.
In fact, it was no longer necessary to combine discretely positioned references on a lathe (as in the case of indexing tables) with interpolator systems based on sine methods (figure 1 ).
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Connection diagram and national references
Main equipment found in NMIs
Bibliography
Standards and norms
French Standards Association (AFNOR)
- Measuring instruments – Steel brackets. - NF E 11-103 - 1983
- Instruments de mesurage des angles. Généralités. - NF E 11-300 - 1986
- Instruments de mesurage des angles. Niveaux à bulle. - NF E 11-301 - 1984
- Instruments de mesurage des angles. Niveaux électroniques. - NF E 11-302 - 1984
- Instruments de mesurage des angles. Autocollimateurs. - NF...
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AG Davis – AA Gauge (divider plate)
http://www.agdavis-aagage.com/a_rotary_tables.htm
Brown and Sharp TESA (corner shims)
...
Websites
BIPM: Calibration and measurement capabilities: CMCs (Appendix C) http://kcdb.bipm.org/appendixC
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