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| | | Mexico, CENAM (Centro Nacional de Metrologia) | | | Complete CMCs in Length for Mexico (.PDF file)
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| End standards. Gauge block: central length L, 0.5 mm to 100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[19, 0.45L], L in mm, values range from 19 nm to 49 nm | | Interferometry, exact fractions | | Material: steel | | Internal NMI service identifier: CENAM/8 |
| | | End standards. Gauge block: central length L, 0.5 mm to 100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[24, 0.42L], L in mm, values range from 24 nm to 49 nm | | Interferometry, exact fractions | | Material: ceramic | | Internal NMI service identifier: CENAM/8 |
| | | End standards. Gauge block: central length L, 0.5 mm to 100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[28, 0.33L], L in mm, values range from 28 nm to 44 nm | | Interferometry, exact fractions | | Material: tungsten carbide | | Internal NMI service identifier: CENAM/8 |
| | | End standards. Gauge block: central length L, 0.5 mm to 100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[28, 0.39L], L in mm, values range from 28 nm to 48 nm | | Interferometry, exact fractions | | Material: chrome carbide | | Internal NMI service identifier: CENAM/8 |
| | | End standards. Length bar (long gauge block): central length L, 100 mm to 300 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[19, 0.45L], L in mm, values range from 49 nm to 137 nm | | Interferometry, exact fractions | | Material: steel | | Internal NMI service identifier: CENAM/8b |
| | | End standards. Length bar (long gauge block): central length L, 100 mm to 300 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[24, 0.42L], L in mm, values range from 49 nm to 129 nm | | Interferometry, exact fractions | | Material: ceramic | | Internal NMI service identifier: CENAM/8b |
| | | End standards. Length bar (long gauge block): central length L, 100 mm to 300 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[28, 0.33L], L in mm, values range from 44 nm to 103 nm | | Interferometry, exact fractions | | Material: tungsten carbide | | Internal NMI service identifier: CENAM/8b |
| | | End standards. Length bar (long gauge block): central length L, 100 mm to 300 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[28, 0.39L], L in mm, values range from 48 nm to 121 nm | | Interferometry, exact fractions | | Material: chrome carbide | | Internal NMI service identifier: CENAM/8b |
| | | End standards. Gauge block: central length L, 0.5 mm to 100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[29, 0.94L], L in mm, values range from 29 nm to 99 nm | | Mechanical comparison to gauge block | | Material: steel | | Internal NMI service identifier: CENAM/9 |
| | | End standards. Length bar (long gauge block): central length L, 0.125 m to 0.25 m | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.18 + 0.7L), L in m, values range from 0.27 µm to 0.36 µm | | 1-D stylus comparator, gauge substitution | | Internal NMI service identifier: CENAM/10 |
| | | End standards. Step gauge: face spacing L, 0.02 m to 1.2 m | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.35 + 0.4L) | | CMM and laser interferometer | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/13 |
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