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Calibration and Measurement Capabilities
Length
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
 
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Your selection : Length
 
Brazil, INMETRO (Instituto Nacional de Metrologia, Qualidade e Tecnologia)
Complete CMCs in Length for Brazil (.PDF file)
Angle by circle dividers. Index table: index angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ": 0.3
Error separation technique using an auxiliary rotary table, an optical polygon and an autocollimator
Index angle: in accordance with the number of faces of the optical polygon used
Approved on 24 May 2015
Internal NMI service identifier: INMETRO/8588
 
Angle by circle dividers. Optical polygon: face angle, 10 ° to 90 °
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ": 0.3
Error separation technique using an auxiliary rotary table, a precision indexing table and an autocollimator
Number of faces: 4 to 36 faces, with nominally equal integer angles between faces
Approved on 24 May 2015
Internal NMI service identifier: INMETRO/8580
 
CMM artefacts. Ball bar: ball spacing L, 10 mm to 450 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.32, 1E-03L], L in mm, values range from 0.34 µm to 0.55 µm
CMM and stylus, with gauge substitution
Approved on 24 May 2015
Internal NMI service identifier: INMETRO/34
 
Diameter standards. Ball or sphere: diameter, L, 5 mm to 200 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.22, 0.0012L], L in mm, range from 0.22 µm to 0.33 µm
CMM and laser with gauge substitution
Approved on 13 December 2010
Internal NMI service identifier: INMETRO/8557
 
Diameter standards. External cylinder (plug): diameter, L, 1 mm to 200 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.22, 0.0012L], L in mm, range from 0.22 µm to 0.33 µm
CMM and laser with gauge substitution
Approved on 13 December 2010
Internal NMI service identifier: INMETRO/8550
 
Diameter standards. Internal cylinder (ring): diameter, L, 1 mm to 200 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.22, 0.0012L], L in mm, range from 0.22 µm to 0.33 µm
CMM and laser with gauge substitution
Approved on 13 December 2010
Internal NMI service identifier: INMETRO/8546


 
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