Calibration or s Laser raiations Stabilize laser of the mise en pratique: absolute frequency Optical beat frequency 633 633 24 khz 2 95% No 08010- Laser raiations Other stabilize laser: vacuum wavelength Optical beat frequency 633 633 1.0E-09 2 95% Yes 08010-10201 0.5 125 Material steel Q[28, 0.47L ], L in, s range from 28 to 65 0.5 125 Material ceramic Q[30, 0.39L ], L in, s range from 30 to 57 0.5 125 Material tungsten carbie Q[28, 0.22L ], L in, s range from 28 to 39 0.5 125 Material chromium carbie Q[28, 0.36L ], L in, s range from 28 to 53 0.5 125 Material steel, tungsten carbie an chromium carbie Q[50, 0.50L ], L in, s range from 50 to 1.2E+02 0.5 125 Material ceramic Q[70, 0.50L ], L in, s range from 70 to 1.4E+02 The BIPM key atabase, September 2017 1/5
Calibration or s 150 1000 Material steel Q[50, 0.80L ], L in, s range from 1.3E+02 to 8.5E+02, 10502, 10503 Step gauge: face spacing up to 1020 Step gauge size < 1020 Q[0.26, 1.4E-03L ], Caliper checker: face spacing up to 1020 Caliper checker size < 1020 Q[0.30, 2.7E-03L ], Line stanar Precision line scale: line spacing Line scale up to 250 Glass scale low coefficient of thermal expansion (8E-08 K -1 ) Q[41, 100.0E- 03L ], Line stanar Precision line scale: line spacing Line scale up to 1000 Glass scale working stanar Q[0.11, 2.9E-03L ], 0.1 1 0.24 D 1 100 Q[0.23, 1.4E- s range from 0.23 to 0.27 10502 D 100 300 Q[0.25, 1.4E- s range from 0.29 to 0.49 10503 The BIPM key atabase, September 2017 2/5
Calibration or s Internal cyliner (plain ring gauge): D an focusing microscope 0.1 100 Q[0.37, 1.3E- s range from 0.37 to 0.39 Angle by circle ivier Optical polygon: face angle Inexing table an one autocollimator, error separation 3 72 faces 0.2 " 2 95% No 10201, 10202, 10203, 10204 Angle by circle ivier Inexing table: inex angle Cross calibration versus polygon an autocollimator 360/n 360/n Measure angle: 360/n, number of ivision n 3, 4, 6, 8 an 12 0.2 " 2 95% No Angle instrument Autocollimator: error of inicate angle Sine arm an autocollimator -1000 1000 " 0.2 " 2 95% No Optical flat: flatness eviation over whole Fizeau, three flat test, automatic assessment 0 0.3 60 4 10201 Optical flat, optical parallel: flatness Fizeau, automatic assessment 0 0.3 60 20, 10102 Optical parallel: parallelism Gauge block comparator 0 20 60 40 The BIPM key atabase, September 2017 3/5
Calibration or s Rounness Glass hemisphere: rounness R Multi-step, styluson-spinle rounness instrument 0 20 Diameter 1 to 355 Q[7.7, 7.6R ], R in, s range from 7.7 to 1.6E+02 Rounness Internal an external cyliner, magnification stanar: rounness R Stylus-on-spinle rounness instrument 0 20 Diameter 1 to 355 Q[12, 12R ], R in, s range from 12 to 2.2E+02 10401 5436-1, type A), epth Stylus instrument 0.025 32 Groove epth, ISO 5436-1 Q[6.6, 12 ], in, s range from 6.6 to 3.8E+02 5436-1, type A), epth Interference microscope an stylus instrument (for premeasurement) 0.01 10 Groove epth ISO 5436-1 Q[2.4, 5.4 ], in Non-contact optical 5436-1, type A), epth profiler 0.3 50 Groove epth ISO 5436-1 Q[75, 7.3], in Roughness stanar, ISO 5436-1 type C, D: Ra (ISO 4287) Stylus instrument 0.025 32 Ra (ISO 4287) ISO 4287, ISO 4288, ISO 11562 Q[10, 12Ra ], Ra in, s range from 10 to 3.8E+02 10601 The BIPM key atabase, September 2017 4/5
Calibration or s Roughness stanar, ISO 5436-1 type C, D: Rz (ISO 4287) Stylus instrument 0.025 32 Rz (ISO 4287) ISO 4287, ISO 4288, ISO 11562 Q[18, 17Rz ], Rz in, s range from 18 to 5.4E+02 10601 CMM artefacts Ball plate: 2D center coorinates using swing roun metho up to 620 x 620 Ball plate size < 620 x 620 Q[0.27, 1.9E-03L ], 2-D, 3-D instruments CMM: error of inicate [size; location; shape] Comparison with gauge blocks up to 1200 x 1000 x 700 CMM size < 1200 x 1000 x 700 Q[0.52, 1.4E-03L ], 2-D, 3-D instruments CMM: error of inicate [size; location; shape] Comparison with step gauges up to 1200 x 1000 x 700 CMM size < 1200 x 1000 x 700 Q[0.52, 2.0E-03L ], The BIPM key atabase, September 2017 5/5