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Bulgaria, BIM (Bulgarian Institute of Metrology)
Complete CMCs in Length for Bulgaria (.PDF file)
Laser radiations. Frequency stabilized laser: vacuum wavelength, 633 nm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in fm: 0.05
Optical beat frequency
Approved on 22 March 2005
Internal NMI service identifier: BIM/1
 
Laser radiations. Frequency stabilized laser: absolute frequency, 474 THz
Absolute expanded uncertainty (k = 2, level of confidence 95%) in kHz: 34
Optical beat frequency
Approved on 22 March 2005
Internal NMI service identifier: BIM/1
 
Laser radiations. Frequency stabilized laser: vacuum wavelength, 633 nm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: (1E-09 )
Optical beat frequency
Approved on 22 March 2005
Internal NMI service identifier: BIM/2
 
Length instruments. 1D measuring machine: displacement L, 0 mm to 200 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.26, 4.1L], L in m
Length comparator with incremental line scale
Orientation: horizontal
Approved on 22 March 2005
Internal NMI service identifier: BIM/3
 
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[20, 0.3L], L in mm
Interferometry: exact fractions (Kr lamp, He lamp)
Orientation: vertical
Approved on 22 March 2005
Internal NMI service identifier: BIM/4
 
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[50, 0.5L], L in mm
Mechanical comparison
Orientation: vertical
Approved on 22 March 2005
Internal NMI service identifier: BIM/5
 
End standards. Long gauge block: central length L, 100 mm to 1000 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[100, 1L], L in mm
Mechanical comparison
Orientation: horizontal
Approved on 22 March 2005
Internal NMI service identifier: BIM/7
 
Line standards. Line scale: line spacing L, 1 mm to 1000 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[60, 0.24L], L in mm
Fringe counting interferometer and microscope
Approved on 22 March 2005
Internal NMI service identifier: BIM/8
 
Line standards. (surveyor, engineer) tape: line spacing L, 0 m to 20 m
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.34, 3L], L in m
Interferometry
Approved on 22 March 2005
Internal NMI service identifier: BIM/9
 
Angle by circle dividers. Optical polygons: face angle, 10 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 1
Index table and autocollimator
Number of faces: 3 to 36
Approved on 02 August 2013
Internal NMI service identifier: BIM/10
 
Angle by circle-dividers. Indexing tables: index angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 0.7
Optical polygon and autocollimator
Approved on 02 August 2013
Internal NMI service identifier: BIM/11
 
Angle instruments. Autocollimator: error of indicated angle, 0 " to ±1200 "
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 0.5
Small angle generator
Approved on 02 August 2013
Internal NMI service identifier: BIM/12
 
Angle instruments. Electronic level: error of indicated inclination angle, 0 " to ±1200 "
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 1.5
Small angle generator
Approved on 02 August 2013
Internal NMI service identifier: BIM/13
 
Angle instruments. Bubble level: error of indicated inclination angle, 0 " to ±1200 "
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 2.5
Small angle generator
Approved on 02 August 2013
Internal NMI service identifier: BIM/14
 
Angle by circle dividers. Rotary table, heads and goniometers: angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 4
Optical polygon and autocollimator
Approved on 02 August 2013
Internal NMI service identifier: BIM/15
 
Angle instruments. Clinometers, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 6
Optical dividing head
Approved on 02 August 2013
Internal NMI service identifier: BIM/16
 
Angle artefacts. Angle blocks: included angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 5
Goniometer
Approved on 02 August 2013
Internal NMI service identifier: BIM/17
 
Angle instruments. Bevel protractor, 0 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ': 5
Angle blocks
Approved on 02 August 2013
Internal NMI service identifier: BIM/18
 
End standard. Length bar (long gauge block): central length L, 100 mm to 1000 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[150, 0.82L], L in mm
Interferometry, fringe counting and white light
Orientation: horizontal
Approved on 12 September 2016
Internal NMI service identifier: BIM/6
 
Radiance factor. General material, 0.9 to 0.99
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.004
Comparison with reference materials for radiance factor
Wavelength: 380 nm to 780 nm
Bandwidth: 1 nm to 3 nm
Geometry: d/0