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Bulgaria, BIM (Bulgarian Institute of Metrology)
Complete CMCs in Photometry and Radiometry for Bulgaria (.PDF file)
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
 
Luminous intensity. Tungsten lamps, 10 cd to 1000 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.5
Standard lamps, substitution on photometric bench
Correlated color temperature: 2042 K to 3000 K
 
Luminous flux. Tungsten lamps, 10 lm to 2000 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.5
Goniophotometer
Correlated color temperature: 2600 K to 3000 K
 
Illuminance. Tungsten lamps, 10 lx to 2000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.3
Standard lamps on photometric bench
Correlated color temperature: 2042 K to 3000 K
 
Transmitance, regular, spectral. Spectrally-neutral material metal-on-quartz filters, 0.01 to 1
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1
Direct measuring with standard spectrophotometer
Wavelength: 250 nm to 700 nm
Bandwidth: 0.5 nm to 4 nm
 
Reflectance, diffuse, spectral. Spectrally-neutral material, 0.1 to 1
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.6
Comparison with standard reference materials for reflectance
Wavelength: 380 nm to 780 nm
Bandwidth: 1 nm to 3 nm
Geometry: d/0
 
Illuminance responsivity, tungsten source. Illuminance meter.Measurand unit, A/lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.3
Standard lamps and substitution with reference photometer on photometric bench
Correlated color temperature: 2800 K
Illuminance: 10 lx to 2000 lx
Approved on 20 April 2017
 
Pressure sensitivity level. Measurement microphone type LS1P. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.08
Pressure sequential comparison
Frequency: 63 Hz to 1 kHz
Approved on 18 October 2005
 
Pressure sensitivity level. Measurement microphone type LS1P. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.12
Pressure sequential comparison
Frequency: 1.25 kHz to 4 kHz
Approved on 18 October 2005
 
Pressure sensitivity level. Measurement microphone type LS1P. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.18
Pressure sequential comparison
Frequency: 5 kHz to 10 kHz
Approved on 18 October 2005
 
Pressure sensitivity level. Working standard microphone. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.14
Pressure sequential comparison
Frequency: 63 Hz to 4 kHz
Approved on 18 October 2005
 
Pressure sensitivity level. Working standard microphone. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.26
Pressure sequential comparison
Frequency: 5 kHz to 10 kHz
Approved on 18 October 2005
 
Free-field sensitivity level. Measurement microphone. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.3
Sequential comparison
Frequency: 63 Hz to 4 kHz
Approved on 18 October 2005
 
Free-field sensitivity level. Measurement microphone. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.5
Sequential comparison
Frequency: 5 kHz to 10 kHz
Approved on 18 October 2005
 
Sound pressure level. Sound calibrator single frequency 160 Hz to 1000 Hz, 70 dB (reference: 20 µPa) to 125 dB (reference: 20 µPa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.1
Calibrated measurement microphone
Microphone type: LS1P
Approved on 18 October 2005
 
Sound pressure level. Sound calibrator single frequency 160 Hz to 1000 Hz, 70 dB (reference: 20 µPa) to 125 dB (reference: 20 µPa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.15
Calibrated measurement microphone
Microphone type: WS2P
Approved on 18 October 2005
 
Sound pressure response level. Sound level meter, 94/124 dB (reference: 20 µPa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.2
Sound calibrator
Frequency: 1 kHz / 250 Hz
Approved on 18 October 2005
 
Free-field response level. Sound level meter. Measurand unit, dB (reference: true sound pressure)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.4
Sequential comparison
Frequency: 63 Hz to 4 kHz
Approved on 18 October 2005
 
Free-field response level. Sound level meter. Measurand unit, dB (reference: true sound pressure)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.7
Sequential comparison
Frequency: 5 kHz to 10 kHz
Approved on 18 October 2005
 
Charge sensitivity (shock, modulus). Accelerometer. Measurand unit, C/(m/s2)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.5
Comparison, ISO 16063-22
Peak value: 10 m/s2 to 2000 m/s2
Duration: 0.5 ms to 10 ms
Approved on 18 October 2005