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India, NPLI (National Physical Laboratory of India)
Complete CMCs in Photometry and Radiometry for India (.PDF file)
Correlated colour temperature. Tungsten lamp, 2000 K to 3000 K
Absolute expanded uncertainty (k = 2, level of confidence 95%) in K: 20
Colorimeter
 
Luminous intensity. Tungsten lamp, 1 cd to 100 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 1.4, varies with measurand
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Luminous intensity. Tungsten lamp, 100 cd to 1000 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.4
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance responsivity, tungsten lamp. Illuminance meter. Measurand unit, nA/lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.4
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Luminous flux. Tungsten lamp, 1 lm to 100 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.0 to 1.8, varies with measurand
Integrating sphere, goniophotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminous flux. Tungsten lamp, 100 lm to 20000 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.8 to 1.9, varies with measurand
Integrating sphere, goniophotometer
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance. Tungsten lamp, 1 lx to 1000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6
Photometer
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance. Tungsten lamp, 1000 lx to 5000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 2.0, varies with measurand
Photometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 1 cd/m2 to 10 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.0 to 1.8, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 10 cd/m2 to 1000 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.8 to 1.6, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 1000 cd/m2 to 10000 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 2.0, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 6.0 to 1.9, varies with wavelength
Spectral irradiance comparator
Wavelength range: 280 nm to 400 nm
Bandwidth: 10 nm
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.9
Spectral irradiance comparator
Wavelength range: 400 nm to 800 nm
Bandwidth: 20 nm
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 3.3 to 5.2, varies with wavelength
Spectral irradiance comparator
Wavelength range: 800 nm to 2500 nm
Bandwidth: 50 nm
 
Angle instuments. Electronic level, 0 ' to ± 15 '
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ": 0.5 to 1.0
Tilting table and laser interferometer
Approved on 04 May 2011
Internal NMI service identifier: NPLI/17-6
 
Angle instuments. Clinometer, 0 º to 45 º
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ': 0.5
Tilting table and laser interferometer
Approved on 04 May 2011
Internal NMI service identifier: NPLI/17-7
 
Angle instuments. Spirit (bubble) level, 0 ' to ± 1 '
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ": 1.0
Tilting table and laser interferometer
Approved on 04 May 2011
Internal NMI service identifier: NPLI/17-8
 
Angle instruments. Bevel protractor, 0 º to ± 90 º
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ': 5.0
Angle gauge blocks
Approved on 04 May 2011
Internal NMI service identifier: NPLI/17-9
 
Angle artefact. 90 degree square, engineers square, 90 º
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (1 + 1.6L), L in m
CMM
Diameter: up to 200 mm
Blade length: 1 m
Approved on 04 May 2011
Internal NMI service identifier: NPLI/17-10
 
Roundness standards. Internal cylinder, roundness, 0.01 µm to 100 µm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: 0.1 to 0.5
Stylus-on-spindle roundness instrument
Cylinder diameter: 20 mm to 150 mm
Approved on 04 May 2011
Internal NMI service identifier: NPLI/18