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methane
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Your query 'United Kingdom' produced 9 results New search

 
United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Photometry and Radiometry for United Kingdom (.PDF file)
Illuminance responsivity, tungsten source. Illuminance meter. Measurand unit, A/lx, V/lx, reading/lx
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.5 to 0.4, varies with illuminance
Photometric bench and reference lamps / photometer
Illuminance: 0.1 lx to 8 lx
Colour temperature: 2856 K
Approved on 20 April 2017
 
Illuminance responsivity, tungsten source. Illuminance meter. Measurand unit, A/lx, V/lx, reading/lx
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.4
Photometric bench and reference lamps / photometer
Illuminance: 8 lx to 500 lx
Colour temperature: 2856 K
Approved on 20 April 2017
 
Illuminance responsivity, tungsten source. Illuminance meter. Measurand unit, A/lx, V/lx, reading/lx
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.4 to 1.0, varies with illuminance
Photometric bench and reference lamps / photometer
Illuminance: 500 lx to 50000 lx
Colour temperature: 2856 K
Approved on 20 April 2017
 
Luminous flux. Tungsten lamp, 1 lm to 100 lm
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.7 to 0.6, varies with measurand
Integrating sphere or goniophotometer
Colour temperature: 2000 K to 3200 K
 
Luminous flux. Tungsten lamp, 100 lm to 20000 lm
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.6
Integrating sphere or goniophotometer
Colour temperature: 2000 K to 3200 K
 
Illuminance. Tungsten lamp, 0.1 lx to 50000 lx
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.5
Photometric bench and reference lamps / photometer
Correlated colour temperature: 2000 K to 3200 K
 
Luminance. Tungsten-based source, 1 cd/m2 to 20000 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 1.0
Telephotometer and reference lamp / calibrated diffuser combination
Correlated colour temperature: 2700 K to 3200 K
 
Luminance responsivity. Luminance meter. Measurand unit, A/(cd m-2), V/(cd m-2), reading/(cd m-2)
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 1.5
Reference lamp / diffuser combination
Luminance: 1E-04 cd/m2 to 1 cd/m2
Type of source used: tungsten reference lamp / diffuser combination
 
Luminance responsivity. Luminance meter. Measurand unit, A/(cd m-2), V/(cd m-2), reading/(cd m-2)
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 1.0
Reference lamp / diffuser combination
Luminance: 1 cd/m2 to 20000 cd/m2
Type of source used: tungsten reference lamp / diffuser combination
Other types of source can also be used