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Session:
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5B - Electro-Optics II
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Date & Time:
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Tuesday August 8, 2:30 PM - 4:00 PM
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Paper Title:
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Crosscheck On Realisation of Illuminance Scale Between NML-SIRIM & KRISS
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Speaker:
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Mr. Mohd Nizam Abdullah
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CoAuthors:
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Mohd Nizam Abdullah, Abdul Rashid Zainal Abidin, Md Nor Md Chik, Yong-Wan Kim, Seung-Nam Park
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Speaker Info
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Company:
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SIRIM
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Department:
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National Metrology Laboratory
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Address:
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Lot PT 4803 Bandar Baru
, Salak Tinggi Sepang, Selangor, Malaysia, 43900, United Kingdom
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Phone:
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603-87781644
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Fax:
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603-87781616
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Email:
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mnizam@sirim.my
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Abstract:
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We crosschecked illuminance realisations between NML-SIRM and KRISS. The illuminance scale of NML-SIRIM is traceable to NPL, UK, by annually calibrating photometers and luminous intensity lamps. To prepare an artefact for the crosscheck, at KRISS, we measured spectral responsivity of a photometer using a spectral responsivity comparator traceable to a cryogenic radiometer. The external aperture area of the photometer was measured using a two-axis translator with a microscope. Through this approach, preparation of artefacts is crucial in respective of spectral responsivity scale. Uncertainty of the artefact photometer is less than 0.5 % (k=2) in terms of illuminance responsivity. The setup and procedure for the crosscheck is described in detail.
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