Effective detection plane location uncertainty component in luxmeters calibration

Here we report on the estimation of the effective plane location uncertainty component in commercially available luxmeters calibration as performed at the Laboratorio de Fotometría of the Centro Nacional de Metrología of Mexico. The study was carried out by using a twelve luxmeters sample, comprising three of the most common detection heads shapes, and as a result we found 0.17 % as the highest uncertainty component value, which once combined to the typical luxmeters calibrations uncertainty budget, fully agree with the 1 % (k=2) illuminance Calibration and Measurement Capability declared by Mexico to the Bureau International des Poids et Mesures.âA