Abstract
On the basis of the law for illumination measurement, a method is described for calibrating luxmeters with large measurement ranges with a satisfactory degree of accuracy. The method involves measurement equipment normally used for calibration of luxmeters with small or medium measurement ranges by conventional techniques. The principle of the method consists of the use of two standard lamps. One lamp (attested) serves as a basis for the achievement of sufficiently accurate illuminance. The other is a light source having a constant, but not necessarily known, luminous intensity. This serves as an auxiliary source to produce high illuminance, allowing the calibration of luxmeters with large measurement ranges.
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