SMF/SCF-ALS

(Photometric Certification System for Airport Lighting Systems)

The Photometric Certification System for Airport Lighting Systems is an innovative procedure able to evaluate Approach Lighting Systems photometric performance, adopting a dedicated aiming device, based on cumulated evaluation of emitted illuminance of the lights, via a standard luxmeter.

The measurement procedure is based on the calculation of total illuminance produced by the luminous bar.

Before each measurement campaign the system sensor is checked performing a measure on a test light, in a dark room.

The procedure consists in the positioning of the measurement device on the straight line perpendicular to the bar and passing through its middle point. The distance between the measurement device and the bar is greater than the minimum requested to ensure the four beams overlap.

The measurement of the global illuminance value is performed maintaining the aiming system reference line aligned to the zero.