Remove the Luminance Adaptor and position the light sensor base as desired to measure illuminance. This is accomplished by unscrewing the adaptor in a counter-clockwise direction. A switch is automatically released when the adaptor is removed instructing the system to make illuminance measurements reported in lux. Press and hold the AGLS activator button for several seconds. The lux value will appear in the display; when it stabilizes release the button to capture the value.
Note: when switching between modes, press Pause, change the adapter, then press Play.