Tube for illuminance measurement -IEC 60601-2-41-Figure 201.111
Standard:IEC 60601-2-41-Figure 201.111
Remaining illuminance with tube A tube with a diameter and a height defined in Figure 201 .1 1 0 is positioned around the detector of the illuminance meter at the LIGHT FIELD CENTRE . Its internal surface shall be matt black coated and textured to avoid stray reflections. An example of its internal
surface is shown in Figure 201 .1 1 1
Figure 201 .1 1 0 – Tube for illuminance measurement
Figure 201 .1 1 1 – Detail of the inner surface of the tube