Common use of Measuring procedure Clause in Contracts

Measuring procedure. Luminance measurements shall be made on a diffuse colourless surface with known diffuse reflection factor6. The diffuse colourless surface shall have the dimensions of the registration plate or the dimension exceeding one measuring point. Its centre shall be placed in the centre of the positions of the measuring points. This diffuse colourless surface(s) shall be placed in the position normally occupied by the registration plate and 2 mm in front of its holder. Luminance measurements shall be made perpendicularly to the surface of the diffuse colourless surface with the tolerance of 5° in each direction at the points shown in Annex 3 to this Regulation, each point representing a circular area of 25 mm in diameter. The measured luminance shall be corrected for the diffuse reflection factor 1.0.