Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:1:p29
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 1 (pt 29/34)
Character Range: 214964–217964

Place the object at a defined distance from the camera. Measure the width of the object displayed on the monitor (b) in a situation without real sun light condition e.g. with a measurement microscope.

              1.3.2. Step 2: Calculate the object width () according to the following equation:
                     Where:

                  : width of the object displayed on the monitor (without smear) [minutes of arc]

                  b: width of the object displayed on the monitor (without smear) [mm]

                  r: viewing distance [mm]
              1.4. Data supplied by the instructions for use

              In the case of Classes V and VI camera monitor devices the instructions for use shall include a table that shows the minimum and maximum mounting height of the camera above ground under consideration of different viewing distances. The camera shall be mounted within the applicable height range. The viewing distances shall be selected from the intended context of use. The following table shows an example.

Viewing distance         0.5 m         1.0 m         1.5 m         2.0 m         2.5 m

Minimum mounting height  para. 1.4.1.  para. 1.4.1.  para. 1.4.1.  para. 1.4.1.  para. 1.4.1.

Maximum mounting height  para. 1.4.2.  para. 1.4.2.  para. 1.4.2.  para. 1.4.2.  para. 1.4.2.

1.4.1. The value of the minimum mounting height is the same for all viewing distances as it is independent of the viewing distance. It is determined by the dimensions of the field of vision and the field of view of the camera. Use the following working steps for determination of the minimum mounting height.
       1.4.1.1. Step 1: Draw the intended field of vision on ground.

              1.4.1.2  Step 2: Place the camera above the field of vision in such a way that the camera is viewing the field of vision. The lateral position shall be in accordance with the intended mounting position at the vehicle.

              1.4.1.3.  Step 3: Change the height of the camera above ground in such a way, that the field of vision displayed on the monitor covers an area at least as large as the field of vision. Furthermore, the field of vision display shall encompass the entire monitor screen.

              1.4.1.4. Step 4: Measure the height between camera and ground which is the minimum mounting height. Report the result value.

              1.4.2. The value of the maximum mounting height is different for different viewing distances as the displayed object size varies with the mounting height. Use the following working steps for determination of the maximum mounting height:

              1.4.2.1. Step 1: Determine the minimum width bmin of the critical object displayed on the monitor for each viewing distance.

           Where:

           r: viewing distance [mm]

                  bmin: minimum width of the critical object displayed on the monitor [mm]

              1.4.2.2. Step 2: Place the critical object inside the drawn intended field of vision in