Division 3.1.1

The geometry of test track shall be either a:

1. i..

   Circuit track (drivable in one direction (*)):

   with two measurement areas, one on each straight part, with maximum deviation of less than 20 degrees);

   (*)

   At least for the misalignment correction of the mobile anemometer (see 3.6) the test track has to be driven in both directions

   or

2. ii..

   Circuit or straight line track (drivable in both directions):

   with one measurement area (or two with the above named maximum deviation); two options: alternating driving direction after each test section; or after a selectable set of test sections e.g. ten times driving direction 1 followed by ten times driving direction 2.