User's Guide

36
XII. ANNEX 1: error according to installation angles
The accuracy of the installation is very important and can affect the quality of the data. The
following diagram shows the effect of the installation angles on the error margin of the speed
measurement:
Graphic 5: % error on speed as a function of a change in inclination angle
Graphic 6: % error in speed as a function of a change in transmission angle
0
5
10
15
20
25
-10 -8 -6 -4 -2 0 2 4 6 8 10
Error (%)
Tilt angle errors (in degree)
Error percentage on the measured speed
due to a wrong tilt angle
Angle 50°
Angle 30°
Angle 10°
Tilt angle (α)
-6°
5%
0
5
10
15
20
25
-10 -8 -6 -4 -2 0 2 4 6 8 10
Error (%)
Horizontal angle erros (in degree)
Error percentage on the measured speed
due to a wrong horizontal angle