Applied Concepts Inc ACMI005 Benutzerhandbuch
S
Sport2 Owner’s Manual
ANGLE ERROR
The most common mistake made with all radar guns is trying to clock targets at angles.
All radar guns work on the Doppler principle and need to clock objects moving directly at or away
from the gun. Clocking at an angle with a stationary radar gun results in angle error, and the gun
displays a speed that is LOWER than the actual speed.
Cosine Angle Error Chart
0
Degrees
5
Degrees
10
Degrees
15
Degrees
30
Degrees
45
Degrees
90
Degrees
True
Speed
0%
Error
0.4%
Error
Error
1.5%
Error
Error
3.4%
Error
Error
13.4%
Error
29.3%
Error
100%
Error
25.0 mph
25.0 mph
24.9 mph
24.6 mph
24.1 mph
21.7 mph
17.7 mph
0 mph
50.0 mph
50.0 mph
49.8 mph
49.2 mph
48.3 mph
43.3 mph
35.4 mph
0 mph
75.0 mph
75.0 mph
74.7 mph
73.9 mph
72.4 mph
65.0 mph
53.0 mph
0 mph
100.0 mph
100.0 mph
99.6 mph
98.5 mph
96.6 mph
86.6 mph
70.7 mph
0 mph
125.0 mph
125.0 mph
124.5 mph
123.1 mph
120.7 mph
108.3 mph
88.4 mph
0 mph
150.0 mph
150.0 mph
149.4 mph
147.7 mph
144.9 mph
129.9 mph
106.1 mph
0 mph
200.0 mph
200.0 mph
199.2 mph
197.0 mph
193.2 mph
173.2 mph
141.4 mph
0 mph
250.0 mph
250.0 mph
249.0 mph
246.2 mph
241.4 mph
216.5 mph
176.8 mph
0 mph
Radar Gun Placement
To get accurate readings, the radar gun must be placed in the line of travel of the target.
At slight angles, the error is very small, however at larger angles, the error becomes substantial.
At slight angles, the error is very small, however at larger angles, the error becomes substantial.
Calculating Angle Errors
If you know the angle that you are clocking at, you can calculate the actual speed by taking the
radar reading and dividing by the cosine of the angle.
For example: if you are clocking at 30 degrees, and the gun displays 129.9 mph. Take 129.9 and
divide by the cosine of 30 degrees (0.866) to get a true speed of 150.0 mph.
radar reading and dividing by the cosine of the angle.
For example: if you are clocking at 30 degrees, and the gun displays 129.9 mph. Take 129.9 and
divide by the cosine of 30 degrees (0.866) to get a true speed of 150.0 mph.
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