Vaisala DSC111 Installation Manual - page 9
Table of Calculation Examples
a (feet)
b(feet)
c (feet)
W(width)
A(Angle)
15'-0"
15'-0"
21'-2"
0'-5"
45
15'-0"
20'-0"
25'-0"
0'-6"
37
15'-0"
26'-0"
30'-0"
0'-7"
30
20'-0"
15'-0"
25'-0"
0'-6"
53
20'-0"
20'-0"
28'-4"
0'-7"
45
20'-0"
25'-0"
32'-0"
0'-7.5"
39
20'-0"
30'-0"
36'-1"
0'-8.5"
34
20'-0"
40'-0"
44'-8"
0'-11"
45
25'-0"
15'-0"
32'-0"
0'-7.5"
51
25'-0"
25'-0"
35'-5"
0'-8.5"
45
30'-0"
39'-0"
49'-0"
1'-0"
37
W (width)
a
c
b
Target Area will have
a more elongated shape
with smaller angles A .
MAX Distance to Middle of Target: Feet
Target Width: At 33' (10 meters) the diameter is
approximately 7.9" (20 cm).
c = a + b = Distance to Middle of Target
Angle A = arcTangent a/b
2
2
a = Height
b = Horizontal Distance Above Target
c = Distance from DST111 or DSC111 to Target
Note: The minimum measuring distance for the DSC111 is
26' (8 meters), when the visibility option is enabled. At
shorter distances the road surface and traffic may affect the
visibility measurement.
A
DS111_pg7.dwg
REV
REVISIONS
PART / ITEM
SCALE:
6/15/10
NOTICE:
FILE NAME:
0
Initial Release
TS
CHANGE
DRAWN BY
SHEET
DWG. NO.
None
OF
7
7
DATE
ISSUE DATE
6/15/10
PI214719
Targeting Guidlines
THIS DRAWING AND THE INFORMATION IT
DISCLOSES IS THE EXCLUSIVE PROPERTY OF
VAISALA. ANY REPRODUCTION OR USE OF THIS
DRAWING IN WHOLE OR IN PART, WITHOUT THE
EXPRESS CONSENT OF VAISALA IS PROHIBITED.