3
Select the mounting height, attach and point at target
1
Determine the mounting height (between 17 and 40 feet is recommended; typical mounting height is
about 25 feet).
Height
Target
Distance
Offset (perpendicular)
Line
-of
-sight to target
X
Height (ft /
m
)
Off
set (
ft /
m
)
17
/ 5.2
20
/ 6.1
25
/ 7.6
30
/ 9.1
40
/ 12.2
0
/ 0
40
/ 12.2
45
/ 13.7
55
/ 16.8
60
/ 18.3
75
/ 22.9
5
/ 1.5
45
/ 13.7
45
/ 13.7
60
/ 18.3
65
/ 19.8
80
/ 24.4
10
/ 3
50
/ 15.2
50
/ 15.2
60
/ 18.3
65
/ 19.8
80
/ 24.4
15
/ 4.6
50
/ 15.2
55
/ 16.8
65
/ 19.8
70
/ 21.3
80
/ 24.4
20
/ 6.1
55
/ 16.8
55
/ 16.8
65
/ 19.8
75
/ 22.9
90
/ 27.4
25
/ 7.6
60
/ 18.3
65
/ 19.8
65
/ 19.8
75
/ 22.9
90
/ 27.4
30
/ 9.1
65
/ 19.8
70
/ 21.3
75
/ 22.9
80
/ 24.4
95
/ 28.9
35
/ 10.7
70
/ 21.3
75
/ 22.9
85
/ 25.9
85
/ 25.9
95
/ 28.9
40
/ 12.2
80
/ 24.4
90
/ 27.4
90
/ 27.4
95
/ 28.9
100
/ 30.4
45
/ 13.7
95
/ 28.9
100
/ 30.4
100
/ 30.4
100
/ 30.4
105
/ 32
50
/ 15.2
100
/ 30.4
100
/ 30.4
105
/ 32
110
/ 33.5
120
/ 36.6
4
Point sensor at target
1
Pan and tilt the mount (using swivel joints 1 and 2) so that the mount head
points to the target location in the center of the lanes of interest.
2
Attach the sensor to the mount making sure the sensor can still roll with
respect to the mount head.
3
Attach the viewfinder by centering the arched notch over the top-middle of
the sensor and inserting it into position.
4
With your eyes about one foot from the viewfinder (viewpoint 1), use the
visual cue tabs to look directly through the target crossbars. Tilt the sensor until the target location
lines up between the target crossbars.
1
2
Main Shaft
Mount Head
Line-of-sight to
upstream
detection area
5
Pan the sensor until the target location is centered between the
notches in the target crossbar. When you have the correct view
angle, the bottom center notch should also line
up with the bottom part of the long,
narrow alignment bar.
2
Strap the mount to the pole with the
mount’s main shaft pointed in the general
direction of the target. Target location is
determined by target distance table.
Note.
For a better view, close one eye and
move closer to the viewfinder. If there is
not enough headroom, you can use a digital
camera directly behind the viewfinder.
Framed archways
Target
crossbars
The framed archways (viewpoint 2) will be used in
the next step to verify the upstream detection area.
Line-of-sight
to target
2
1
