System Outline - Furuno WR2120 Operator's Manual

SYSTEM OUTLINE

This system observes the strength of precipitation, the speed of rain clouds (Doppler speed), and observes
phenomena of rainfall.
70km
Notice:
1. Do not go around the antenna area.
2. While installing antenna on a rooftop of building in urban area, it must be installed in the safety area and
protected by a lightning rod(s) based on IEC 62305.
3. No obstacles should be around the antenna.
Safe distance:
- If H1 is taller than 2.0 meters, it is safe unless directly touching the antenna.
- If H1 is shorter than 2.0 meters, do not enter within a radius of 9.1 meters from the antenna.
(Refer to the Radio Frequency Radiation Hazard on page ii)
Notes:
1> It based on the standard human height of 2 meters.
2> It is safe to follow
e.g.: H (Height) = 2 m,
2
d (Distance between center of the antenna and human) =9.1m,
θ=3.5° (Minimum elevation is -2° + half beam width 1.5° )
- 0.6 + d・tanθ = 2 - 0.6 + 9.1・tan3.5° = 1.957 m < H
H
2
Therefore, H
this calculated value because it still has some extra safer margin.
- 0.6 + d・tan0
＞
H H
1 2
H
1
d
(Height of radar stand) = 2.0 m,
1
d
θ
H
2
1
v