PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
PRIMUS
â
660 Weather Radar System
B--12
MAXIMUM PERMISSIBLE EXPOSURE LEVEL (MPEL)
Heatingandradiationeffectsofweather radarcanbehazardoustolife.
Personnel should remain at a distance greater than R (shown in figure
B--6) from the radiating antenna in order to be outside the envelope in
which radiation exposure levels equal or exceed 10 mW/cm
2
, the limit
recommended in FAA Advisory Circular AC No. 20--68B, August 8,
1980, Subject: Recommended Radiation Safety Precautions for
Ground Operation of Airborne Weather Radar. The radius, R,
distance to the maximum permissible exposure level boundary is
calculatedfor the radar system on the basis of radiator diameter, rated
peak--power output, and duty cycle. The greater of the distances
calculated for either the far--field or near--field is based on the
recommendations outlined in AC No. 20--68B.
The American National Standards Institute, in their document ANSI
C95.1--1982, recommends an exposure level of no more than 5
mW/cm
2
.
Honeywell Inc. recommends that operators follow the 5 mW/cm
2
standard. Figure B--6 shows the MPEL for the 12--inch antenna and
PRIMUS
R
660 Weather Radar power.
2
MPEL Boundary
Figure B--6
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