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PRIMUS
r
880 Digital Weather Radar System
A28--1146--102--03
REV 3
6-1/(6-2 blank)
Maximum Permissible Exposure Level (MPEL)
6. Maximum Permissible Exposur e
Level (MPEL)
Heating and radiation effects of w eather r adar can be haz ardous to life.
Personnel should remain at a distance gr eater than R from the radiating
antenna in order to be outside of 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 W eather Radar. The radius, R, to the maximum permissible
exposure level boundary is c alculated for 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
advisory circular is reproduced without Appendix 1 in Appendix A of this
guide.
The American National Standards Institute (ANSI), in their document
ANSI C95.1--1982, recommends an exposure level of no more than
5mW/cm
2
.
Honeywell recommends that operators follow the 5 mW/cm
2
standard.
Figure 6--1 shows MPEL for both exposure levels.
MPEL Boundary
Figure 6--1