MAINTENANCE
Honeywell &w&.
WARNING: HEATING AND RADIATION EFFECTS OF WEATHER RADAR CAN BE HAZARDOUS
TO LIFE. PERSONNEL SHOULD REMAIN AT A DISTANCE GREATER THAN
“R” FROM THE RADIATING ANTENNA IN ORDER TO BE OUTSIDE OF THE
ENVELOPE IN WHICH RADIATION EXPOSURE LEVELS EQUAL OR EXCEED 10
mW/cm2, 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, TO THE MAXIMUM PERMISSIBLE EXPOSURE LEVEL
BOUNDARY IS CALCULATED 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
INAC 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/cm2.
Honeywell Inc. recommends that operators follow the 5 mW/cm2 standard.
Figure 8-7 shows the MPEL
for the 24-inch antenna and PRIMUS@ 800 radar
power.
—
+2
RADIuS
R
\
\/
AIRCRAFTLUBBER LINE—-— —
~$)
/y -
270°
/
./
MPEL
BOUNDARY
PRIMUS@ 800 MPEL Boundary
Figure 8-7
DIAMETER
II
5 mW/CM2
OF FLAT-
RADIUS R
PLATE
OF MPEL
RADIATOR
BOUNDARY
AD-31304
22-14-00
Page 198.86
Aug 15/91
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