Geophysical Survey Systems, Inc.
Model 5103A Antenna
System Settings and User Notes
Certificate
To Whom it may concern:
This is to certify that electromagnetic radiation emissions from transducers (antenna with
transmitting and receiving electronics) manufactured by Geophysical Survey Systems, Inc.
(GSSI) DO NOT constitute a safety or health hazard to operating personnel.
Emissions from GSSI transducers are below the 10mW/cm² (100W/m²) level specified by the
United States Occupational Safety and Health Administration (OSHA) regulations
Paragraph 1910.97 states:
"For normal environmental conditions and for incident electromagnetic frequencies from
100 MHz to 100 GHz, the radiation protection guide is
10 mW/cm² (milliwatt per square centimeter) as averaged over any possible 0.1 hour
period."
Emissions data using GPR SIR System-10, SIR-2, SIR-3, SIR-4, SIR-8, SIR-20, SIR-2000 and
SIR-3000 (at the standard Pulse Repetition Frequency of 100 KHz) with the antenna Models
listed and levels of Electromagnetic Radiation are specified herein:
Following is the average power density data at 5cm and wide band.
ANTENNA
(MHz)
AVERAGE POWER DENSITY
(W/m
2
@ 5 cm)
OSHA SPEC.
(W/m
2
)
100
Less than 0.0001
100
200
Less than 0.0001
100
300
Less than 0.0001
100
270
Less than 0.0001
100
400
Less than 0.0001
100
500
Less than 0.0001
100
900
Less than 0.0001
100
1000
Less than 0.0001
100
1600
Less than 0.0001
100
2600
Less than 0.0001
100
GEOPHYSICAL SURVEY SYSTEMS, INC.
Alan E. Schutz
Engineering Director
MN30-265 Rev -
