User's Manual

Geophysical Survey Systems, Inc. Model 3101A Series Antennas
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
GEOPHYSICAL SURVEY SYSTEMS, INC.
Alan E. Schutz
VP Technology