ELP-362D Emergency Locator Beacon User`s Manual Download

Transcript
ELP-362D Emergency Locator Beacon
3
Internal Construction
The major internal components of the beacon include a printed circuit board
assembly, a urethane-encapsulated transducer assembly, and a battery. The
battery is contained in its own, separate, user accessible compartment.
Theory of Operation
The printed circuit board assembly generates all the necessary logic functions
to produce a pulse with the desired characteristics. The pulse is then
transformed from a CMOS level square wave to a much larger 37.5 kHz
sinusoidal pulse by a transformer. The output of the transformer drives the
urethane-encapsulated transducer, which propagates through the housing in
the form of a tuned 37.5 kHz acoustic signal.
Locating the Beacon
When the beacon is immersed in water, it will begin to radiate an acoustic
signal which can be received and transformed into an audible signal by either
the Teledyne Benthos, Inc. APR-272 or DPL-275A Acoustic Pinger
Receivers. When used in conjunction with the Teledyne Benthos, Inc. Model
DHA-151 Directional Hydrophone, either pinger receiver can be used as a
shipboard portable receiver to determine the general vicinity of the aircraft.
After the area is known, a diver can be deployed with the DPL-275A, which
will give the exact location of the aircraft. Other equivalent pinger receivers
may also be used.
Figure 1-4 Locating the Aircraft After Water Activation
User’s Manual
June 2011
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