5
4) Frequency of the pinger (the frequency of the individual pulses
within the 4 ms time frame shown above) is factory set for the
Single Frequency Pinger (SFP-1) at 22, 32, 40, or 50kHz at time
of order. The Multifrequency Pinger (MFP-1) is operator adjust-
able from 20 to 50kHz. Generally speaking, the lower the fre-
quency of the pinger, the further the signal will travel.
5) Power activation of the pinger is operator selectable. “Off”
position does not allow power to the unit. “On” position forces
the unit on. “Water” position turns the unit on when the pinger
enters the water (when water touches the metal contacts on top
of the transducer).
If it is going to be a long term deployment the “On” position is
recommended (Metal Contacts could possibly become corroded
over a long term).
The signal is radiated out from the transducer end of the pinger. A
floatation collar (included) is installed on the transducer end of the
pinger anytime the pinger is tied to a target on the ocean floor. The
floatation collar keeps the transducer end pointed up so that the
radiated signal is upward as well as out to the sides.
The floatation collar is not used when the pinger is tied off to a
target on the surface of the water. In this situation the transducer
would be pointing down (it’s natural orientation).
Retaining Cap
Transducer
Floatation Collar
O-ring holds
Collar in-place
Deployment Cord
connects to this end
Metal Contacts
(for Water power activation)
10
To mark an anchor line for returning divers, use the same setup
as above and tie the pinger cord to the anchor line 6-10 foot up
from the anchor (before deploying the anchor.)
To mark a boat or target on the surface, remove the flotation
collar and tie the pinger cord to the boat (transducer will be
pointed down.)
PINGER DEPLOYMENT
Before deploying the pinger, write down the pinger frequency for
future reference (when you want to find it, you need to know the
frequency.)
The transmitted signal is stronger from the top and sides of the
pinger transducer than it is from the bottom. When marking a target
on the ocean bottom, install the flotation collar under the Retaining
Cap (to keep the transducer pointed up) and tie a cord from the
bottom of the pinger to the target.
To Next Page
Loading...
Need help?
General