Raymarine DSM250, Owner'S Handbook Manual

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DSM250 Digital Sounder Module iii
DSM250 Digital Sounder Module
Owner’s Handbook
December 2002
Intended Use
Raymarine DSM250 Digital Sounder Modules provide echo
sounder data that can be displayed on Raymarine PLUS Radar,
Chartplotter, or Fishfinder display units. DSM250 Digital
Sounder Modules are intended for recreational depth finding and
fishfinding purposes.
SAFETY NOTICES
This equipment must be installed and operated in accordance with
the instructions contained in this manual. Failure to do so can
result in personal injury and/or navigational inaccuracies. In par-
ticular:
HIGH VOLTAGE. The DSM250 contains high voltages. Adjust-
ments require specialized service procedures and tools only avail-
able to qualified service technicians – there are no user
serviceable parts or adjustments.
The operator should never
remove the cover or attempt to service the equipment.
CAUTION:
Removing the transducer cable from the rear of the DSM250
while the sounder module is powered on can cause sparks. Only
remove the transducer cable after power has been removed from
the DSM250. As with any electronic device, be sure the sounder
module is mounted where it is well ventilated and free from
gasoline fumes.
If the transducer cable is accidentally removed while the DSM250
is powered on, remove power from the sounder module, replace
the transducer cable, and then return power to the module. As a
safety feature, the DSM250 only recognizes that the transducer is
connected at power-up.