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Northstar Explorer D310 Installation and Operation Manual
4
The Explorer D310 measures and displays the depth
of the water. An installed Explorer D310 usually has
two parts:
The display unit.
A depth transducer, which is attached to the
hull and wired to the display unit.
The unit is powered from the boat’s power supply.
The Explorer D310 is part of the Northstar family of
instruments for boats, which includes instruments
for speed, depth, wind and repeaters. These
instruments can be connected together to form an
integrated data system for a boat (see section 4).
For maximum benefit, please read this manual
carefully before installation and use.
How the transducer measures depth
The depth transducer generates an ultrasonic
(sound) pulse, which travels down through the
water. When the pulse meets the bottom, some of
the pulse is reflected back up towards the boat and
is received by the transducer.
The display unit analyses the reflections from
each pulse. It removes unwanted reflections (from
bubbles and other objects) and calculates the
depth by measuring the time between sending the
pulse and receiving its echo.
Cleaning and maintenance
Clean the display unit and any plastic transducers
with a damp cloth or mild detergent. Avoid abrasive
cleaners, petrol or other solvents.
When repainting the hull, cover or remove any
visible transducers. Depth transducers may be
coated with a thin layer of antifouling paint; gently
sand off any previous paint first.
1 Introduction
Alarm symbol
Display
(backlit)
Four keys
(backlit)
Display normally
shows depth
The Explorer D310 display unit
Depth units
111 x 111 mm
(4.4” x 4.4”)
2 Operation
2-1 Turn on and off
Turn the unit on and off with the auxiliary power
switch on the boat. The unit does not have its own
power switch. When you turn it off, any settings
you have made are retained.
If the word SIMULATE flashes at the top, left of the
display, then the unit is in simulate mode (see section
2-4).
2-2 Basic operation
The keys
The unit has four keys, labelled and
. In this manual:
Press means to push the key for less than one
second.
Hold for two seconds means to hold the key
down for two seconds or more.
Press one key + another key means to push
both keys together.