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Fish 4430/4431 Installation and Operation Manual
Water surface
Depth of transducer
Enter positive values to display depth as measured from a point above the transducer (e.g. water surface).
Enter negative values to display depth as measured from a point below the transducer (e.g. keel).
Negative value
Transducer
Note: Boat illustrated uses a through hull transducer
Positive value
Use Keel Offset either
when the transducer is
located below the water
surface but a display
of total water depth is
required, or when depth
of water below the boat’s
keel is required.
Calibrating the Temperature
The factory settings should be suffi ciently
accurate for normal usage. However, to cali-
brate the temperature readout, fi rst measure
the water temperature.
Then, to calibrate the setting, select
TEMPERATURE then press
to display the
temperature readout box. Press
or
to
increase or decrease the value to match the
measured temperature.
(To change the temperature units between
°F (Fahrenheit) or °C (Celsius), use the SETUP
- UNITS menu (see section 4-2).
4-8 CALIBRATION menu
Use this
menu to
calibrate water
temperature
boat speed, fuel
readings and
the fuel flow
filter.
Select MAIN
MENU - SETUP
- INSTALL
- CALIBRATION
to display the
calibration
menu.
Calibrating the Fish Filter
Use this to adjust the fish detection when
FISH SYMBOLS are switched on. Fish detection
depends on water clarity, fish species and fish
size. Calibration may be required if too little
or too much fish are being detected. Select
more fish symbols to increase the number of
detected fish. Select less fish symbols to reduce
the fish detection.
Calibrating the Speed (F4431 ONLY)
Use this to calibrate the boat’s speed and log.
Calibration may be required because different
hull shapes have different flow characteristics.
Obtain an accurate measurement of the
boat’s speed from a GPS receiver; by following
another boat traveling at a known speed; or by
making a timed run over a known distance.
Note: that for accurate calibration:
· The speed from a GPS receiver should be
greater than 5 knots.
· The speed from another paddlewheel
transducer should be between 5 and 20
knots.
· Best results are achieved in calm conditions
where there is minimal current (best at high
or low tide).
Use
or
to highlight the SPEED option, then
press
to display the speed readout box. Press
or
to increase or decrease the readout to
match the independent speed value.
22


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