Calibration Menu - NorthStar EXPLORER 443S Installation And Operation Manual

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.
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).

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 Temperature
The factory settings should be sufficiently
accurate for normal usage. However, to calibrate
the temperature readout, first measure the water
temperature.
Then, to calibrate the setting, select
TEMPERATURE then press
temperature readout box. Press
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).
22
to display the
or to increase
Northstar Explorer 443s/443sp Installation and Operation Manual
Transducer
Note: Boat illustrated uses a through hull transducer
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 (443sp 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.
Water surface
Positive value
Depth of transducer
Negative value