Tempera ture
The factory settings shoul d be sufficien tly
accurate for normal usage. To calibrate the
temperature readout, first measu re the water
temperature with a thermometer known to
be accurate.
Use the cursor keys to display the temperature
readout box, then increase or decrease the
value to match the measured temperature. The
temperature can be set from 32° to 99.9°F (0 ° to
37.7°C) with a resolution of 0.1° unit.
To change the units between °F (Fahrenhe it) or
°C (Celsius), see section 3-6 S etup > Units.
Temp fil ter
Increase this setting to stabilise a n erratic
temperature reading. Decrease to improve
reading responsiveness. The temperat ure filter
can be set from 0 to 30 seconds.
Fuel
Calibrating the fuel usage can improve t he
accuracy of fuel measurements.
Twin engine installations require each fuel
transducer to be calibrated. This can b e done
at the same time with two portabl e tanks or at
different times using one por table tank.
Calibrating the fuel transducer(s ) requires
accurate measurement of the fuel
consumption. This is best done using a sm all
portable tank. At least 4 gallo ns (15 litres) of
fuel should be used to ensure an accurate
calibration.
It is often very difficult to fi ll underfloor t anks
to the same level twice due to air pockets, s o
the more fuel used, the more accurate the
calibration.
To calibrate the fuel transducer(s), per form the
following steps:
1. Re cord the level of the fuel in th e tank(s).
2. Conn ect the portab le tank(s) to the engine
through the fuel transducer(s).
3. Ru n the engine at normal cr uising speed
until at least 4 gallons (15 litres) of fuel has
been used per engine.
4. Che ck the actual amount o f fuel used per
engine by refilling the portab le tank(s) to
the original level and noting the reading (s)
from the fuel dispenser’s gauge.
5. Select Fuel. Use the cursor keys to change
the reading for each engine to match that
on the fuel dispenser’s gauge.
6. Press ENT when the reading is correct.
Note: If the fuel calibration options app ear
to give erroneous readings after a while,
first check that the fuel sensor ha s been
installed correctly according to the i nstallation
instructions supplied with it. T hen see
Appendix B - Troubleshooting.
Keel offset
Keel offset is a depth correction re presenting
the vertical distance between th e depth
transducer and the location from whi ch the
depth is to be measured.
Enter a positive keel offset value when the
transducer is located below the water sur face
but the total depth is required.
Enter a negative keel offset value when the
depth below the deepest part of t he boat is
required (such as the keel, the rudder or th e
propeller) and the transducer is locate d closer
to the water surface.
Use the cursor keys to select Keel offset,
then press to d isplay the Keel offs et box.
Use the or cursor keys to adjust the v alue.
Note: Boat illustrated uses a through hull transducer
Water surface
Depth of transducer
Negative
value
Transducer
Positive
value

Warning:

Extreme precautions must be
observed when carrying out this
procedure.
Failure to do so could create
hazardous conditions that can
cause serious personal or
property damage.
FISH 4432/4433 Installation and Operation Manual 16
NAVMAN