14
FISH450 Tricolor FISHFINDER
Installation and Operation Manual
NAVMAN
To use these fuel features first purchase and install
the optional single or twin engine fuel kit.
Access the
Fuel
menu through the
Setup
menu
screen.
Selecting items and
changing values
Press the
Cursor Up
or
Down
key to highlight an
option, then press the
Cursor Right
key to select
it.
Once an option on the
Fuel
menu has been selected,
its value may be changed.
Press the
Cursor Left
and
Right
key to change the
value, then press the
Menu
key to save and exit.
When either
Units
or
Num Engines
is highlighted,
pressing the
Cursor Right
key will cycle through
the available values.
Tank Full
Select
Yes
to set fuel remaining (
Remaining
)
equal
to the tank capacity. IMPORTANT: Do this each
time the fuel tank is refilled or the low fuel alarm
will be meaningless! When partially filling the fuel
tank use
Set Remaining
.
Tank Size
Enters the capacity of the fuel tank into the unit for
use with the
Tank Full
option. It is best to measure
the fuel tank size by draining, then filling with fuel
in the usual manner and using the fuel dispenser’s
meter to measure the amount. Be aware of air
pockets, particularly in underfloor tanks.
Set Remaining
Changes the fuel remaining value. Use this feature
when not filling the fuel tank to capacity, or when
syphoning fuel out.
Clear Used
Resets the fuel used (
Used
) value to 0.0. Use this
to start re-measuring the amount of fuel used.
Units
Sets the units of fuel to
L
(Litres),
USGAL
(US
Gallons) or
IMPGAL
(Imperial Gallons)
Num Engines
Sets the number of engines to 1, 2 or 0. If 0 is
selected the fuel features are turned off and
Fuel
no longer appears on the main menu.
4-2 Fuel
Fuel Cal
Calibrating the fuel usage can increase the
accuracy of fuel measurements from +/- 10% to
better than +/- 2%. For twin engine installations
calibration of each transducer is required.
Calibrating the fuel transducer requires accurate
measurement of the fuel used (
Used
). This is easiest
with a small portable tank. It should be noted that
due to air pockets, it is very difficult to fill underfloor
tanks to the same level twice. At least 15 litres should
be used to ensure an accurate calibration. (The
more fuel used, the more accurate the calibration
will be.) Each transducer in a twin engine installation
must be calibrated separately. This may be done at
the same time with two portable tanks, or at different
times using one tank at a time.
The procedure is as follows:
1) Reset the fuel used amount on the FISH450
Tricolor to 0.0 by selecting
Clear Used
in the
Setup
-
Fuel
menu, then selecting
Yes
.
2) Connect the measurement tank(s) to the
engine(s) via the fuel transducer(s).
3) Run the engine(s) at normal cruising speed
until at least 15 litres is indicated (30 for twin
engines).
4) Check the actual amount of fuel used per
engine. The easiest way to do this is to refill
the tank(s) to the original level(s) and record
the value(s) shown on the fuel dispenser.
5) Select
Fuel Cal
on the fuel menu. The amount
of fuel that the FISH450 Tricolor has recorded
will be displayed. Use the
Cursor Left
or
Right
key to change this to the actual fuel amount
used. Press the
Menu
key when the value is
set. (Repeat for the other engine in a twin
engine installation).
Flow Filter
Sets the period over which the fuel flow is
averaged. Averaging can be set from 1 to 255
seconds.
Normally engines do not draw fuel from the tank
at a steady rate. They draw fuel at a high rate for a
few seconds until the carburettor bowl or fuel
injection reservoir is full, then draw no fuel for a
few seconds. If the true flow rate were displayed,
it would be too erratic to read.
Usually a value of 10-15 seconds will give a
satisfactory result for carburettor engines. Fuel
injected engines may require a larger value.
This setting affects the flow rate (
Flow
) and
Economy
displays. It does not affect the fuel used
(
Used
) measurement.
