NAVMAN
8120/8084
Installation and Operation Manual
51
To set a low fuel alarm for a tank:
1 Press
MENU
twice, select
Fuel,
then select
Setup tanks
.
2 On a multi-tank boat, select the tank to set
the alarm for.
3 Select
Tank alarm
and enter a fuel level
to trigger the low fuel alarm; or enter zero
to disable the alarm.
13-4 Low fuel alarm
When a low fuel alarm is set, the alarm’s fuel
level is shown on the fuel display tank levels
as a red bar. The alarm can also be set using
the Alarms setup menu (see section 19-10)
13-5-1 Selecting a boat speed sensor
The fuel calculations can use boat speeds
from the GPS, or from a paddlewheel sensor
or pitot sensor if these optional sensors are
installed:
Paddlewheel and pitot sensors measure
the speed through the water; GPS speed is
speed over ground; these sensors can give
different values for Range, Economy and
the fuel consumption curves (see section
13-5-2).
A pitot sensor is more accurate than a
paddlewheel sensor at high speeds but is
not accurate at low speeds. A paddlewheel
sensor is more accurate than a pitot sensor
at low speeds.
13-5 Boat speed sensors
To select an optional speed sensor
1 Press
MENU
twice, select
Fuel,
then select
Speed source
.
2 To use a paddlewheel or pitot sensor,
select
Water speed
, otherwise select
Ground speed
to use GPS speed.
3 If you selected Water speed and you have
both a paddlewheel sensor and a pitot
sensor:
i Press
ESC
, select
SmartCraft
and
select
Speed type
ii Select
Paddlewheel
or
Pitot
.
Tip:
You can select a different speed
sensor during a trip.
C When you remove fuel
1. Before removing fuel, go to the Fuel
display, press
MENU
and select
Set
remaining
.
2. On a multi-tank boat, select the tank that
you are removing fuel from.
3. Write down the value of Remaining for the
tank; this is the amount of fuel originally in
the tank.
4. Remove fuel from the tank and write down
how much fuel you remove.
5. Subtract the amount of fuel you removed
from the amount of fuel originally in the
tank to calculate the amount of fuel now
in the tank.
6. Change the number on the Set Remaining
menu to the amount of fuel that you
calculated was now in the tank.
7. Press
ENTER
Note:
You can also use this procedure when
you add fuel to a tank. In this case, add the
fuel you have added to the amount of fuel
originally in the tank to calculate the amount
of fuel now in the tank.
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