Navman Datahelm 8120 Installation And Operation Manual page 49

13-3-2 Managing fuel consumption curves
Record several curves for different conditions.
Renaming a curve
then select Fuel.
1 Press
SETUP
2 Select Fuel consumption curve.
Select Name, press
name of the curve to rename.
3 Select Rename and press
the name and press
Deleting a curve
1 Press once or more until the Setup
MENU
menu is displayed, then select Fuel.
2 Select Fuel consumption curve.
Select Name, press
name of the curve to delete.
3 Select Delete and press
13-3-3 Using fuel consumption curves
A fuel consumption curve is displayed on the
fuel window:
a For a twin engine boat, keep the RPM of
both engines similar while using a curve.
b More information about fuel consumption
curves is available in Navman's Diesel flow
sensors installation and operation manual.
Displaying a curve
1 To go to the Fuel window, press
select Other, then select Fuel.
2 Press , press
MENU
name of the curve to display on the fuel
window.
Using a curve
Compare your boat's performance now,
at the current RPMs, with the boat's
performance when you made the curve. You
can compare your boat's performance now
with a curve made under ideal conditions or
with a curve made under similar conditions.
49
and select the
ENTER
. Change
ENTER
.
ENTER
and select the
ENTER
.
ENTER
,
ENTER
and select the
ENTER
Information in a curve
A RPM of the boat now. For a twin engine
boat, the RPM is the average of the two
RPMs.
B Red curve: boat speeds at different
RPMs recorded when you made this fuel
consumption curve.
C Red marker: the boat speed now. This
marker is below the red curve, showing
that the boat speed now at this RPM is less
than when you recorded the curve.
E
C
A
D Blue curve: fuel consumption at different
RPMs recorded when you made this fuel
consumption curve.
E Blue marker: the fuel consumption now.
This marker is below the blue curve,
showing that the fuel consumption now at
this RPM is better than when you recorded
the curve.
F If the blue curve has a dip, then running
the boat at this RPM will give the best
speed for the least fuel consumption.
8120 Installation and Operation Manual
F
D
B