Lowrance electronic LMF-400 - Manual (Page 29)

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To execute 3-Point Calibration: there will be three options in the 3-point
calibration menu: Empty Level, Half Level and Full Level. 3-point
calibration is designed for tanks that vary in shape from the top to the
bottom, leading to an inaccurate fuel level sensor reading, in the
narrower, bottom portion of the tank.
1. Choose the level
(E
MPTY
, H
ALF OR
F
ULL
L
EVEL
) that corresponds with your
tank's current fuel level and press ENTER . If you choose half level, the
following message will appear: Calibrating Set Tank to Half Level Press
Enter.
2. Press
ENTER and you will be taken back to the 3-point menu.
3. Press EXIT to return to the Bus Devices list.
To execute 5-point Calibration: there will be five options in the 5-point
calibration menu: Empty Level, 1 Qtr Level, Half Level, 3 Qtr Level
and Full Level. 5-point calibration is designed for the most uniquely
formed tanks that vary greatly in shape from top to bottom, making an
accurate fuel level sensor reading impossible without calibration.
1. Choose the level (
E
MPTY
, 1 Q
TR
, H
ALF
, 3 Q
TR
or F
ULL LEVEL
) that
corresponds with your tank's current fuel level and press ENTER . If you
chose 3-quarter level, the following message will appear: Calibrating
Set Tank to 3 Qtr Press Enter.
2. Press ENTER and you will be directed back to the 5-point menu.
3. Press EXIT to return to the Bus Devices list.
Fuel Flow
If using the EP-10 Fuel Flow as the Fuel Remaining source, you must
tell the unit when you add fuel or fill the tank. If just adding fuel, but
not topping off the tank, use the
P ARTIAL F ILL
option and enter the
amount of fuel added.
WARNING:
Be sure to carefully follow these instructions, otherwise
fuel calibration could be inaccurate, resulting in
incorrect Fuel Flow, Fuel Remaining, Fuel Economy and
Fuel Range readings.
If you are topping off the tank, but do not want or need to calibrate the
unit, select the
F ILL T ANK
option and choose N O
on the Calibrate option.
To calibrate the EP-10 Fuel Flow, you must use the Refill Tank option.
1. First, fill up the vessel's tank, but do not recalibrate, just input that
the tank has been refilled.
2. Once you have burned at least 5 gallons of fuel, fill up the tank
again, carefully noting how much fuel was added to top off the tank.
The amount of fuel added should be very close to the amount of Fuel