Lowrance electronic Lowrance Fish-finding Sonar & Mapping GPS LMS-520C - Manual (Page 236)

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4. Press ↓ to select
C
ALIBRATE
and press
ENT
. The Device Calibration
menu will appear.
5. Highlight
N
UM
P
TS
, press
ENT
and select
3
. Press
ENT
.
6.
Make sure your tank is empty, then highlight
F
LUID
L
EVEL
and press
ENT
.
Select E
MPTY LEVEL
and press ENT.
7.
Select
C
ALIBRATE
and press ENT
. The following message will appear:
Empty Level Calibration Completed. Press
ENTER
.
8.
Add half a tank of fuel, highlight
F
LUID
L
EVEL
and press
ENT
. Select
H
ALF LEVEL
and press
ENT.
9.
Select
C
ALIBRATE
and press
ENT
. The following message will appear:
Half Level Calibration Completed. Press
ENT
.
10. Fill up the tank, then highlight
F
LUID
L
EVEL
and press
ENT
. Select
F
ULL LEVEL
and press
ENT.
11.
Highlight
C
ALIBRATE
and press
ENT
. The following message will ap-
pear: Full Level Calibration Completed. Press
ENT
, then press
EXIT
re-
peatedly to get back to the main display.
Num Pts menu with 5-point calibration selected (left). Half level selected on
Fluid Level menu (center). Calibration Done window (right).
5-Point Calibration
5-point calibration is best suited tanks that vary greatly in shape from
top to bottom. You can begin calibration at any point in the 5-point cali-
bration process. We recommend starting calibration with an empty
tank. In a five-point calibration you will set five points: Empty Level, 1
Qtr Level, Half Level, 3 Qtr Level and Full Level.
In a 5-point calibration, you will have four calibration points left after
calibrating your tank's Empty Level. To figure out how much fuel you
should add for the remaining steps of the calibration process, divide the
total capacity of you tank by four. So, if you have a 40-gallon tank, each
quarter tank will equate to 10 gallons.
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