Raymarine LIGHTHOUSE 4 Operation Instructions Manual page 100

Run wizard calibration
You can calibrate your tank by setting a series of [calibration points] and
filling your tank in intervals.
The shape of your tank determines how many calibration points you should
enter for calibration. 2 calibration points are required as a minimum, but up to
101 points can be entered. Generally, the more calibration points entered the
more precise tank readings will be.
Additional calibration points are used to account for changes in tank volume
at different parts of an irregularly shaped tank. Depending on the size and
shape of your tank it is recommended that you enter calibration points to
mark each change in the shape of the fuel tank; for example, straight corners
require an additional point, and slopes require 2 points.
100
The illustration above shows the minimum number of calibration points
recommended for some typical tank shapes:
1. The tank shown on the left is rectangular and symmetrical; it only requires
2 calibration points to define the bottom and top of the tank.
2. The tank shown in the center has a greater volume at the bottom; 3
points are required to define the bottom, top and corner of the fuel tank.
3. The tank shown on the right has a greater volume at the bottom and is
sloped. 4 points are required to define the bottom of the tank, the top,
and a further 2 points to define the slope.
[Wizard Calibration]
1. Select the number of calibration points (minimum of 2) and press [next].
2. Fill the tank to the units displayed on screen and press [Ok].
3. To complete the calibration process, repeat step 2 until the tank has
been filled.
Import calibration
You can calibrate your tanks by importing CSV files that contain specific tank
calibration data. These files are typically supplied by tank manufacturers or
dealers.
Note: CSV files used for import calibration must start with: '0,0' and end
in: '100,100'
To [Import calibration] via CSV file:
1. Select the appropriate CSV file from the file explorer.
2. Press [Yes] .