Calibration - Simrad NX40 Installation & Operation Manual

58

13-7 Calibration

Calibrate
installation, or if the fuel readings seem inaccurate and
the other troubleshooting suggestions do not help (see
Appendix B troubleshooting).
Note
• SmartCraft fuel sensors are factory calibrated and
should never need recalibrating.
• On a multi engine boat, calibrate each engine's
sensor. This can be done at the same time with a
portable tank for each engine or at different times
using one portable tank.
• Calibrating
measurement
This is best done using a small portable tank. At
least 4 gallons (15 litres) of fuel should be used to
ensure an accurate calibration.
• It is often very difficult to fill underfloor tanks to the
same level twice due to air pockets, so the more fuel
used, the more accurate the calibration.
To calibrate the sensor(s)
• Record the level of the fuel in the tank(s).
• Connect the portable tank(s) to the engine through
the fuel sensor(s).
• Run the engine at normal cruising speed until at
least 4 gallons (15 litres) of fuel has been used per
engine.
• Check the actual amount of fuel used per engine by
refilling the portable tank(s) to the original level and
noting the reading(s) of the fuel dispenser's gauge.
•
• On a single engine boat, select
the shown value to be equal to the reading of the
fuel dispenser's gauge, then press
• On a multi-engine boat select the engine. Select
Calibrate
to the reading of the fuel dispenser's gauge, then
press
Simrad NX40/45 Installation and Operation Manual
petrol/gasoline fuel
a sensor
of the
> >
Fuel
and change the shown value to be equal
. Repeat for the other engines.
flow sensors
requires accurate
fuel consumption.
>
Setup engines
and change
Calibrate
.
during