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17Tracker500/500i User Manual
9.2 Fuel used calibration (Transducer calibration)
Without calibration, accuracy can be expected to be better than 10%. By recording the
actual fuel usage of your boat over a period of time, it will be possible to adjust the
Tracker500i to give consistently accurate readings within a 2% tolerance.
In a twin engine installation you can calibrate the port and starboard transducers
independently.
To calibrate your fuel transducer you will need to accurately measure the fuel used. This is
most easily done with a small portable tank. It should be noted that, due to air pockets, it is
very difficult to fill under-floor tanks to the same level twice. At least 15 litres should be used
to ensure an accurate calibration. Each transducer in a twin engine installation must be
calibrated. This may be done at the same time with two portable tanks, or at different times
with one tank.
The procedure is as follows:
1)Reset the fuel used amount on the Tracker500i to 0.0
2)Connect the measurement tank(s) to the engine(s) via the fuel transducer(s).
3)Run the engine(s) at normal cruising speed until at least 15 litres is indicated (30 for
twin engines).
4)Check the actual amount of fuel used per engine. The easiest way to do this is to refill
the tank(s) to the original level(s) and record the value(s) shown on the fuel dispenser.
5)Select the fuel calibrate value. The amount that the Tracker500i has recorded is
displayed. Use the cursor keys to enter the actual fuel amount used. Press Esc when
the value is set. Confirm that you want to save the changes. (Repeat for other engine
in twin engine installation).
Single Engine Twin Engine
This is an indication of the calibration factor.
It will be 1.00 as a default.