Version 16.10 AF-6600 AF-5000 Series Install Manual 199
Fuel System
The Fuel Flow gauge and the Fuel Computer values are all based on readings from the engine mounted fuel
flow transducer. The Fuel Tank Level gauges are bases on the float or capacitance sending unit in the fuel
tank.
Fuel Flow Gauge
K Factor = Fuel Flow transducer counts per .01 gallons
The standard K Factor setting for the EI Red Cube Transducer is 680. You will need to adjust the K Factor
calibration to match the flow transducer and the variations in the installation. After running a tank of fuel use
the following formula to adjust the accuracy.
New K Factor = (old K Factor) x (EFIS Displayed GAL USED/Fuel Pump Gallons)
Fuel Computer
The Fuel Computer (Fuel Totalizer) uses the data from the Fuel Flow gauge to keep track of the amount of
fuel that has been used since the last time the fuel computer was reset (FILL MAINS, FILL ALL, Fuel Total
Adjusted). The Fuel Computer operates independently of the Fuel Tank Level Gauges
The Fuel Computer is constantly
checking its Gallons Remaining value to
the amount of fuel the aircraft Fuel
Gauges show.
If the difference between the Fuel Tank
gauges and the Fuel Computer Gallons
Remaining is greater than the Cross
Check Error Limit value an alert will be
generated.
Cross Check Error Limit
The value should be large enough to
compensate for fuel float transducer
errors when near full and float errors
when the aircraft is not in level flight.
Generally 10.0 gallons is a good starting
point.
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