Fuel Flow Calibration - Garmin G3X Touch Pilot's Manual

3.4 FUEL FLOW CALIBRATION

The K-Factor represents the number of electrical pulses output by the fuel flow
sensor per gallon of fuel. Aspects unique to each installation will affect the accuracy
of the initial K-Factor, and as a result, the K-Factor must generally be adjusted up or
down to increase the accuracy of the fuel flow calibration.
If the fuel usage reported by the G3X Touch differs from the actual fuel usage (as
measured at the fuel pump or other trusted method of measurement), the K-Factor can
be adjusted either in Configuration Mode (as described in the G3X Touch Installation
Manual) or by using the Fuel Flow Calibration Menu in Normal Mode.
NOTE: Do not adjust the Actual Fuel Used unless at least 10 gallons of fuel
has been used. The more fuel used, the more accurate the fuel flow calibra-
tion adjustment will be.
Adjusting the K-Factor:
1) From the ENG Page, touch the Fuel Calculator Tab.
2) Press the MENU Key.
3) Touch Calibrate Fuel Flow.
4) Touch Actual to enter the 'Actual' amount of fuel used and touch Enter.
The system automatically adjusts the K-Factor for the fuel flow sensor to
match the observed fuel used.
Once an 'Actual -Fuel Used' value is entered, the corresponding 'Adjustment - Fuel
Flow' percentage is displayed. It is also possible to adjust the fuel flow using the
'Adjustment - Fuel Flow' field directly. Entering an adjustment percentage will adjust
the 'Actual - Fuel Used' value accordingly. However, this is not the method used to
adjust the K-Factor to increase the accuracy of the fuel flow calibration.
190-02472-00 Rev. D
Fuel Flow Calibration
Garmin G3X Touch ™ Pilot's Guide for Certified Aircraft
EIS
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