Electronics International CGR-30P User Manual

Page 24

4.4 K-Factor Adjustments:

Fuel levels are only estimates of the fuel on-board the aircraft and are
derived from fuel flow. Accurate fuel flows depend on an accurate K-
Factor.

If after filling the fuel tanks you find an error in the Fuel Qty

“SINCE ADD” (as shown on the “Fuel: Est Used” screen) when com-
pared to the actual fuel used (as read off the fuel pump), you can manu-
ally or automatically adjust the K Factor. The K-Factor is a measure-
ment of the pulses per gallon that the flow transducer outputs. Due to
variations in the installation of the flow transducer, it may be necessary to
adjust the K-Factor for the first few flights in order to get an accurate fuel
remaining, fuel used and flow reading.

The K-Factor should be changed only when the fuel tanks have been
filled accurately on level ground. After a few adjustments of the K-
Factor, the fuel remaining and the fuel used as calculated by the CGR-
30P should be within a few gallons (or less) of actual and should not need further adjustment. Navigate to the “Fuel
K-Factor” screen to change the K-Factor (see section 6.1).