Electronics International MVP-50P - Manual (Page 28)

“K Factor Adjustment” Section:
If after filling the fuel tanks you find an error in the fuel “Calc’d Used Since Fill up” field (as shown on the
screen) when compared to the actual fuel used (as read off the fuel pump), you can manually or automatically
adjust the K Factor. The K Factor is a measurement 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 MVP should be
within a few gallons (or less) of actual and should not need further adjustment. Use the following fields, as
necessary, to correct the K Factor.
Calc’d Used Since Fill up: This field displays how much fuel the MVP calculated you used since the
last fill up, based on the current K Factor.
Actual (Pump Reading): If there is an error in the calculated Fuel Used, enter the actual fuel used
(pump reading) in this field to correct the K Factor.
Percentage Error: This field displays the percentage of difference between “Calc’d Used Since Fill
up” and “Actual (Pump Reading)” fields. A large % error may be an indication that you did something
wrong.
Auto Adjust K Factor?: Selecting this option will allow the MVP to automatically correct the K
Factor based on the data entered in the fields above.
K Factor: The K Factor is the number of pulses per gallon the fuel sender outputs. Installation
plumbing can affect this number. To achieve excellent accuracy the K Factor may have to be tweaked.
This number can be set either manually or automatically. When you change the K Factor, the
accuracy of the MVP’s Fuel Remaining, Fuel Used and Fuel Flow readings will change. The
K Factor can be changed manually using the following formula:
(Calc’d Used Since Fill up) x (K Factor)
New K Factor = ——————————————————
Actual Fuel Used (Pump Reading at Fill up)
Bottom Section:
Fuel Mgmt Units: This field changes the units of measure as displayed on the “Add Fuel,” “Fuel
Management” and “Weight & Balance” screens.
“Default Full Level 1” and “Default Full Level 2:” These two fields allow you to change the default fuel
levels used in the top portion of this screen.
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