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flow transducers, elbows, fittings, pipe sizes, hoses and routing methods used during installation for any fuel flow
gauge can cause the flow transducer to output different electrical pulses per gallon (called K Factor) than what it
did when it was tested on the bench. To insure accuracy, which is essential, the FP-5 provides a Pilot Program-
mable K Factor to correct for these differences.
Initially, the FP-5 K factor is set to a value which is marked on a tag shipped with the flow transducer. After
the first few fill-ups, the K Factor may be adjusted to correct for any inaccuracies. See the Pilot Programmable
Modes section in this manual for further details.
If the programmable Low Fuel Reminder Limit has been violated, a bar in the upper left corner of the display
will be shown when this mode is selected. If the programmable Low Fuel Warning Limit has been violated, a bar
in the lower left corner of the display will be shown when this mode is selected.
7. USED Display Mode:
In the USED Display Mode, the FP-5 will display the fuel used from the time the aircraft electrical power
was turned on. If the electrical power is turned off, the Fuel USED will reset to 000. Fuel USED will be dis-
played as follows:
A. When set to display in Gallons the display will read in .1 Gal increments up to 99.9 Gals. and 1 Gal
increments up to 999 Gals.
B. When set to display in Imperial Gallons the display will read in .1 Gal increments up to 99.9 Gals. and
1 Gal increments up to 811 Gals.
C. When set to display in Pounds the display will read in 1 Lb increments up to 1999 Lbs.
D. When set to display in Liters the display will read in 1 Ltr increments up to 1999 Ltrs.
The K Factor programmed into the FP-5 will affect the Fuel USED. See the Pilot Programmable Modes
section in this manual for further details.
8. T. to E. (Time to Empty) Display Mode:
Time to Empty is calculated by dividing Fuel Remaining by Fuel Flow. The value is displayed in hours and
minutes up to 19 hours and 59 minutes.
If the programmable Low T. to E. Limit has been violated, a bar in the upper left corner of the display will be
shown when this display mode is selected.
9. PRESS (Pressure) Display Mode:
In the PRESS mode, the FP-5 will display fuel pressure in .2 PSI increments from 1 to 99.9 PSI. Readings
below 1 PSI will be displayed as 000.
If the programmable High Pressure Limit is violated, a bar will appear in the upper left corner of the LCD