FP-5 and FP-5L
Operating Instructions
System Description:
The FP-5 and FP-5L are models of fuel flow computer and pressure instruments packaged in a 2.5" by 2.5" by
3.65" depth case. Each connects to a fuel flow transducer and a fuel pressure transducer which are mounted in the
engine cowling area. The fuel pressure transducer is optional and is required only if fuel pressure is to be moni-
tored.
The fuel flow transducer is mounted in the fuel line going to the carburetor (or flow divider on an injected
engine). If the rotor in the flow transducer becomes blocked, it will not reduce the flow of fuel to the engine. The
FP-5 instrument connects to the transducers via a wire harness. The instrument and transducers employ connectors
so they may be removed safely and quickly from the aircraft.
The FP-5 and FP-5L have five display modes: Fuel Flow, Fuel Remaining, Fuel Used, Time to Empty, and
Fuel Pressure. The FP-5L has all the feature of the FP-5 with two additional display modes: Fuel to Destination
and Fuel Reserve. In addition to these five display modes both units have the following pilot programmable modes:
Full Fuel Level, K Factor, Filter, Display Update Time, Loran/GPS Interface (FP-5L only), Display in Gallons,
British (Imperial) Gallons, Pounds or Liters, Fuel Remaining, two Low Fuel Alarms, Time to Empty Alarm, High
Fuel Pressure Alarm, and a Low Fuel Pressure Alarm. Although the FP-5 and FP-5L are simple to operate, the 11
pilot programmable modes make them very effective and sophisticated fuel management systems.
Note: After the FP-5 or FP-5L has been installed in an aircraft it should be programmed initially as described
in the "Initial Programming" section of the Installation Manual.
3
High/Low Fuel Pressure Warning LED
Low Fuel Warning LED
LCD Display
Display Mode Indicator
5L)
Mode Select Switch
Left Program Button
(Fuel to Destination on
the FP-5L)
LEDs
Right Program Button
(Fuel Reserve on the FP-
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