Electronics International FP-5L Operating Instructions Manual

Primary fuel flow / pressure

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Operating instructions manual (20 pages)

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Primary Fuel Flow / Pressure

You must read this manual before installing or operating the instrument. This

manual contains warranty and other information that may affect your decision

to install this product and/or the safety of your aircraft.

Electronics International Inc.

63296 Powell Butte Hwy

(FP-5L)

Operating Instructions

OI 0505931

•

Bend, OR 97701

PRESS

•

(541) 318-6060

• iFlyEi.com

5/5/93

Rev. I: 12/15/22

D-Sub

® ® ® ® ®

• iFlyEi.com

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Questions and answers

Roger Williamson

April 7, 2025

How to calculate the K Factor FP-5-L

1 comments:

Mr. Anderson

April 9, 2025

To calculate the K Factor for the FP-5L, use the following formula:

New K Factor = (FP-5L Fuel Used × Current K Factor) ÷ Actual Fuel Used

Where:
- FP-5L Fuel Used is the amount calculated by the FP-5L (Full Tank Level minus Fuel Remaining).
- Actual Fuel Used is the measured fuel added to refill the tank.

If the error is less than 3 gallons for a single tank, average the error over 3 tanks before recalculating. The K Factor can also be corrected automatically using the "Auto Calibrate Mode."

This answer is automatically generated

Summary of Contents for Electronics International FP-5L

Page 1 You must read this manual before installing or operating the instrument. This manual contains warranty and other information that may affect your decision to install this product and/or the safety of your aircraft. PRESS Electronics International Inc. Electronics International Inc. Electronics International Inc. Electronics International Inc.
Page 2 Blank Page...
Page 3 Contact Electronics International inc. for details. The fuel remaining displayed by the FP-5L is not a measurement of the fuel in the tanks. It is an amount calculated from the starting fuel level you programmed into the FP-5L, minus the fuel used while the engine was running.
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Page 5: Table Of Contents
Contents W W ar ar ar ar arranty ranty ranty ranty ranty ....................................................................................................7 7 7 7 7 System Description: ..................System Description: ..................9 9 9 9 9 System Description: ..................System Description: ..................System Description: ..................Displa Displa Display y y y y , , , , , W...
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Page 7 Electronics International Inc. 4. Electronics International Inc. is not liable for expenses incurred by the customer or installer due to factory updates, modifications, improvements, upgrades, changes, or any other alterations to the product that may affect the form, fit, function or operation of the product.
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Page 9: System Description
System Description: The FP-5L is a fuel flow computer instrument packaged in a 2.5" by 2.5" by 2.7" depth case. The instrument connects to a fuel flow transducer which is mounted in the engine cowling area. A single "PRESS" Channel is optional and may be used to monitor Fuel Pressure.
Page 10: Displa Displa
During night operation the green LED Display Mode Indicators may be too bright. If the LED Dimming Line on the FP-5L is connected to your panel light rheostat, turning the rheostat up will dim the LEDs. If the LED Dimming Line is connected to E.I.'s CP-1 (LED Intensity Control Pot), the Pot will control the LED intensity, independent of other instrument lights.
Page 11: H/L Press Warning Led
The “REM” LED will continue to blink until any button or switch is pushed. The blinking “REM” LED is intended as a reminder to update the FP-5L if you’ve added fuel to the aircraft since your last flight (see “REM”...
Page 12: Displa
*If your FP-5L is certified as a primary replacement instrument for fuel pressure, the pressure alarm limits cannot be changed, as they have been set at the factory. However, if you are using a non-primary FP-5L, you have the flexibility to customize these limits. 1. “FLOW / HP” Display Modes: By pushing the mode select switch to the right or left, you can select the various display modes.
Page 13 Mode" allows you to calibrate the FP-5L to match your engine at a full rich mixture. B. The FP-5L was designed to display in % Horsepower (1% resolution). It is possible to calibrate the FP-5L to display in raw horsepower. See the "Power-Up Programming Mode."...
Page 14: Rem" (Remaining) Display Mode
3. Auto Calibrate Mode: If you find the FP-5L is not displaying the Fuel Remaining in the tank(s) or Fuel Used Since Fill Up accu- rately, you can enter the "Auto Calibrate Mode" and have the FP-5L automatically calibrate the K Factor. This...
Page 15 Normally you will only need to calibrate the K Factor during the first three or four tanks of fuel after the initial installation. The FP-5L uses a progressive algorithm to calibrate the K Factor and to keep the instrument from hunting for the correct K Factor. To enter the "Auto Calibrate Mode", perform the following steps: A.
Page 16: Add Fuel
4. Add Fuel: If you have added fuel to the aircraft but have not filled the tanks, set the FP-5L "REM" value for the fuel remaining shown on the FP-5L, plus the fuel added to the tank(s) as shown on the fuel pump. If you have filled the tank(s), set the FP-5L "REM"...
Page 17: Used" Display Mode
To ensure accuracy, which is essential, the FP-5L provides a pilot- programmable K Factor to correct for these differences. Initially, the FP-5L's K Factor is set to a value which is marked on a tag supplied with the flow transducer. At each fill-up the K factor may be changed using the "Auto Calibrate Mode"...
Page 18: T. To E. / Mpg" (Time To Empty / Miles Per Gallon) Display Mode
19 hours and 59 minutes. By tapping either the "F. to DES" or the "F. RES" button, the FP-5L can be toggle between "Time to Empty", "Nautical Miles per Gallon" (shown with a "n" in the left of the display) and "Statute Miles per Gallon."...
Page 19: F. Reserve (Fuel Reserve) Display Mode
When the "F. RES" button is pushed it will take from one to two sec- onds, depending on the update time of your GPS unit, to read and compute the serial data. If the FP-5L is not receiving data from a GPS, the display will Distance = 180nm show "...
Page 20: Pilot-Programmable Settings
FP-5L, you have the flexibility to customize these limits. Although programming may be new to some of you, programming the FP-5L is simple. After a few tries, you should have the hang of it. No matter which buttons you push or parameter you set you cannot hurt the FP-5L and any parameter can be reset.
Page 21: Setting The Display For "Gal," "Br Gal," "Lbs" Or "Ltr" In The Flow Display Mode
1. Setting the display for “Gal”, "br Gal", “Lbs” or "Ltr" in the "Flow" Display Mode: In the "FLOW" Display Mode the FP-5L may be set to display Fuel Flow, Fuel Remaining and Fuel Used in Gallons, British (Imperial) Gallons, Pounds or Liters.
Page 22: Add Fuel And Auto Calibrate The K Factor
2. Add Fuel and Auto Calibrate the K Factor: This procedure was described previously in the “Display Modes and Operating Features” section of this manual. Blinking Digit (0) 3. Setting the Two Low Fuel Alarms in the "Used" Display Mode: In the "USED"...
Page 23: Setting The Time To Empty Alarm And The Reoccurring Fuel Used Alarm In The "T. To E." Display Mode
Time to Empty Alarm - The Time to Empty Alarm may be programmed to blink the Low Fuel Warning LED when the Time to Empty calculated by the FP-5L reaches your programmed setpoint. Pushing any button or switch will turn off the blinking LED. This limit may be set to remind you to switch tanks or when a specified Time to Empty has been reached.
Page 24: Setting The High And Low Pressure Alarms In The "Press" Display Mode
5. Setting the High and Low Pressure Alarms in the "PRESS" Display Blinking Digits (15) Mode: Important Note: If your FP-5L is certified as a primary replacement instrument for fuel pressure, the pressure alarm limits cannot be changed, 1580 as they have been set at the factory. However, if you are using a non- primary FP-5L, you have the flexibility to customize these limits.
Page 25: P P P P P O O O O O W W W W W Er Er Er Er Er-Up Pr
1&2. First and Second Full Fuel Levels: There are two Full Fuel Levels that may be set in the FP-5L. When adding fuel to the FP-5L, the First and Second programmed Full Fuel Levels may be retrieved automatically. The First Full Fuel Level will be displayed with a bar in the upper left corner of the display.
Page 26: Filter
FP-5L Fuel Used (Full Tank Level minus Fuel Remaining as displayed on the FP-5L). If your error is less than 3 gallons for a single tank, you should average the error over 3 tanks of fuel.
Page 27: Press Channel Fuel Pressure
The GPS Transmit Format configures the FP-5L to transmit data to a GPS. The data transmitted may or may not be used by your GPS (check your GPS Operating Manual). The FP-5L GPS output port will only be enabled when the GPS Receive Format has been set to " In1." For all transmit formats the baud rate is 9600.
Page 28: Scan Rate
11. Add Fuel Resolution: Blinking Digit When adding fuel to the FP-5L the resolution can be set to 1 or 0.1 gallon increments. AF0 - Add fuel in 1 gallon increments from 1 to 1999 gallons.
Page 29: Specifications And Operating Features
Specifications and Operating Features Model: FP-5L (Fuel Flow/Pressure Instrument) Case Dimensions: 2.5" x 2.5" x 2.7" depth, 2 1/4" Bezel. Weight: Instrument Only: 7 Oz. Flow Transducer FT-60 or FT-90: 5.3 Oz. Environmental: Meets TSO C44a/C47 Power Requirements: 7.5 to 35 Volts, 1/10 Amp.
Page 30 Max Displayed Range (Instrument Only): Fuel Flow: 1999 Gals/Hr or 1999 br Gal/Hr or 1199 Lbs/Hr or 749 Ltr/Hr. Fuel Remaining: 1999 Gals. or 811 br Gal. or 1999 Lbs. or 1999 Ltr. Fuel Used: 1999 Gals. or 811 br Gal. or 1999 Lbs. or 1999 Ltr. Time to Empty: 19 hours 59 minutes Pressue:...
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Page 32 Providing Superior Products and Unparalleled Customer Service Since 1979 Learn more about Electronics International & its products at iflyei.com...

Electronics International FP-5L Operating Instructions Manual

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