Electronics International Inc FP-5 User manual

OI 0505931
Electronics International Inc. ®
63296 Powell Butte Hwy  Bend, OR 97701  [phone]  Buy-E .com
5/5/93
Rev. G: 9/7/95*
Operating Instructions
(FP-5 and FP-5L)
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.

FP-5 and FP-5L
Important Notice
********** Must Read **********
If you think it is not important to read this manual, you're wrong! This
manual contains important information that may affect the safety of your aircraft.
Read the Warranty / Agreement. There is information in the Warranty / Agreement that may alter
your decision to install this product. f you do not accept the terms of the Warranty / Agreement, do not
install this product. This product may be returned for a refund. Contact Electronics International inc. for
details.
The fuel remaining displayed by the FP-5 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-5, minus the fuel
used while the engine was running. When properly calibrated, the FP-5 can accurately measure the
fuel used. It is imperative the pilot verify the calibration of the FP-5 over many tanks of fuel
before using the "R M" and/or "US D" Modes as an indication of the fuel in the tanks or
fuel used. ven after verifying the calibration of the FP-5 it should never be used as the
primary indicator of fuel quantity in the tanks. It is important the pilot visually check/
measure the fuel quantity for each tank before takeoff and crosscheck these readings against
the Fuel Level Gauges and the FP-5. The FP-5 reminds you to do this by blin ing the REM
LED and displaying the current fuel remaining in the tan s each time the aircraft power is turned on.
Also, it is important the pilot use preflight and flight planning techniques, in accordance with
the FAR's, which will help insure the proper amount of fuel for the intended flight is on
board the aircraft before takeoff.
While in flight the FP-5 readings should only be used to crosscheck the fuel level gauges,
calculations of the fuel onboard from flow rates specified in the specification for your aircraft
and calculations of the fuel onboard from flow rates that you measured from previous flights.
The use of the FP-5 does not eliminate or reduce the necessity for the pilot to use good flight
planning, preflight and in-flight techniques for managing fuel. If you are not familiar with
these techniques, contact the FAA to acquire proper training.
It is possible for any instrument to fail thereby displaying ina urate high, low or jumpy readings.
Therefore, you must be able to re ognize an instrument failure and you must be profi ient in operating your
air raft safely in spite of an instrument failure. If you do not have this knowledge, onta t the FAA or a lo al
flight instru tor for training.
The pilot must understand the operation of this product before flying the aircraft. Do not allow anyone
to operate the aircraft that does not know the operation of this product. A copy of this manual must be
kept in the aircraft at all times.

1
Contents
Warranty ................................................................................... 2
System Description: ................................................................ 3
Display Modes and Operating Features: ................................ 4
1. Digital LCD Display and LED Display Mode Indicators: ---------------------------------- 4
2. Low Fuel Warning LED: ------------------------------------------------------------------------ 4
. H/L Pressure Warning LED: ------------------------------------------------------------------- 4
4. Power-Up: ------------------------------------------------------------------------------------------ 4
5. FLOW Display Mode: ------------------------------------------------------------------------- 5
6. REM (Remaining) Display Mode: ----------------------------------------------------------- 5
7. USED Display Mode: -------------------------------------------------------------------------- 7
8. T. to E. (Time to Empty) Display Mode: ---------------------------------------------------- 7
9. PRESS (Pressure) Display Mode: ----------------------------------------------------------- 7
10. F. to D. (Fuel to Destination) Display Mode (FP-5L only): ----------------------------- 8
11. F. Reserve (Fuel Reserve) Display Mode (FP-5L only): --------------------------------- 8
Pilot Programmable Modes: .................................................... 8
1. Power-up Programming Mode (Setting Full Fuel Level, K Factor and Filter): -------- 9
2. FLOW Programming Mode (setting the display for "Gal", "br Gal",
"Lbs" or "Ltr"): -------------------------------------------------------------------------------- 11
. REM Programming Mode (Setting the Fuel Remaining Level): ----------------------- 12
4. USED Programming Mode (Setting the Low Fuel Reminder and
Low Fuel Warning Alarms): -------------------------------------------------------------------- 12
5. T. to E. Programming Mode (Setting the Time to Empty Reminder Alarm): -------- 1
6. PRESS Programming Mode (Setting the High and Low Fuel Pressure Alarms): -- 14
Speci ications and Operating Features ................................. 16

Warranty / Agreement
Electronics International Inc. warrants this instrument and system components to be free from defects in
materials and workmanship for a period of one year from the user invoice date. Fuel Flow and Pres-
sure Transducers are NOT covered under this warranty. They are covered by the original equipment
manufacture. Electronics International Inc. will repair or replace any item covered under the terms of
this Warranty provided the item is returned to the factory prepaid.
1. This Warranty shall not apply to any product that has been repaired or altered by any person other
than Electronics International Inc., or that has been sub ected to misuse, accident, incorrect wiring,
negligence, improper or unprofessional assembly or improper installation by any person. This warranty
does not cover any reimbursement for any persons time for installation, removal, assembly or
repair. Electronics International retains the right to determine the reason or cause for warranty repair.
2. This warranty does not extend to any machine, vehicle, boat, aircraft or any other device to which
the Electronics International Inc. product may be connected, attached, interconnected or used in con-
unction with in any way.
3. The obligation assumed by Electronics International Inc. under this warranty is limited to repair,
replacement or refund of the product, at the sole discretion of 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.
5. Personal injury or property damage do to misinterpretation or lack of understanding this product is solely the
pilots responsibility. The pilot must understand the operation of this product before flying the aircraft. Do not
allow anyone to operate the aircraft that does not know the operation of this product. Keep the Operating Manual
in the aircraft at all times.
6. E. I. Inc. is not responsible for shipping charges or damages incurred under this Warranty.
7. No representative is authorized to assume any other liability for Electronics International Inc. in
connection with the sale of Electronics International Inc. products.
8. If you do not a ree to and accept the terms of this warranty, you may return the product for a
refund.
This Warranty is made only to the original user. THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX-
PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-
NESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT
SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC LOSS.
EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL
OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH
THE USE OR PERFORMANCE OF MANUFACTURERS PRODUCTS, INCLUDING SPECIFI-
CALLY LIABILITY IN TORT.

FP-5 and FP-5L
Operating Instructions
System Description:
The FP-5 and FP-5L are models of fuel flow omputer and pressure instruments pa kaged in a 2.5" by 2.5" by
3.65" depth ase. Ea h onne ts to a fuel flow transdu er and a fuel pressure transdu er whi h are mounted in the
engine owling area. The fuel pressure transdu er is optional and is required only if fuel pressure is to be moni-
tored.
The fuel flow transdu er is mounted in the fuel line going to the arburetor (or flow divider on an inje ted
engine). If the rotor in the flow transdu er be omes blo ked, it will not redu e the flow of fuel to the engine. The
FP-5 instrument onne ts to the transdu ers via a wire harness. The instrument and transdu ers employ onne tors
so they may be removed safely and qui kly from the air raft.
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 Fa tor, Filter, Display Update Time, Loran/GPS Interfa e (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 effe tive and sophisti ated fuel management systems.
Note: After the FP-5 or FP-5L has been installed in an air raft it should be programmed initially as des ribed
in the "Initial Programming" se tion of the Installation Manual.
3
High/Low Fuel Pressure Warning LED
Low Fuel Warning LED
LCD Display
Display Mode Indicator
5L)
Mode elect witch
Left Program Button
(Fuel to Destination on
the FP-5L)
LEDs
Right Program Button
(Fuel Reserve on the FP-

4
Display Modes and Operating Features:
1. Digital LCD Display and LED Display Mode Indicators:
If the digital LCD display ba klight has been permanently powered up (as re ommended), the display will be
easier to see during low ambient light onditions and at night. In dire t sunlight the digital LCD display is easy to
see.
During night operation the green LED Display Mode Indi ators may be too bright. If so, turn the panel light
rheostat up and the LEDs will dim. The two red Warning LEDs will always be displayed at full intensity.
2. Low Fuel Warning LED:
There are two pilot programmable Low Fuel Reminder Limits that will blink the red Low Fuel Warning LED
when violated. One may be set for a low fuel level and the other may be set for a time to empty value (see the
Pilot Programmable Modes se tion of this manual). When either of these two limits are violated the red Low
Fuel Warning LED will start to blink. Pushing any button or swit h will stop the blinking and turn off the warning
LED. Also, a bar in the upper or lower left orner of the display will be shown when displaying REM or T. to
E. depending on whi h limit is violated.
There is one pilot programmable Low Fuel Warning Limit that will blink the red Low Fuel Warning LED
when the limit is violated. This limit is set for a low fuel remaining level (see the Pilot Programmable Modes
se tion of this manual). When this limit is violated the red Low Fuel Warning LED will start to blink. Pushing any
button or swit h will ause the LED to stop blinking and go solid red. Also, a bar in the lower left orner of the
display will be shown when displaying REM. This limit is an emergency warning and should be set to the
lowest a eptable fuel level.
. H/L Pressure Warning LED:
There are pilot programmable High and Low Fuel Pressure Warning Limits that will blink the red H/L PRESS
Warning LED when violated. Pushing any button or swit h will ause the LED to stop blinking and go solid red.
If the High Limit is violated, a bar in the upper left orner of the display will be shown when displaying PRESS.
If the Low Limit is violated, a bar in the lower left orner of the display will be shown when displaying PRESS.
4. Power-Up:
When the air raft master swit h is turned on, the FP-5 will perform a self-diagnosti s test and flash the red
warning LEDs. This allows you to he k the Warning LEDs for proper operation.
After power-up, the FP-5 will blink the Fuel Remaining (REM) LED, and display the fuel remaining in the
tank(s). The REM LED will ontinue to blink until any button or swit h is pushed. The blinking REM LED
is intended as a reminder to update the FP-5 if youve added fuel to the air raft sin e the last flight (see REM
Display Mode).
5. FLOW Display Mode:

By pushing the mode sele t swit h to the right or left, you an sele t the various display modes. In the
FLOW Mode, the FP-5 will display fuel flow as follows:
A. When set to display in Gallons the display will read in .1 Gal/Hr in rements up to 199.9 Gal/Hr.
B. When set to display in Imperial Gallons the display will read in .1 Gal/Hr in rements up to 162.0 Gal/
Hr.
C. When set to display in Pounds the display will read in 1 Lb/Hr in rements up to 1199 Lbs/Hr.
D. When set to display in Liters the display will read in 1 Ltr/Hr in rements up to 749 Ltrs/Hr.
Spe ial algorithms in the mi ro-pro essor are used to insure a qui k response and a stable display. Also, there
are two programmable filter settings that will affe t the stability and response of the fuel flow readings (see the
Pilot Programming Modes se tion of this manual).
The a ura y of the displayed fuel flow an be affe ted by the value of the K Fa tor and Display Update Time
programmed into the FP-5 (see the Pilot Programmable Modes se tion of this manual).
6. REM (Remaining) Display Mode:
In the REM (Fuel Remaining) Display Mode, the FP-5 will display the fuel in the air raft tanks as follows:
A. When set to display in Gallons the display will read in .1 Gal in rements up to 99.9 Gals. and 1 Gal
in rements from 100 to 999 Gals.
B. When set to display in Imperial Gallons the display will read in .1 Gal in rements up to 99.9 Gals. and
1 Gal in rements from 100 to 811 Gals.
C. When set to display in Pounds the display will read in 1 Lb in rements up to 1999 Lbs.
D. When set to display in Liters the display will read in 1 Ltr in rements up to 1999 Ltrs.
The fuel remaining displayed by the FP-5 is not a measurement of the fuel in the tanks. It is an amount
al ulated from the starting fuel level you programmed into the FP-5, minus the fuel used while the engine was
running. When properly alibrated, the FP-5 an a urately measure the fuel used. It is imperative the pilot
verify the calibration of the FP-5 over many tanks of fuel before using the " EM" and/or "USED" Modes as
an indication of the fuel in the tanks or fuel used. Even after verifying the calibration of the FP-5 it should
never be used as the primary indicator of fuel quantity in the tanks. It is important the pilot visually check/
measure the fuel quantity for each tank before takeoff and crosscheck these readings against the fuel level
gauges and the FP-5. The FP-5 reminds you to do this by blinking the REM LED and displaying the urrent
fuel remaining in the tanks ea h time the air raft power is turned on. Also, it is important the pilot use preflight
and flight planning techniques, in accordance with the FA 's, which will help insure the proper amount of
fuel is on board the aircraft before takeoff.
While in flight the FP-5 readings should only be used to crosscheck the fuel level gauges, calculations of the
5

6
fuel onboard from flow rates specified in the specification for your aircraft and calculations of the fuel
onboard from flow rates that you measured from previous flights. The use of the FP-5 does not eliminate or
reduce the necessity for the pilot to use good flight planning, preflight and in-flight techniques for managing
fuel. If you are not familiar with these techniques, contact the FAA to acquire proper training.
If you have added fuel to the air raft but have not filled the tanks, set the FP-5 REM value for the fuel remain-
ing shown on the FP-5, plus the fuel added to the tanks as shown on the fuel pump. If you have filled the tanks, set
the FP-5 REM value for the full fuel level (total useable fuel) in the tanks as spe ified by the airframe manufa turer
in your flight manual. It is important you verify the fuel levels in the tanks before takeoff.
To hange the Fuel Remaining shown on the FP-5, perform the following steps:
A. Sele t the REM display mode (this mode is displayed during power-up).
B. Momentarily push both programming buttons at the same time (you are entering the Add program-
ming mode). The display will show Add at this point.
C. Push either one of the Prg Buttons. The display will show the urrent fuel remaining. The blinking
left digit indi ates that you may program this digit first.
D. Set the Fuel Remaining Level using the following pro edure (if you have topped off the tank, see step
" " below):
a) Sele t a Digit - The Right and Left Prg Buttons move the blinking digit to the right or to the
left.
b) Advan e a Digits Count - Moving the Mode Sele t Swit h to the right will in rease the blinking
digits ount by one. After the blinking digit rea hes 9 it will reset to 0.
) Change Fun tions - Ea h time the Mode Sele t Swit h is pushed to the left, the display will
swit h between the Full Fuel Level (set during Power-up Programming) and the urrent reading.
d) To Exit - To exit the Add Programming Mode, momentarily push both Prg Buttons at the same
time. The programmed values will be stored in memory and no internal batteries or external
power are required to store this information for life.
Fuel remaining is one of the most important al ulations the FP-5 an provide. The differen es between the
Blinking Digit

7
flow transdu ers, elbows, fittings, pipe sizes, hoses and routing methods used during installation for any fuel flow
gauge an ause the flow transdu er to output different ele tri al pulses per gallon ( alled K Fa tor) than what it
did when it was tested on the ben h. To insure a ura y, whi h is essential, the FP-5 provides a Pilot Program-
mable K Fa tor to orre t for these differen es.
Initially, the FP-5 K fa tor is set to a value whi h is marked on a tag shipped with the flow transdu er. After
the first few fill-ups, the K Fa tor may be adjusted to orre t for any ina ura ies. See the Pilot Programmable
Modes se tion in this manual for further details.
If the programmable Low Fuel Reminder Limit has been violated, a bar in the upper left orner of the display
will be shown when this mode is sele ted. If the programmable Low Fuel Warning Limit has been violated, a bar
in the lower left orner of the display will be shown when this mode is sele ted.
7. USED Display Mode:
In the USED Display Mode, the FP-5 will display the fuel used from the time the air raft ele tri al power
was turned on. If the ele tri al 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 in rements up to 99.9 Gals. and 1 Gal
in rements up to 999 Gals.
B. When set to display in Imperial Gallons the display will read in .1 Gal in rements up to 99.9 Gals. and
1 Gal in rements up to 811 Gals.
C. When set to display in Pounds the display will read in 1 Lb in rements up to 1999 Lbs.
D. When set to display in Liters the display will read in 1 Ltr in rements up to 1999 Ltrs.
The K Fa tor programmed into the FP-5 will affe t the Fuel USED. See the Pilot Programmable Modes
se tion in this manual for further details.
8. T. to E. (Time to Empty) Display Mode:
Time to Empty is al ulated 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 orner of the display will be
shown when this display mode is sele ted.
9. PRESS (Pressure) Display Mode:
In the PRESS mode, the FP-5 will display fuel pressure in .2 PSI in rements 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 orner of the LCD

8
display in the PRESS mode, and the H/L Press Warning LED will blink. If the programmable Low Pressure
Limit is violated, a bar will appear in the lower left orner of the LCD display in the PRESS mode, and the
H/L PRESS Warning LED will blink. If the High and Low Pressure Limits are programmed to "00.0", the FP-5
will display "OFF" when the "PRESS" mode is sele ted.
10. F. to D. (Fuel to Destination) Display Mode (FP-5L only):
When the left button is pushed the FP-5L will read the serial data from your Loran/GPS unit and ompute the
Fuel to Destination (or next way point) for the urrent onditions: Fuel Flow, Fuel Remaining, Ground Speed and
Distan e to Destination. This pro ess will take from one to three seconds depending on the update time of the
Loran/GPS unit. If the fuel required to rea h the way point is more than the fuel remaining as shown on the FP-5L,
the Low Fuel Warning LED will ome on.
If serial data is not present on the proper pin of the FP-5L, the display will read "OFF". This may be the ase
if the Loran/GPS unit is not re eiving a signal. If serial data is present, the display will read " on." If the serial
data does not mat h RS232 proto ol, a bar high in the left display will appear along with " on". On e speed and
distan e data has been re eived, the Fuel to Destination (or next way point) will be omputed instantly and dis-
played on the FP-5L.
11. F. Reserve (Fuel Reserve) Display Mode (FP-5L only):
When the right button is pushed the FP-5L will read the serial data from your Loran/GPS unit and ompute
the Fuel Reserve for the urrent onditions: Fuel Flow, Fuel Remaining, Ground Speed and Distan e to Destina-
tion. The Fuel Reserve is the fuel you will have in your tank on e you rea h the destination (or next way point)
programmed on the Loran/GPS unit (Fuel Reserve = Fuel Remaining - Fuel to Destination). If the fuel required to
rea h the way point is more than the fuel remaining as shown on the FP-5L, the Low Fuel Warning LED will ome
on and the Fuel Reserve will be displayed as a negative number (i.e., " -3" would mean you are 3 gallons short of
rea hing your destination).
When the Fuel Reserve button is pushed it will take from one to two seconds, depending on the update time of
the Loran/GPS unit, to read and ompute the serial data. If serial data is not present on the proper pin of the FP-
5L, the display will read "OFF". If serial data is present the display will read " on." If the serial data does not
mat h RS232 proto ol, a bar high in the left display will appear along with " on". On e speed and distan e data
have been re eived, Fuel Reserve will be omputed instantly and displayed on the FP-5L.
Pilot Programmable Modes:
The FP-5 has 11 Pilot Programmable Modes. These programmable modes are what make the FP-5 versatile,
a urate and so effe tive at managing fuel. For power-up and ea h of the display modes there are one to three
programmable modes that may be set from the front panel of the FP-5. Most of these programmable modes need to
be set only on e to mat h your engine and desired warning levels. The matrix outlines the Pilot Programmable
Modes for power-up and the different display modes. The method used to program the FP-5 is the same method
used to program the Ultimate Analyzer (US-8).
Although programming may be new to some of you, programming the FP-5 is simple. After a few tries, you
should have the hang of it. No matter whi h buttons you push or parameter you set you annot hurt the FP-5 and
any parameter an be reset.

9
Note: The FP-5 will not a ount for any fuel used while in the any of the programming modes.
1. Power-up Programming Mode (Setting Full Fuel Level, K Factor, Filter and Loran/GPS Interface):
Display Modes
Power-up FLOW REM USED T. to E. PRESS
Programming
Full Fuel Level Display in
Gal, br Gal,
Lbs. or Ltr.
Add Fuel Low Fuel Reminder Alarm Time to Empty
Alarm High Pressure Alarm
Modes K Factor Low Fuel Warning Alarm Low Pressure
Alarm
Filter
Display Update
Time
Loran/GPS
Interface
(FP-5L only)
In the Power-up Programming Mode the following fun tions may be set:
Full Fuel Level - The Full Fuel Level should be set for the total useable fuel for your air raft as spe ified by
the airframe manufa turer in the Flight Manual or it may be set for a level to whi h you most often fill your
tanks. This value is used as a default level when programming the Fuel Remaining Level of the FP-5.
K Factor - The K Fa tor represents the number of ele tri al pulses per gallon the FP-5 expe ts to see from the
flow transdu er. Changing the K Factor changes the accuracy of the FP-5. Initially, the K Fa tor should
be set to a value whi h is marked on the tag atta hed to the flow transdu er.
Example: Value marked on tag: 16-8604.
16 = 16 gallon per hour ben h test flow rate.
8604 = 86,040 pulses per gallon measured on the ben h.
Set the K Fa tor on the FP-5 for the first three digits on the tag (860).
The differen es between the elbows, fittings, pipe sizes, hoses and routing methods used during installation
and the fuel pressure for your air raft an, for any fuel flow gauge, ause the flow transdu er to output a
different number of ele tri al pulses per gallon (K Fa tor) than when it was tested on the ben h. To orre t
for any errors in the K Fa tor, keep tra k of the A tual Fuel Used (fuel required to bring the tanks ba k to
full) and ompare this with the FP-5 Fuel Used (Full Tank Level minus Fuel Remaining as displayed on the
FP-5). If your error is less than 3 gallons for a single tank, you should average the error over 3 tanks of fuel.
Use the following formula to orre t the K Fa tor:
Note: When refueling an air raft fuel tank, it is not easy to fill the tanks to the same exa t level ea h time.
New K Fa tor = A tual Fuel Used
(FP-5 Fuel Used) x (Current K Fa tor)

Some variables are: 1. How level the wings are during refueling. 2. The effe ts of any rossover tubes. 3.
The ability of the line attendant to fill the tank to the same mark. The shape of the tank and the dihedral of the
wing an aggravate the situation.
Note: K Fa tor settings below 580 will ause the display resolution to in rease above .1 Gal/Hr. when used
with a Display Update Time setting of "UP2." K Fa tors below 180 will ause the display resolution to
in rease above .1 Gal/Hr. when used with a Display Update Time setting of "UP1." The FT-90 Flow Trans-
du er has a K Fa tor around 198.
Filter - There are two filters used by the FP-5 to remove flu tuation or jump in the fuel flow readings. Sele t-
ing either filter will not affe t the a ura y of the FP-5. Use filter F 1 for most fuel-inje ted engines. This
filter has the fastest response time (eight times faster than other flow gauges). Use filter
F 2 for most arbureted engines. This filter has a slightly slower response time than F1 (still faster than
other flow gauges) but will take out any flu tuation or jump you may have seen using the F1 filter.
Display Update Time - The Display Update Time may be set to "UP2" or "UP1". A "UP2" setting auses
the display to update two times per se ond and a .1 Gal/Hr. resolution an be maintained for K Fa tors from
580 to 999. A "UP1" setting auses the display to update on e per se ond and a .1 Gal/Hr. resolution an be
maintained for K Fa tors from 180 to 999. When using the FT-60 Flow Transdu er use the "UP2" setting.
When using the FT-90 Flow Transdu er use the "UP1" setting if .1 Gal/Hr. resolution is required, otherwise a
"UP2" setting would be preferred.
Loran/GPS Interface (FP-5L only) - The Loran/GPS Interfa e may be set to "L 1" or "L 2". A "L 1"
setting is used to interfa e the FP-5L to any of the following units that have a moving map output: King,
ARNAV, Garmin, Trimble, II Morrow or Foster. A "L 2" setting is used to interfa e the FP-5L to any
Northstar unit with a moving map output.
To program the Full Fuel Level, K Factor, Filter Display Update Time and Loran/GPS Interface,
perform the following steps:
A. Turn the air raft ele tri al power off, push both Prg Buttons, and hold them in.
B. Turn the air raft ele tri al power on, wait two se onds, then release the Prg Buttons. At this point,
the far left digit should be blinking and there should be a Gal or Lbs annun iator in the right
orner of the display. All the green display mode LEDs should be off. If this is not the ase, start
over with step A. The Full Fuel Level is being displayed and you are now ready to program the Full
Fuel Level, K Fa tor, Filter, Display Update Time and Loran/GPS Interfa e using the following
pro edure:
a) Sele t a Digit - The Right and Left Prg Buttons move the blinking digit to the right or to the
10
Blinking Digit

11
left.
b) Advan e a Digits Count - Moving the Mode Sele t Swit h to the right will in rease the blinking
digits ount by one. After the blinking digit rea hes 9 it will reset to 0.
) Change Fun tions - Ea h time the Mode Sele t Swit h is pushed to the left, the displayed fun tion
will hange as follows:
Full Fuel Level (shown with a Gal, Lbs or no indi ator, for liters, at the right)
K Fa tor (shown with no indi ators)
Filter (shown as "F 1" or "F 2")
Display Update Time (shown as "UP2" or "UP1")
Loran/GPS Interfa e on FP-5L only (shown as "L 1" or "L 2")
d) To Exit - To exit the Power-up Programming Mode, momentarily push both Prg Buttons at the
same time. The programmed values will be stored in memory and no internal batteries or external
power are required to store this information for life.
2. FLOW Programming Mode (setting the display for Gal, "br Gal", Lbs or "Ltr"):
In the FLOW Programming Mode the FP-5 may be set to display Fuel Flow, Fuel Remaining and Fuel Used
in Gallons, British (Imperial) Gallons, Pounds or Liters.
To program the display, perform the following steps:
A. Sele t the FLOW Display Mode.
B. Momentarily push both Prg Buttons. Either Gal", "br Gal", "Lbs" or Ltr will be shown in the
display. You are ready to program the FP-5 to display in Gallons, British (Imperial) Gallons, Pounds
or Liters.
C. Set the Display using the following pro edure:
a) Change the display to "Gal", "br Gal", "Lbs" or "Ltr" - Moving the Mode Sele t Swit h to the
right while pushing the left program button will alternate the display between "Gal", "br Gal",
"Lbs" and "Ltr".
b) To Exit - To exit the Flow Programming Mode, momentarily push both Prg Buttons at the
same time. The programmed values will be stored in memory and internal batteries or external
power are not required to store this information for life.
. REM Programming Mode (Setting the Fuel Remaining Level):

12
Ea h time you add fuel to the air raft the Fuel Remaining (as shown on the FP-5 in the REM Display
Mode) needs to be updated. This pro edure was des ribed previously in the Display Modes and Operating
Features se tion of this manual.
4. USED Programming Mode (Setting the Low Fuel Reminder and Low Fuel Warning Alarms):
In the USED Programming Mode the following fun tions may be set:
Low Fuel eminder Alarm - A low fuel alarm may be programmed to blink the Low Fuel Warning LED
when the fuel remaining rea hes your programmed set point. Pushing any button or swit h will turn off the
blinking LED. This limit is intended as a reminder. It may be set to remind you to swit h tanks or when a
spe ified amount of fuel remaining in the tanks has been rea hed. A good point to use in setting this alarm is
at the 1/3 fuel remaining level. In the REM Display Mode a bar in the upper left orner of the display will
be shown when the Low Fuel Reminder limit has been violated. Programming this alarm to 000 disables the
alarm.
Low Fuel Warning Alarm - A low fuel warning may be programmed to blink the Low Fuel Warning LED
when the fuel remaining rea hes your programmed set point. Pushing any button or swit h will stop the
blinking but the Low Fuel Warning LED will stay on. This limit is intended as an emergency warning. It
should be set to the lowest fuel level in the tanks you would ever want to rea h. A good point to use in setting
this alarm is thirty minutes worth of fuel (at ruise) for a VFR pilot or forty-five minutes for an IFR pilot. In
the REM Display Mode a bar in the lower left orner of the display will be shown when Low Fuel Warning
limit has been violated. Programming this alarm to 000 disables the alarm.
To program the Low Fuel Reminder Alarm and the Low Fuel Warning Alarm, perform the following steps:
A. Sele t the USED Display Mode.
B. Momentarily push both Prg Buttons. A bar will appear in the upper left orner of the display and
the left digit will be blinking. You are ready to program the Low Fuel Reminder level.
C. Set the Low Fuel Reminder and Low Fuel Warning levels using the following pro edure:
Blinking Digit
a) Sele t a Digit - The Right and Left Prg Buttons move the blinking digit to the right or to the
left.
b) Advan e a Digits Count - Moving the Mode Sele t Swit h to the right will in rease the blinking
digits ount by one. After the blinking digit rea hes 9 it will reset to 0.
) Change Fun tions - Ea h time the Mode Sele t Swit h is pushed to the left, the display will

13
swit h between programming the Low Fuel Reminder alarm (shown with a bar in the upper left
orner of the display) and the Low Fuel Warning alarm (shown with a bar in the lower left
orner of the display).
d) To Exit - To exit the USED Programming Mode, momentarily push both Prg Buttons at the
same time. The programmed values will be stored in memory and no internal batteries or external
power are required to store this information for life.
5. T. to E. Programming Mode (Setting the Time to Empty Reminder Alarm):
In the T. to E. Programming Mode the Low Time to Empty Alarm may be programmed to blink the Low
Fuel Warning LED when the Time to Empty al ulated by the FP-5 rea hes your programmed set point. Pushing
any button or swit h will turn off the blinking LED. This limit is intended as a reminder. It may be set to remind
you to swit h tanks or when a spe ified time to empty has been rea hed. In the T. to E. Display Mode a bar in
the upper left orner of the display will be shown when this limit has been violated. Programming this alarm to
0:00 disables the alarm.
To program the Time to Empty Alarm, perform the following steps:
A. Sele t the T. to E. Display Mode.
B. Momentarily push both Prg Buttons. There will be a bar in the upper left orner of the display and
the left digit will be blinking. You are ready to program the Time to Empty Reminder Level using the
following pro edure:
a) Sele t a Digit - The Right and Left Prg Buttons move the blinking digit to the right or to the
Blinking Digit
left.
b) Advan e a Digits Count - Moving the Mode Sele t Swit h to the right will in rease the blinking
digits ount by one. After the blinking digit rea hes 9 (or 5 for the tens minute digit) it will
reset to 0.
) To Exit - To exit the T. to E. Programming Mode, momentarily push both Prg Buttons at the
same time. The programmed values will be stored in memory and no internal batteries or external
power is required to store this information for life.
6. PRESS Programming Mode (Setting the High and Low Fuel Pressure Alarms):

14
In the PRESS Programming Mode the following fun tions may be set:
High Fuel Pressure Alarm - A high pressure alarm may be programmed to blink the H/L Pressure Warning
LED when the fuel pressure ex eeds your programmed set point. Pushing any button or swit h will stop the
blinking but the H/L Pressure Warning LED will stay on. This limit is intended as a warning. It should be
set to the highest a eptable pressure for your air raft (see your Flight Manual). In the PRESS Display
Mode a bar in the upper left orner of the display will be shown when this limit has been violated. Program-
ming this alarm to 000 disables the alarm.
Low Fuel Pressure Alarm - A low pressure alarm may be programmed to blink the H/L Pressure Warning
LED when the fuel pressure drops below your programmed set point. Pushing any button or swit h will stop
the blinking but the H/L Pressure Warning LED will stay on. This limit is intended as a warning. It should
be set to the lowest a eptable pressure for your air raft (see your Flight Manual). In the PRESS Display
Mode a bar will be shown in the low left orner of the display when this limit has been violated. Programming
this alarm to 000 disables the alarm.
If the Pressure Mode is not going to be used, program the High and Low Pressure Alarms to "00.0". This will
ause the display to show "OFF" when the Pressure Display Mode is sele ted.
To program the High and Low Fuel Pressure Alarms, perform the following steps:
A. Sele t the PRESS Display Mode.
B. Momentarily push both Prg Buttons. The display will show a PSI annun iator in the right orner
of the display and a bar will appear in the upper left orner of the display. Also, the left digit will be
blinking. You are ready to program the High Fuel Pressure Alarm.
C. Set the High and Low Fuel Pressure Alarms using the following pro edure:
Blinking Digit
a) Sele t a Digit - The Right and Left Prg Buttons move the blinking digit to the right or to the
left.
b) Advan e a Digits Count - Moving the Mode Sele t Swit h to the right will in rease the blinking
digits ount by one. After the blinking digit rea hes 9 it will reset to 0.
) Change Fun tions - Ea h time the Mode Sele t Swit h is pushed to the left, the display will
swit h between programming the High Fuel Pressure Alarm (shown with a bar in the upper left
orner of the display) and the Low Fuel Pressure Alarm (shown with a bar in the lower left orner
of the display).
d) To Exit - To exit the PRESS Programming Mode, momentarily push both Prg Buttons at the

same time. The programmed values will be stored in memory and no internal batteries or external
power are required to store this information for life.
15

16
Specifications and Operating Features
Model:
FP-5 and FP-5L (Fuel Flow/Pressure Instrument)
Case Dimensions:
2.5" x 2.5" x 3.65" depth, 2 1/4" Bezel.
Weight:
Unit Only: 11 Oz.
Pressure Transdu er: 6 Oz.
Flow Transdu er: 3 Oz.
Environmental:
Meets TSO C44a/C47
Power Requirements:
7.5 to 35 Volts, 1/10 Amp.
Green Display Mode Indi ator LED's:
The intensity of these LED's is ontrolled by the dimming wire. 12 or 24 volts on this wire will dim the LED's
for night operation.
Red Low Fuel Warning LED:
This LED will blink any time the programmed Low Fuel Reminder, Low Fuel Warning or the Time to Empty
Limit is violated. The Low Fuel Warning LED is always displayed at full intensity and will flash on power-
up.
Red H/L Fuel Pressure Warning LED:
This LED will blink any time the programmed High or Low Fuel Pressure limit is violated. The H/L Fuel
Pressure Warning LED is always displayed at full intensity and will flash on power-up.
Digital Display:
LCD (viewable in dire t sunlight), with 12 and 24 volt ba klight ontrol wires for night operation. Displays
"8888" on power up.
External Warning Control Line:
Grounds when any Red Warning LED is on or blinking. Current should be limited to 2/10 amp.
A ura y:
Flow: 2% or better in a ordan e with TSO C44a.
Pressure: 2% in a ordan e with TSO C47.
Resolution:
Fuel Flow: .1 Gal. or 1 Lb. or 1 Ltr.
Fuel Remaining: .1 Gal. up to 99.9 Gal or 1 Lb. or 1 Ltr.
Fuel Used: .1 Gal. up to 99.9 Gal or 1 Lb. or 1 Ltr.
Time to Empty: 1 minute
Fuel Pressure: .2 PSI.

Max Displayed Range (Unit Only):
Fuel Flow: 199.9 Gals/Hr or 162.0 br Gal/Hr or 1199 Lbs/Hr or 749 Ltr/Hr.
Fuel Remaining: 999 Gals. or 811 br Gal. or 1999 Lbs. or 1999 Ltr.
Fuel Used: 999 Gals. or 811 br Gal. or 1999 Lbs. or 1999 Ltr.
Time to Empty: 19 hours 59 minutes
Fuel Pressure: 1.0 to 99.8 PSI (Readings below 1.0 PSI will be displayed as 00.0 PSI)
Pilot Programmable Modes:
17
RS-232/422 Input Ports (FP-5L Only):
Single Line Re eive Method: RS-232C, RS-423 or 5 Volt Serial.
Dual Line Re eive Method: RS-422 or RS-485.
Proto ol: 1 Start bit, 8 Data bits, 1 Stop bit.
Baud Rate: 9600
Re ieve Format: Same as King, II Morrow, ARNAV and Trimble.
RS-232/422 Output Port (FP-5L Only):
Transmit Method: RS-232C Single Line.
Proto ol: 1 Start bit, 8 Data bits, 1 Stop bit.
Baud Rate: L 1 = 9600, L 2 = 1200
Transmit Format: L 1 = King KLN-88, L 2 = Northstar
Fuel Flow Transdu er, Standard (FT-60):
Range: 0.6 to 60 GPH
Linearity: 1% (8 to 60 GPH)
K Fa tor: Approx. 85,000
Pressure Drop: 1.2 PSI at 30 GPH
4.8 PSI at 60 GPH
Working Press: 200 PSI
Min. Burst Press: 2000 PSI
Temp. Range: -65'C to 125'C
Fuel Ports: 1/4" Female NPT
Fuel Flow Transdu er, Spe ial (FT-90):
Range: 3 to 90 GPH
K Fa tor: Approx. 19,500
Pressure Drop: .31 PSI at 30 GPH
2.8 PSI at 90 GPH
Working Press: 200 PSI
Min. Burst Press: 2000 PSI
Temp. Range: -65'C to 125'C
Fuel Ports: 1/4" Female NPT
Fuel Pressure Transdu er (PT-100GA):
Range: 0 to 100 PSI
Over Press: 300 PSI without damage.
Min. Burst Press: 500 PSI
Temp. Range: -40'C to 125'C
Material: 303 Stainless Steel
Press. Port: 1/4" Male NPT
Display Modes
Power-up FLOW REM USED T. to E. PRESS
Programming
Full Fuel Level Display in
Gal, br Gal,
Lbs. or Ltr.
Add Fuel Low Fuel Reminder Alarm Time to Empty
Alarm High Pressure Alarm
Modes K Factor Low Fuel Warning Alarm Low Pressure
Alarm
Filter
Display Update
Time
Loran/GPS
Interface
(FP-5L only)