Electronics FL-2 User Manual

Dual Fuel LevelDual Fuel Level

Dual Fuel Level

Dual Fuel LevelDual Fuel Level

(FL-2RA-12, FL-2RA-24 and FL-2CA)(FL-2RA-12, FL-2RA-24 and FL-2CA)

(FL-2RA-12, FL-2RA-24 and FL-2CA)

(FL-2RA-12, FL-2RA-24 and FL-2CA)(FL-2RA-12, FL-2RA-24 and FL-2CA)

(2nd Generation Instruments)(2nd Generation Instruments)

(2nd Generation Instruments)

(2nd Generation Instruments)(2nd Generation Instruments)

Operating and Installation InstructionsOperating and Installation Instructions

Operating and Installation Instructions

Operating and Installation InstructionsOperating and Installation Instructions

OI 0131941A

10/15/01

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.

Model:Model:

Model:

Model:Model:

S/N:S/N:

S/N:

S/N:S/N:

Electronics International Inc. Electronics International Inc.

Electronics International Inc.

Electronics International Inc. Electronics International Inc.

63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.com63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.com

63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.com

63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.com63296 Powell Butte Hwy • Bend, OR 97701 • (541) 318-6060 • Buy-EI.com

®®

FL-2FL-2

FL-2

FL-2FL-2

Important NoticeImportant Notice

Important Notice

Important NoticeImportant Notice

***** Must Read ********** Must Read *****

***** Must Read *****

***** Must Read ********** Must Read *****

"DO NOT SOLELY RELY ON THE FL-2 TO DETERMINE THE FUEL LEVELS IN THE FUEL"DO NOT SOLELY RELY ON THE FL-2 TO DETERMINE THE FUEL LEVELS IN THE FUEL

"DO NOT SOLELY RELY ON THE FL-2 TO DETERMINE THE FUEL LEVELS IN THE FUEL

"DO NOT SOLELY RELY ON THE FL-2 TO DETERMINE THE FUEL LEVELS IN THE FUEL"DO NOT SOLELY RELY ON THE FL-2 TO DETERMINE THE FUEL LEVELS IN THE FUEL

TANKSTANKS

TANKS

TANKSTANKS planning, preflight and in-flight techniques for managing fuel.planning, preflight and in-flight techniques for managing fuel.

planning, preflight and in-flight techniques for managing fuel.

planning, preflight and in-flight techniques for managing fuel.planning, preflight and in-flight techniques for managing fuel.

." The use of the FL-2 does not eliminate or reduce the necessity for the pilot to use good flight." The use of the FL-2 does not eliminate or reduce the necessity for the pilot to use good flight

." The use of the FL-2 does not eliminate or reduce the necessity for the pilot to use good flight

." The use of the FL-2 does not eliminate or reduce the necessity for the pilot to use good flight." The use of the FL-2 does not eliminate or reduce the necessity for the pilot to use good flight

The following requirements must be met with before operating the aircraft with the FL-2:The following requirements must be met with before operating the aircraft with the FL-2:

The following requirements must be met with before operating the aircraft with the FL-2:

The following requirements must be met with before operating the aircraft with the FL-2:The following requirements must be met with before operating the aircraft with the FL-2:

1. The FL-2 should only be installed in experimental aircraft or a certified aircraft by a T.C. or S.T.C.1. The FL-2 should only be installed in experimental aircraft or a certified aircraft by a T.C. or S.T.C.

1. The FL-2 should only be installed in experimental aircraft or a certified aircraft by a T.C. or S.T.C.

holder.

holder.holder.

2. All of the Operating Instructions must be read. There is important information in this manual which

2. All of the Operating Instructions must be read. There is important information in this manual which2. All of the Operating Instructions must be read. There is important information in this manual which the pilot must understand before flying the aircraft.the pilot must understand before flying the aircraft.

the pilot must understand before flying the aircraft.

the pilot must understand before flying the aircraft.the pilot must understand before flying the aircraft.

3. A copy of this operating manual must be in the aircraft at all times.3. A copy of this operating manual must be in the aircraft at all times.

3. A copy of this operating manual must be in the aircraft at all times.

3. A copy of this operating manual must be in the aircraft at all times.3. A copy of this operating manual must be in the aircraft at all times.

4. The placard reading "4. The placard reading "

4. The placard reading "

4. The placard reading "4. The placard reading " MINE THE FUEL LEVELS IN THE AIRCRAFTMINE THE FUEL LEVELS IN THE AIRCRAFT

MINE THE FUEL LEVELS IN THE AIRCRAFT

MINE THE FUEL LEVELS IN THE AIRCRAFTMINE THE FUEL LEVELS IN THE AIRCRAFT near the FL-2.near the FL-2.

near the FL-2.

near the FL-2.near the FL-2.

5. The FL-2 must be calibrated to the aircraft fuel system and its accuracy must be verified before flying5. The FL-2 must be calibrated to the aircraft fuel system and its accuracy must be verified before flying

5. The FL-2 must be calibrated to the aircraft fuel system and its accuracy must be verified before flying

the aircraft.

the aircraft.the aircraft.

If you ever find an inaccuracy issue or any other problem with the FL-2, cover the face of the instrumentIf you ever find an inaccuracy issue or any other problem with the FL-2, cover the face of the instrument

If you ever find an inaccuracy issue or any other problem with the FL-2, cover the face of the instrument

with a note saying "DEFECTIVE". This will alert anyone flying the aircraft to the condition of the FL-2.with a note saying "DEFECTIVE". This will alert anyone flying the aircraft to the condition of the FL-2.

with a note saying "DEFECTIVE". This will alert anyone flying the aircraft to the condition of the FL-2.

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT TO DETER-DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT TO DETER-

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT TO DETER-

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT TO DETER-DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT TO DETER-

" must be mounted on the aircraft instrument panel" must be mounted on the aircraft instrument panel

" must be mounted on the aircraft instrument panel

" must be mounted on the aircraft instrument panel" must be mounted on the aircraft instrument panel

ContentsContents

Contents

ContentsContents

arranty ...................................................................................arranty ...................................................................................

arranty ...................................................................................

arranty ...................................................................................arranty ...................................................................................

Operating Instructions ............................................................Operating Instructions ............................................................

Operating Instructions ............................................................

Operating Instructions ............................................................Operating Instructions ............................................................

Instrument: ....................................................................................................... 3

Analog Display: ................................................................................................ 3

Digital Display: ................................................................................................. 4

Accuracy Limitations: Important Considerations:

Installation Instructions ..........................................................Installation Instructions ..........................................................

Installation Instructions ..........................................................

Installation Instructions ..........................................................Installation Instructions ..........................................................

Important Information and Initial Check Out: ........................................................ 6

Route The Circular Connector: ......................................................................... 7

Route the Power and Ground Wires: ................................................................ 7

Route the Backlight Wires: ............................................................................... 7

Route the (Optional) External Warning Control Line: ..................................... 8

Route the Left and Right Fuel Tank Sensor Wires (FL-2RA-12 and -24 Only): 8

Route the Fuel Tank Ground Sensor Wire (FL-2R and FL-2RH Only): .......... 8

Install the Instrument in the Panel: ................................................................... 8

Connect the Circular Connector to the Instrument: .......................................... 8

Mount the Placard on the Instrument Panel: ..................................................... 8

Selecting the Proper Filter: ............................................................................... 9

Selecting the Proper Operating Mode: .............................................................. 9

Selecting the Resolution: .................................................................................. 9

Programming the Filter, Operating Mode and Resolution: .............................. 10

Calibration Issues: ............................................................................................ 11

Calibrate the Left Fuel Tank: ............................................................................ 12

Calibrate the Right Fuel Tank: ......................................................................... 15

(MUST READ) (MUST READ)

(MUST READ) ............................................................ 4

(MUST READ) (MUST READ)

(MUST READ) ...................................................... 5

(MUST READ) (MUST READ)

FLFL

-2RA-12 and FL-2RA-12 and FL

-2RA-12 and FL

FLFL

-2RA-12 and FL-2RA-12 and FL

FLFL

-2RA-12 and FL-2RA-12 and FL

-2RA-12 and FL

FLFL

-2RA-12 and FL-2RA-12 and FL

FLFL

-2CA Wiring Diagram ...........................................................-2CA Wiring Diagram ...........................................................

-2CA Wiring Diagram ...........................................................

FLFL

-2CA Wiring Diagram ...........................................................-2CA Wiring Diagram ...........................................................

FLFL

-2CA Circular Connector .....................................................-2CA Circular Connector .....................................................

-2CA Circular Connector .....................................................

FLFL

-2CA Circular Connector .....................................................-2CA Circular Connector .....................................................

Specifications and Operating FSpecifications and Operating F

Specifications and Operating F

Specifications and Operating FSpecifications and Operating F

echnical Notes .........................................................................echnical Notes .........................................................................

echnical Notes .........................................................................

echnical Notes .........................................................................echnical Notes .........................................................................

-2RA-24 Wiring Diagram .............................-2RA-24 Wiring Diagram .............................

-2RA-24 Wiring Diagram .............................

-2RA-24 Wiring Diagram .............................-2RA-24 Wiring Diagram .............................

-2RA-24 Circular Connector .......................-2RA-24 Circular Connector .......................

-2RA-24 Circular Connector .......................

-2RA-24 Circular Connector .......................-2RA-24 Circular Connector .......................

eatures ..................................eatures ..................................

eatures ..................................

eatures ..................................eatures ..................................

1616

1717

1818

1919

2020

2121

Warranty

1209921

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. Electronics International Inc. will repair or replace any item under the terms of this Warranty provided the item is returned to the factory prepaid.

l. 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 subjected to misuse, accident, incorrect wiring, negligence, improper or unprofessional assembly or improper installation by any person. ment for any person’s time for installation, removal, assembly or repair.ment for any person’s time for installation, removal, assembly or repair.

ment for any person’s time for installation, removal, assembly or repair. Electronics International retains the

ment for any person’s time for installation, removal, assembly or repair.ment for any person’s time for installation, removal, assembly or repair. 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 conjunction 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 responsible for shipping charges or damages incurred under this Warranty.

5. No representative is authorized to assume any other liability for Electronics International Inc. in connection with the sale of Electronics International Inc. products.

This warranty does not cover any reimburse-This warranty does not cover any reimburse-

This warranty does not cover any reimburse-

This warranty does not cover any reimburse-This warranty does not cover any reimburse-

If you do not agree to and accept the terms of this warranty, you may return the product in new condition,If you do not agree to and accept the terms of this warranty, you may return the product in new condition,

If you do not agree to and accept the terms of this warranty, you may return the product in new condition,

with receipt, within thirty (30) days for a refund.with receipt, within thirty (30) days for a refund.

with receipt, within thirty (30) days for a refund.

with receipt, within thirty (30) days for a refund.with receipt, within thirty (30) days for a refund.

This Warranty is made only to the original user. TIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY DISCLAIMS ALLTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY DISCLAIMS ALL

TIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY DISCLAIMS ALL

TIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY DISCLAIMS ALLTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL,PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL,

PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL,

PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL,PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE ORINCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR

INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR

INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE ORINCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DIS-OTHER ECONOMIC LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DIS-

OTHER ECONOMIC LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DIS-

OTHER ECONOMIC LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DIS-OTHER ECONOMIC LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTIONCLAIMS ALL OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION

CLAIMS ALL OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION

CLAIMS ALL OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTIONCLAIMS ALL OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-WITH THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-

WITH THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-

WITH THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-WITH THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFICALLY LIABILITY IN TORT.CALLY LIABILITY IN TORT.

CALLY LIABILITY IN TORT.

CALLY LIABILITY IN TORT.CALLY LIABILITY IN TORT. .

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN-THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN-

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN-

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN-THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN-

Operating InstructionsOperating Instructions

Operating Instructions

Operating InstructionsOperating Instructions

FL-2RA & FL-2CAFL-2RA & FL-2CA

FL-2RA & FL-2CA

FL-2RA & FL-2CAFL-2RA & FL-2CA

Instrument:Instrument:

Instrument:

Instrument:Instrument:

The FL-2 is a fuel level instrument featuring dual 90 degree analog displays and a digital display. These two displays provide the primary indication of the fuel level for the left and right wing tanks and offer many advantages over conventional analog gauges, as described below. The instrument may be calibrated to display in gallons, pounds or liters. If the FL-2 is calibrated for gallons, the instrument may be programmed to display in one or 1/2 gallon increments. For fuel levels above 99 gallons the FL-2 will display in one gallon increments only. Since the FL-2 does not incorporate any moving parts (needles, bearings, springs, etc.) there is little to go wrong or wear out.

The FL-2 has a programmed filter that effects how the instrument responds to changes in fuel level. The filter may be set to 8, 16, 32, 64 or 128 seconds response. In the installation section of this manual is a discussion of the advantages and disadvantages of the different filter settings.

The FL-2 connects to two fuel level sensors mounted in the left and right wing tanks. The FL-2RA-12 and FL-2RA-24 was designed to be used with resistive fuel level sensors that decrease or increases in resistance as fuel is added to the tank. The -12 is for a 12 volt system and the -24 is for a 24 volt system. The FL-2CA was designed to be used with E.I.'s capacitive fuel level sensors and it will operate on a 12 or 24 volt system.

Once the FL-2 is installed in the aircraft it must be calibrated to the aircraft fuel tanks and sensors by filling the tanks to predetermined fuel levels. You may use as few as two calibration points or as many as 9 points. This mapping of the tanks removes any non-linearity in the tanks and sensors.

Analog Display:Analog Display:

Analog Display:

Analog Display:Analog Display:

The dual 90 degree analog displays provide a quick reference of the left and right fuel levels. More precise information is provided in the digital display. An advantage of the analog display is its ability to emit a green, yellow or red light. With a quick glance you can determine if your fuel level is in the green, yellow, or red operating range. In addition the FL-2 provides the following warnings:

1/4 Tank Warning -1/4 Tank Warning -

1/4 Tank Warning - If the left or right tank level reaches 1/4 of a tank, the appropriate yellow LED will

1/4 Tank Warning -1/4 Tank Warning -

blink. This is intended to alert you that the fuel level is getting low.

Low Fuel -Low Fuel -

Low Fuel - If the left or right tank reaches 1/8 of a tank or 2 gallons (whichever is greater), the appropri-

Low Fuel -Low Fuel ate red LED will blink. This is intended to alert you that the fuel level is getting very low.

"OPEN" - "OPEN" -

"OPEN" - If the wire to the left or right fuel tank sensor becomes open, the analog display for the tank

"OPEN" - "OPEN" with the problem will show an empty and the digital display will show "OPEN." This warning is intended to alert you when the FL-2 has lost the signal from one or both of the fuel sensors.

Note:Note:

Note: To acknowledge a blinking LED (i.e., to stop the blinking), change the position of the Tank Selector

Note:Note:

Switch. Once a blinking warning is acknowledged it will not occur again until the FL-2's power has been

turned off and back on. Although these blinking warnings are valuable, they can be annoying. For this

reason we provide a way of shutting them off.

During night operation the analog LED's may be too bright. If so, turn the panel light rheostat up and the analog lights (LED's) will dim. If you wish to control the intensity of the LED's independent of the panel light rheostat, a LED Intensity Control Pot is available from Electronics International. The red LED's will always be displayed at full intensity.

Digital Display:Digital Display:

Digital Display:

Digital Display:Digital Display:

With the Tank Selector Switch in the left or right position the digital display will show the fuel level in the appropriate tank. With the Tank Selector in the center position the total fuel (left + right) will be displayed. Fuel levels below 2 gallons will be displayed as "0" in the left, right and total position.

If the digital display backlight has been permanently powered up (as recommended), the digital display will be easier to see during low ambient light conditions and at night.

On power-up the FL-2 performs the following tests in sequence:

1. The left tank's calibration data is check for errors. A table of error codes is provided in the calibration section of this manual. If an error is found, the appropriate error code is displayed and the FL-2 operation is stopped.

2. The right tank's calibration data is check for errors. If an error is found, the appropriate error code is displayed and the FL-2 operation is stopped.

3. A self test is performed, all the LED's are sequenced and "8888" is shown on the digital display.

***** MUST READ ********** MUST READ *****

***** MUST READ *****

***** MUST READ ********** MUST READ *****

Accuracy Limitations:Accuracy Limitations:

Accuracy Limitations:

Accuracy Limitations:Accuracy Limitations:

The accuracy limitations of the FL-2 are listed below.

flying the aircraft aware of these limitations.flying the aircraft aware of these limitations.

flying the aircraft aware of these limitations.

flying the aircraft aware of these limitations.flying the aircraft aware of these limitations.

1. Angle of Attack -1. Angle of Attack -

1. Angle of Attack - The FL-2 must be calibrated with the aircraft in a cruise angle of attack. If the aircraft

1. Angle of Attack -1. Angle of Attack is in a condition other than cruise, depending on the mounting location and type of sensor used, the FL-2 may display inaccurate fuel levels. If your aircraft does not sit at a cruise angle of attack when on the ground, it may not display accurate fuel levels.

what the effects are on the fuel level readings for the FL-2.what the effects are on the fuel level readings for the FL-2.

what the effects are on the fuel level readings for the FL-2.

what the effects are on the fuel level readings for the FL-2.what the effects are on the fuel level readings for the FL-2.

It is the pilot/owner's obligation to make anyoneIt is the pilot/owner's obligation to make anyone

It is the pilot/owner's obligation to make anyone

It is the pilot/owner's obligation to make anyoneIt is the pilot/owner's obligation to make anyone

Test your aircraft at different angles of attack and seeTest your aircraft at different angles of attack and see

Test your aircraft at different angles of attack and see

Test your aircraft at different angles of attack and seeTest your aircraft at different angles of attack and see

Full Fuel Readings -Full Fuel Readings -

Full Fuel Readings - As a tank is filled the fuel sensor may not be able to detect the fuel entering the

Full Fuel Readings -Full Fuel Readings upper corners of the fuel tank. If this is the case with your sensor, the FL-2 will display lower fuel levels

than the actual fuel in the tanks when the tanks are full. When the fuel level drops to a point where the fuel sensors start to detect a change, the displayed fuel level should be accurate.

comparing the displayed fuel levels on the FL-2 to the fuel levels listed in the flight manual at each fillcomparing the displayed fuel levels on the FL-2 to the fuel levels listed in the flight manual at each fill

comparing the displayed fuel levels on the FL-2 to the fuel levels listed in the flight manual at each fill

up.

up.up.

Check your system by Check your system by

Check your system by

Check your system by Check your system by

3. Low Fuel Readings -3. Low Fuel Readings -

3. Low Fuel Readings -

3. Low Fuel Readings -3. Low Fuel Readings -

levels below 1/8levels below 1/8

levels below 1/8. You should always fly the aircraft in such a manner as to at least maintain the FAA

levels below 1/8levels below 1/8

minimum fuel requirements in the aircraft at all times.

sensor used, the FL-2 may not be able to accurately measure the last few gallons of fuel in the tanks.sensor used, the FL-2 may not be able to accurately measure the last few gallons of fuel in the tanks.

sensor used, the FL-2 may not be able to accurately measure the last few gallons of fuel in the tanks.

4. Improper Calibration -4. Improper Calibration -

4. Improper Calibration - If the FL-2 has not been properly calibrated it will not display accurate fuel levels

4. Improper Calibration -4. Improper Calibration in the tanks. It is important you verify the accuracy of the FL-2.

fuel levels in the tanks with the readings on the FL-2 before each flight.fuel levels in the tanks with the readings on the FL-2 before each flight.

fuel levels in the tanks with the readings on the FL-2 before each flight.

fuel levels in the tanks with the readings on the FL-2 before each flight.fuel levels in the tanks with the readings on the FL-2 before each flight.

5. Poor Connections -5. Poor Connections -

5. Poor Connections - Poor connections in the wires leading from the FL-2 to the fuel sensors can become

5. Poor Connections -5. Poor Connections intermittent with age. An intermittent connection will most likely show up as wandering or inaccurate readings on the FL-2.

the FL-2 before each flight.the FL-2 before each flight.

the FL-2 before each flight.

the FL-2 before each flight.the FL-2 before each flight.

6. Defective Fuel Level Sensors -6. Defective Fuel Level Sensors -

6. Defective Fuel Level Sensors - Fuel sensors can become intermittent or change resistance with age. It

6. Defective Fuel Level Sensors -6. Defective Fuel Level Sensors is not uncommon to find intermittent problems even in new sensors. We recommend Stewart Warner F385-CP05 resistive sensors be used with the FL-2RA. An intermittent problem with a fuel sensor will most likely show up as wandering or inaccurate readings on the FL-2.

fuel levels in the tanks with the readings on the FL-2 at each fill up.fuel levels in the tanks with the readings on the FL-2 at each fill up.

fuel levels in the tanks with the readings on the FL-2 at each fill up.

fuel levels in the tanks with the readings on the FL-2 at each fill up.fuel levels in the tanks with the readings on the FL-2 at each fill up.

If you ever find an inaccuracy issue or any other problem with the FL-2, cover the face of the instrument

with a note saying "DEFECTIVE". This will alert anyone flying the aircraft to the condition of the FL-2.

Do not rely on the FL-2 to determine the fuel in the tank for indicated tankDo not rely on the FL-2 to determine the fuel in the tank for indicated tank

Do not rely on the FL-2 to determine the fuel in the tank for indicated tank

Do not rely on the FL-2 to determine the fuel in the tank for indicated tankDo not rely on the FL-2 to determine the fuel in the tank for indicated tank

Depending on the mounting location and type ofDepending on the mounting location and type of

Depending on the mounting location and type of

Depending on the mounting location and type ofDepending on the mounting location and type of

Always cross check your measuredAlways cross check your measured

Always cross check your measured

Always cross check your measuredAlways cross check your measured

Always cross check your measured fuel levels in the tanks with the readings onAlways cross check your measured fuel levels in the tanks with the readings on

Always cross check your measured fuel levels in the tanks with the readings on

Always cross check your measured fuel levels in the tanks with the readings onAlways cross check your measured fuel levels in the tanks with the readings on

Always cross check the measuredAlways cross check the measured

Always cross check the measured

Always cross check the measuredAlways cross check the measured

***** MUST READ ********** MUST READ *****

***** MUST READ *****

***** MUST READ ********** MUST READ *****

Important Considerations:Important Considerations:

Important Considerations:

Important Considerations:Important Considerations:

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT (FL-2) TO DETERMINE THEDO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT (FL-2) TO DETERMINE THE

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT (FL-2) TO DETERMINE THE

DO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT (FL-2) TO DETERMINE THEDO NOT SOLELY RELY ON THE FUEL LEVEL INSTRUMENT (FL-2) TO DETERMINE THE

FUEL LEVELS IN THE AIRCRAFTFUEL LEVELS IN THE AIRCRAFT

FUEL LEVELS IN THE AIRCRAFT

FUEL LEVELS IN THE AIRCRAFTFUEL LEVELS IN THE AIRCRAFT pilot to use good flight planning, preflight and in-flight techniques for managing fuel.pilot to use good flight planning, preflight and in-flight techniques for managing fuel.

pilot to use good flight planning, preflight and in-flight techniques for managing fuel. It is important the pilot

pilot to use good flight planning, preflight and in-flight techniques for managing fuel.pilot to use good flight planning, preflight and in-flight techniques for managing fuel. adopt the practices listed below. If you are not familiar with these techniques, contact the FAA to acquire proper training.

1. 1.

A copy of this operating manual must be in the aircraft at all times.A copy of this operating manual must be in the aircraft at all times.

A copy of this operating manual must be in the aircraft at all times.

1. 1.

A copy of this operating manual must be in the aircraft at all times.A copy of this operating manual must be in the aircraft at all times.

2. Flight Planning -2. Flight Planning -

2. Flight Planning - Always calculate the fuel requirement for each leg of the flight including any alternate

2. Flight Planning -2. Flight Planning plans for bad weather. Keep this information available in the aircraft during the flight. Keep a chart of the published fuel flows for various flight/engine conditions in the aircraft. Keep a chart of the measured fuel flows for various flights in the aircraft. Measured fuel flows can be considerably different from published figures. This is usually due to old inaccurate engine instruments.

The use of the FL-2 does not eliminate or reduce the necessity for the The use of the FL-2 does not eliminate or reduce the necessity for the

The use of the FL-2 does not eliminate or reduce the necessity for the

The use of the FL-2 does not eliminate or reduce the necessity for the The use of the FL-2 does not eliminate or reduce the necessity for the

3. Preflight - Do not rely on the FL-2 to determine the fuel level in the fuel tanks. The pilot must3. Preflight - Do not rely on the FL-2 to determine the fuel level in the fuel tanks. The pilot must

3. Preflight - Do not rely on the FL-2 to determine the fuel level in the fuel tanks. The pilot must

visually check/measure the fuel levels in the tanks before every takeoff.visually check/measure the fuel levels in the tanks before every takeoff.

visually check/measure the fuel levels in the tanks before every takeoff. Cross-check the measured fuel

visually check/measure the fuel levels in the tanks before every takeoff.visually check/measure the fuel levels in the tanks before every takeoff. levels with the displayed levels on the FL-2. Also, crosscheck these levels with the fuel requirements for the flight listed in your flight plan.

4. In Flight -4. In Flight -

4. In Flight - Make the FL-2 part of your normal instrument scan.

4. In Flight -4. In Flight on FL-2 with your flight plan at each leg of the flight or every 30 minuteson FL-2 with your flight plan at each leg of the flight or every 30 minutes

on FL-2 with your flight plan at each leg of the flight or every 30 minutes (if a leg is longer than 30

on FL-2 with your flight plan at each leg of the flight or every 30 minuteson FL-2 with your flight plan at each leg of the flight or every 30 minutes

minutes). Calculate the fuel flows from the FL-2 displayed fuel levels and compare them with your charts of measured and published fuel flows for the aircraft. If there is a discrepancy, land the aircraft at the nearest airport and verify the fuel levels.

5. New Pilot or Owner of the Aircraft -5. New Pilot or Owner of the Aircraft -

5. New Pilot or Owner of the Aircraft -

5. New Pilot or Owner of the Aircraft -5. New Pilot or Owner of the Aircraft aircraft pilot/owner's responsibility to insure the new pilot has read this manual and is aware of theaircraft pilot/owner's responsibility to insure the new pilot has read this manual and is aware of the

aircraft pilot/owner's responsibility to insure the new pilot has read this manual and is aware of the

aircraft pilot/owner's responsibility to insure the new pilot has read this manual and is aware of theaircraft pilot/owner's responsibility to insure the new pilot has read this manual and is aware of the accuracy limitations and other important considerations. All limitations and operating characteristicsaccuracy limitations and other important considerations. All limitations and operating characteristics

accuracy limitations and other important considerations. All limitations and operating characteristics

accuracy limitations and other important considerations. All limitations and operating characteristicsaccuracy limitations and other important considerations. All limitations and operating characteristics learned from operating the FL-2 must be passed on to the new pilot/owner.learned from operating the FL-2 must be passed on to the new pilot/owner.

learned from operating the FL-2 must be passed on to the new pilot/owner.

learned from operating the FL-2 must be passed on to the new pilot/owner.learned from operating the FL-2 must be passed on to the new pilot/owner.

Installation InstructionsInstallation Instructions

Installation Instructions

Installation InstructionsInstallation Instructions

Important Information and Initial Check Out:Important Information and Initial Check Out:

Important Information and Initial Check Out:

Important Information and Initial Check Out:Important Information and Initial Check Out:

Discrepancies should be taken seriously.

If there is a new pilot or owner of the aircraft, it is the previousIf there is a new pilot or owner of the aircraft, it is the previous

If there is a new pilot or owner of the aircraft, it is the previous

If there is a new pilot or owner of the aircraft, it is the previousIf there is a new pilot or owner of the aircraft, it is the previous

FL-2FL-2

FL-2

FL-2FL-2

Cross-check the fuel levels displayedCross-check the fuel levels displayed

Cross-check the fuel levels displayed

Cross-check the fuel levels displayedCross-check the fuel levels displayed

The installer and aircraft owner must read the Warranty before starting the installationThe installer and aircraft owner must read the Warranty before starting the installation

The installer and aircraft owner must read the Warranty before starting the installation. There is

The installer and aircraft owner must read the Warranty before starting the installationThe installer and aircraft owner must read the Warranty before starting the installation

information in the Warranty that may alter your decision to install this instrument.

the terms of the Warranty, do not install this instrument.the terms of the Warranty, do not install this instrument.

the terms of the Warranty, do not install this instrument.

the terms of the Warranty, do not install this instrument.the terms of the Warranty, do not install this instrument.

2. If you are not an FAA Certified Aircraft Mechanic familiar with the issues of installing aircraft fuel2. If you are not an FAA Certified Aircraft Mechanic familiar with the issues of installing aircraft fuel

2. If you are not an FAA Certified Aircraft Mechanic familiar with the issues of installing aircraft fuel

level instruments,

level instruments, level instruments,

3. Read the entire Installation Instructions and resolve any issues you may have before starting the installa-

tion. This may eliminate any delays once the installation is started.

THIS INSTALLATION MAY REQUIRE SOME PARTS UNIQUE TO YOUR AIRCRAFT THATTHIS INSTALLATION MAY REQUIRE SOME PARTS UNIQUE TO YOUR AIRCRAFT THAT

THIS INSTALLATION MAY REQUIRE SOME PARTS UNIQUE TO YOUR AIRCRAFT THAT

THIS INSTALLATION MAY REQUIRE SOME PARTS UNIQUE TO YOUR AIRCRAFT THATTHIS INSTALLATION MAY REQUIRE SOME PARTS UNIQUE TO YOUR AIRCRAFT THAT ARE NOT SUPPLIED IN THE KIT.ARE NOT SUPPLIED IN THE KIT.

ARE NOT SUPPLIED IN THE KIT. Acquire all the parts necessary to install this instrument before

ARE NOT SUPPLIED IN THE KIT.ARE NOT SUPPLIED IN THE KIT.

starting the installation.

5. Check that the instrument make and model are correct before starting the installation. The FL-2RA-12 is

for a 12 volt system and a resistive probe, the FL-2RA-24 is for a 24 volt system and a resistive probe and the FL-2CA is for E.I.'s capacitive probe.

6. Before starting the installation make sure the unit will fit in the location you intend to install it without

obstructing the operation of any controls.

Do Not attempt to install this instrument.Do Not attempt to install this instrument.

Do Not attempt to install this instrument.

Do Not attempt to install this instrument.Do Not attempt to install this instrument.

If you do not acceptIf you do not accept

If you do not accept

If you do not acceptIf you do not accept

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