LSK FuelGaugePro2 User manual

User manual
LSK FuelGaugePro2
Digital Universal Floatless Fuel gauge
Thank you for showing interest in our products. I strongly advise you to read this user
manual thoroughly. It contains important instructions about installation, setup and use of the
gauge. By obeying these instructions, the product will reward you with long time flawless
functionality.
Rev. 1.3, ate: 28.5.2018
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Content
Device desctription..............................................................................................................................2
Main features...................................................................................................................................3
Package contents..............................................................................................................................4
Technical specifications...................................................................................................................4
Answers on FA ..............................................................................................................................4
Usage restrictions.............................................................................................................................5
Fuel Pump: External Fuel Pump: Fuel Tank Air Intake: ............................................5
Device mounting..................................................................................................................................6
Find a suitable place for the sensor .................................................................................................6
The best fuel gauge sensor placement.........................................................................................6
Placement with the external fuel pump.......................................................................................7
The fuel gauge sensor alternative placement..............................................................................8
Electrical parts connection ..............................................................................................................9
Connect the gauge to the fuel hose ...............................................................................................10
Fuel gauge setup ................................................................................................................................10
Measuring modes...........................................................................................................................10
Device settings...............................................................................................................................10
1) Calibration settings...............................................................................................................10
2) Display settings.....................................................................................................................11
3) Restore Default.....................................................................................................................12
Setup button...................................................................................................................................12
Enter to the setting menu...............................................................................................................13
The settings diagram.....................................................................................................................14
Examples of various settings.........................................................................................................15
Basic use (Min/max mode).......................................................................................................15
Autocalibration mode................................................................................................................15
Enable dot mode and disable blinking of first led....................................................................16
Restore default..........................................................................................................................16
Possible faults................................................................................................................................16
Warranty period............................................................................................................................17
Safety warnings..............................................................................................................................17
Recycling.......................................................................................................................................18
Manufacturer .................................................................................................................................18
Device desctription
This device is useful for a motorcycles (and ultralight aircrafts, excavators, tractors etc.)
without the built-in float in the tank. LSK FuelGaugePro2 is easy to setup for a wide range of fuel
tanks. It's function is based on measuring of the hydrostatic pressure of the fuel. Advantage of this
principle is minimal installation intervention (no need to make any holes into the fuel tank). Fuel
gauge is connected to the fuel hose via supplied T-shape plug. Fuel Gauge device is divided into
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two units, sensor unit and display unit. The universal fuel gauge must be calibrated before using.
The working principle not allows to connect the gauge to hose, into which the fuel is drawn by the
fuel pump.
•It cannot be used on bikes without on-board battery. The electricity from the generator is too
unstable, causing the protection to shut down the gauge.
•The gauge is connected to the fuel hose from the tank using a plastic T-shape three way
connector. It must be placed really under the fuel tank.
•The fuel gauge does not work when it is connected to a pipe, into which the fuel is delivered
by a fuel pump (It can be used if the motorbikes is equipped with some types of external
fuel pump, it is explained in this document below).
•If the fuel gauge is connected under a vacuum controlled fuel cock, that needs to work just
fine and not remain partially closed.
•It only works on bikes with a 12 volt electrical system. It does not work on 6 volts. This can
be solved by a 6V/12V converter that can be purchased in our website. In case of need, we
will help with any uncertainties.
•It can be used on other machines, including diesel powered, like tractors, excavator etc.
•The fuel tanks with fuel evaporation control (Active charcoal filter) may cause problems
with hydrostatic measurement principle.
Main features
•Floatless sensing
•Calibration modes: Auto-calibration, manual calibration
•Minimalized dimensions
•12 displaying LED segments
•Selectable Dot/bar displaying modes
•Enable/disable low fuel indication LED flashing
•Adaptive LED brighness with built-in ambient light sensor
•Magnetic button for device setup
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Package contents
✔FuelGaugePro sensor unit
✔LED display unit
✔Permanent magnet for setup
✔Fuel hose for connecting to the fuel system
✔Plastic pipe T shape three way quick connector ø6mm
✔Plastic pipe T shape three way quick connector ø8mm
✔Clips for securing the fuel hoses
✔Set of plastic ties
✔Double-sided adhesive tape
✔Cut in connectors for easy supply voltage connection
✔Ring tongue terminal for grounding
✔Autocalibration hose nozzle
✔This user manual
✔uickStart Guide
Technical specifications
Supply voltage: Nominal 12 V (Range: 10 V – 15 V)
Energy consumption: Max. 1 W
Max. fuel level height: 90 cm (distance from the sensor to level of full fuel tank)
Sensor dimensions: X: 35 mm, Y: 40 mm, Y: 20 mm (without hose plug)
(X: 1.37 in, Y: 1.57 in, Y: 0.78 in) (without hose plug)
Display dimensions: X: 52 mm, Y: 35 mm, Z: 16 mm
(X: 2.04 in, Y: 1.37 in, Z: 0.62 in)
Answers on FAQ
•The gauge is not affected with fall of the bike on the ground.
•The fuel gauge has linear measuring. Every bar means a twelfth of the amount of fuel or a
twelfth of the pressure generated by the fuel. The showed decline in the fuel amount is
therefore absolutely steady.
•The gauge doesn't lose its memory after being disconnected from power. The data is stored
in a FLASH memory that can last years without power.
•The gauge or the sensor do not suffer in rough environment. The terrain change
compensation will work very well here too.
•Even when the gauge is broken, the motorcycle can't be affected by this – only if you rip
your fuel hose off and the fuel starts to leak.
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Usage restrictions
Fuel Pump: External Fuel Pump: Fuel Tank Air Intake:
CAUTION: We cannot guarantee the correct function on all motorcycles with a fuel pump. The
external fuel pump may cause problems with measuring on some motorcycles. If this problem
occurs, you can return FuelGauge to us and we will return your money back to you. Device must be
in intact condition.
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Device mounting
Find a suitable place for the sensor
It can be over or under the fuel tank. It is better to mount it under the fuel tank and fill the
hose up with fuel. This will make the gauge the most accurate.
•Do not place the unit on hot places. It can handle temperature up to 60°C(140°F).
•Check, if the display can reach your desired spot (if the cable is long enough).
•If you can, connect the gauge to the hose between the fuel tank and the fuel cock (not
necessary, see picture below).
•The sensor unit can be in any position (lying or even with the fuel hose going up).
T e best fuel gauge sensor placement
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Placement wit t e external fuel pump
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T e fuel gauge sensor alternative placement
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Electrical parts connection
Pressure sensor: See previous chapter „Find a suitable place for the sensor “.
Display: Pick a suitable place and secure it. If you decide to use tape, clean the surface before
mounting the display (using degreasing agent – ethanol or other).
Supply leads: Connect over the ignition switch, then the gauge will be switched on together with
the ignition key.
(-) Black cable: The best way to connect the (-) pole is to use the ring tongue terminal and
screw it on some place of the frame, or even to the (-) pole of the battery. It can be also attached to
any other (-) wire (usually black) using the cut in connector included in the package, but you must
be 100% sure it is a (-) wire.
(+) Red cable: Use the cut in connector to connect it to another (+) cable that is switched on
with the ignition. You can observe that by trying the gauge with its (+) cable on (+) cable of the
motorcycle, while switching the ignition key on and off. It is always better however to leave this to
a trained technician, who will do it professionally. This will prevent future problems with supply
voltage, because cut in connector doesn't ensure 100% durable contact.
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Connect the gauge to the fuel hose
Connection should be made according to the two pictures on previous page. Do not forget to
secure the hoses with the clips included in the package. Check the system for any fuel leaks after a
few kilometres and also after longer distances periodically. If everything is right and the gauge
works, you may proceed to the setup.
Fuel gauge setup
Measuring modes
Min max mode: This mode is usable for easy and quick calibration. For this mode is
required to measure only 2 fuel levels, minimal level and full fuel level. The LED segments lights
in linear dependence on fuel level (height of fuel in the tank).
Auto-calibration mode: In this mode, the device is displaying real amount of the fuel even
if the fuel tank shape is very varied. This mode is more difficult to set than "min/max" mode.
Device settings
1) Calibration settings
Empty tank level: Save this value when fuel tank is empty. Set this value when min/max
mode will be used.
Full tank level: Save this value when fuel tank is full. Set this value when min/max mode
will be used.
Auto-calibration process (experimental):
1) Fuel tank must be full. Prepare a jerry can for leaking fuel during calibration.
2) Remove the tank cap.
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3) Insert "calibration nozzle" into fuel hose under T-shape fuel connector and insert it
into the jerry can.
4) Prepare Auto-calibration with setup button (settings menu diagram is in next chapter)
5) Open fuel cock and wait a few seconds
6) Start Auto-calibration process by setup button (by confirming menu item)
7) Autocalibration process will be automatically terminated when the fuel level reached
the fuel cock. It can be terminated maually by magnet button too. (manually minimal
fuel level finding)
8) Calibration is complete.
Measure mode: This settings is useful for set measure mode. If calibration menu was
opened, mode has to be set considering with used mode.
Note for bikes with VACUUM FUEL COCK :
uring the calibration, the engine should be running (the vacuum fuel cocks must be opened),
the motorcycle should stand straight (not on emergency stand) and both the control unit and the
fuel tank must be in their final position.
2) Display settings
Bar dot mode: The display is set to bar mode by default. Change displaying mode to dot
mode is possible in the settings. Difference between showing the same fuel level in bar mode and
dot mode is shown bellow.
Flashing first LED: Flashing is suitable for better warning of low fuel level. The display is
set to flashing mode by default. Flashing can be disabled in settings.
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ot mode
Bar mode

Reverse display: With this settings, the order of LEDs can be reversed. Different between
normal and reverse mode of displaying a same fuel level is drawn below.
3) Restore Default
Confirming this setup item restores device settings to default. Caution ! All saved settings
and calibration data will be lost !
etup button
Setup button is located in the right corner of display. It is magnetic sensor responsive to the
proximity of the magnet (magnet is enclosed in the package). The test of the magnetic sensor can be
performed by placing a magnet near the sensor. If device is not in the settings mode (normal mode),
all LED segments will be lighted when magnet is detected.
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Normal direction Reverse direction

Enter to the setting menu
The menu is entered by holding the magnet near the sensor for ca. 2 seconds. Menu entering
is confirmed by display double flashing. After double flashing event, first item from the main menu
is active. The settings diagram is explained in the following chapter.
For browsing the menu exists two events, first event is called "click" and second one is
called "confirm".
C l i c k: Click event is primary usable for skipping items in the menu. "Click" is performed
by to proximity the magnet to the magnetic sensor for a short time and get it out.
C o n f i r m: Confirm event is usable for confirming items in the menu (change the default
value, to perform calibration etc.). Confirm event is performed by to proximity the magnet to the
magnetic sensor for time longer than ca. 2 seconds.
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The settings diagram
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CLICK CLICK
Cal ibrati on secti on Di splay set ting s Res tore defau lt
EXI T
CONFIRM CONFIRM CONFIRM ! ! ! )
CLICK
FACTORY RESET
all data is default !)
Min-max mode)
Chosing measur e mode)
Min-max mode)
Empt y tan k level
CONFIRM:
Save empty
tank level
Bar/dot showing mode
CONFIRM:
Dot mode
CLICK:
Bar mode
CLICK:
Fu ll tank level
CONFIRM:
Save full
tank level
CLICK:
F lashing f irs t LED
CONFIRM:
Not flashing
CLICK:
Flashing
Measure mode ! )
CONFIRM:
Min-max mode
CLICK:
AutoCal mode
Reverse di splay
CONFIRM:
Reverse
CLICK:
Normal
Autocal ibrati on
proces s
CONFIRM:
Start AutoCalibration,
AutoCal measure mode
enabled automatically
CLICK:
EXI T
CLICK ! ) in process):
MANUALLY STOP
manually minimum value found )
EXI T
EX T
EXI T
Star t mode)

Examples of various settings
Some examples of the basic settings for fuel gauge with short notes. Useful for fast using
FuelFaugePro2.
Basic use (Min/max mode)
It's required prepared and connected device to the fuel system, fuel tank must be empty in
this example.( The fuel tank may be full or empty, it depends on order of saving fuel levels. The
calibration menu must be opened two times for reverse order of saving fuel level values)
•Holt magnet near sensor for time more than 2 sec. (enter to the settings menu)
•Confirm ( Enter to the calibration menu)
•Confirm ( Save value of the empty fuel tank) – The fuel tank must be empty
•Confirm ( Save value of the full fuel tank) – The fuel tank must be full
•Confirm ( Set mode: Min/max mode)
•Click ( Skip auto-calibration item)
•Settings menu is closed
Autocalibration mode
It is required prepared and connected device to the fuel system and fuel tank must be full
before auto-calibration.
•Holt magnet near sensor for time more than 2 sec. (enter to the settings menu)
•Confirm ( Enter to the calibration menu)
•Click ( Skip item: min value)
•Click ( Skip item: max value)
•Click ( Set mode: Calibration mode)
•Confirm ( The calibration process has been started, immediately after that, fuel hose must
be released and fuel must be leaking to the prepared container through calibration nozzle.)
•( PTI NAL) Click ( If fuel tank is "empty", this value will be remembered as level of
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empty fuel tank.)
•The calibration process should be self terminated if fuel tank is empty. If not, manually
termination by clicking is possible.
•Settings menu is closed
Enable dot mode and disable blinking of first led
•Holt magnet near sensor for time more than 2 sec. (enter to the settings menu)
•Click ( Skip the calibration menu)
•Confirm ( Enter to the display settings menu)
•Confirm ( Enable dot mode)
•Confirm ( isable first LE blinking)
•Click ( Enable direct LE order)
•Settings menu is closed ( evice is in the measure mode)
Restore default
•Holt magnet near sensor for time more than 2 sec. (Enter to the settings menu)
•Click ( Skip the calibration menu)
•Click ( Skip the display settings menu)
•Confirm ( Restore default settings)
Possible faults
If you obey all the instructions, this fuel gauge should work properly without any need to
change settings or any other problems. In case of any problems, feel free to contact us at
[email protected].
–If the gauge doesn’t show anything on the display, check out all the connections of the
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device.
–If the gauge flash at start but then doesn’t show anything, try checking the fuel system
(connection, fuel cock on/off).
–If the gauge shows nonsense and is calibrated correctly, try checking, if you filled up the
fuel hoses like explained on "Device mounting"chapter.
–Wrong data display is may be caused by dirty fuel pipes or just marginally opened fuel cock.
In case of problems, try to check for the fuel hose damage. This fault is often represented by
the amount of fuel depending on engine revs. It is not probably that the pressure sensor
should fail. If sensor module is wrong (but connections is ok), display shows one lighted
LED which goes forward and backward.
–If nothing helps, write at [email protected] and request money return.
Warranty period
Warranty is guaranteed for two years after the day of purchase. We provide warranty and
post-warranty service. If you don't obey instructions in this user manual, warranty can be
rejected.
Safety warnings
–The gauge should be installed by a trained people or by a service. Inproper installation of
fuel hoses can cause the fuel to leak and a fire. This can damage the motorcycle and the
owners health.
–Improper electrical connection can cause damage of this and other electrical devices on the
bike.
–Keep away from children.
–Not approved for the use on public roads. Use only at owners own danger.
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Recycling
Worn out (broken) device should be handed to authorities on places designed for
collecting old electrical devices. Packaging should be thrown out into an appropriate
bin.
Manufacturer
LSK Motorcycle electronics
Website: www.lskelectronics.com
Manufactured in compliance with RoHS norm.
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