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Typically, the fuel sending wire will come from a multiple wire connector along with all the other dashboard inputs.
Typically, the fuel sending wire will come from a multiple wire connector along with all the other dashboard inputs.
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- With no manual, wires coming from the fuel gauge have to be tested by measuring their current, then reducing the amount of fuel in the fuel tank and then measuring '''current''' again. The wire that has reduced '''current''' in response to less fuel is the fuel sender wire. All the wires have to be measured between each change in fuel level. The fuel sending wire is typically red or pink, but this is not guaranteed to be true
- With no manual, wires coming from the fuel gauge have to be tested by measuring their '''current''', then reducing the amount of fuel in the fuel tank and then measuring '''current''' again. The wire that has reduced '''current''' in response to less fuel is the fuel sender wire. All the wires have to be measured between each change in fuel level. The fuel sending wire is typically red or pink, but this is not guaranteed to be true
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- A more direct way of finding the fuel sending wire is to take out fuel sensor from the fuel tank and move the floating arm from full to empty while measuring the current of the wires. This should be done with electronics on and without ignition (key in ACC position). Fuel tank should also be empty for safety reasons, and trying to turn ignition on in this situation is likely to damage internal components.
- A more direct way of finding the fuel sending wire is to take out fuel sensor from the fuel tank and move the floating arm from full to empty while measuring the current of the wires. This should be done with electronics on and without ignition (key in ACC position). Fuel tank should also be empty for safety reasons, and trying to turn ignition on in this situation is likely to damage internal components.
==Connecting and calibrating==
==Connecting and calibrating==
[[File:Connection example.png|frame|Connection example]]
[[File:Connection example.png|frame|Connection example]]
- When you have found the fuel sending wire, simply connect the tracker to the wire using the Analog Input (AIN) wire from the device.
- When you have found the fuel sending wire, simply connect the tracker to the wire using the Analog Input (AIN) wire from the device.
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* Afterwards press the refresh button. Voltage will be filled in automatically. Continue by filling in around 5-10% more of fuel tank with the engine off. Turn the engine on and wait around 30sec.
* Afterwards press the refresh button. Voltage will be filled in automatically. Continue by filling in around 5-10% more of fuel tank with the engine off. Turn the engine on and wait around 30sec.
* More measurements would provide more accurate readings later on. You can track voltage in Status > I/O tab to see how it fluctuates at any given moment.
* More measurements would provide more accurate readings later on. You can track voltage in Status > I/O tab to see how it fluctuates at any given moment.
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- Voltages must increase or decrease consistently. If the voltage values go up and down between the different levels of fuel, you will need to find the issue before continuing.
* On the basis of gathered data in table format, export it to file (there is button at the bottom).
* Insert data to the software, where voltage coming from Teltonika tracking unit will be converted to liters (more details can be provided by your software supplier).
==Teltonika Configurator==
For LLS calibration go to Maintenance under the status menu (NOTE: the status menu appears only when the FM device is physically connected to your computer)
Here you can choose which Analog input you will use for data reading, enter the current amount of fuel, add and remove rows.
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Table is filled row by row. Each row represents one fuel tank fill. To calculate constants it is needed to select a sensor from "''Available sensors''", and fill "''Fuel L''" column and capture current value of a sensor by clicking "''Refresh''" button. Then the next value in liters should be entered by user and so on.
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When table is filled, calculated a0, a1, a2 and a3 values should be seen.
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To add a new tank fill row "''Add row''" must be clicked. "''Clear rows''" is for clearing all the rows. By clicking "''Export''" data will be exported to .csv file. To recalculate polynom "''Calculate''" must be clicked. Clicking "-" on the selected row will remove the row.
[[File:Full Blur.gif]]
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'''Turning on the I/O element'''
After the tracker has been connected and calibrated, the I/O element responsible for sending the fuel data (Analog Input 1) must be turned on.
To do that, go to I/O elements and select Analog Input 1 to Low/High priority. The Operand of the I/O element should be left as Monitoring.
You will see changes in fuel level expressed by the equivalent voltage read from the fuel sender wire to the Analog Input of your Teltonika device.
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[[File:IO elements LLS.png]]