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how can i calibrate fmb920 for analog fuel sensor wire?i have attached the connection but all i get is 173 regardless of diff fuel levels

1 Answer

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by
Hello,

Analogue fuel level sensor positive wire schould be connected to analog input AIN1 of FMB920. Voltage (in mV) on that input will be send as AVL ID 9 (Analog input 1).

Example connection:

https://wiki.teltonika-gps.com/view/FMB920_Accessories

Regards
by
Why is my mv stuck at 173 but i have not emptied my tank .It had like 8 litres then i added 10 litres but it just jumped to 853 then back and stuck at 173
by
Hello,

Please measure voltage on Analogue input 1 with voltometer and compare it with device's reading
by
Shows 0.6-0.7 volts
by
Hello,

Thank you for your answer

Please provide device firmware version, you can check it in the configurator or with getver SMS command:

https://wiki.teltonika-gps.com/view/FMB_getver
by
Any update on this matter? I'm exactly in the same situation with an FMC130 with firmware 3.27.13 Rev54.  I have tried both AIN1 & AIN2 with IO set to Low priority, I have checked with a multimeter and confirmed I am receiving the correct mV values from the fuel sensor but the tracker is stuck reading 173.

Any Ideas?

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Update on this matter....I found out that the tracker´s harness sometimes have an issue, pins for certain cables are pushed back rather that properly connecting (making contact). I disconnected and reconnected the harness to the cable and wiggled the connector a few times and finally got the correct reading from the fuel sensor.

Hopefully Teltonika can use this info to improve the harness manufacturing process.

Regards