FMB130 analog input reading issue

TELEMATICS
1

why does analog inputs read some millivolt without connecting it?

2

Hi Natnael,

Good day, these millivolts are electrical noise.

Regards,

3

how can i resolve it? because these millivolt affect the fuel level reading.

4

Hi,

Good day, Analog Input error margin can increase if temperature varies, this is already a hardware limitation to get the accurate fuel reading you can use CAN adapter or Fuel level sensor.

Reference: FMB130 General description - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)

Regards,

5

Hello
we are using FMB140 for Truckers that support CAN but other vehicles don’t have, so we use the vehicle fuel sensor previously existed and connect it to analog input.
question1
when you say fuel level sensor, do you a new one by drilling the fuel tank?

Regards,

6

Hi,

This means you are using analog fuel level sensor - Analog Fuel Sensor - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)
Since this is analog error margin is expected, calibration precision, and environmental conditions ( Hot or Cold Temperature ), all of which can introduce variations in resistance measurements and impact the accuracy of fuel level readings.

When you say fuel level sensor, do you a new one by drilling the fuel tank?

Yes, For example, you can use a fuel level sensor that connects thru Bluetooth:

  1. Technoton DUT-E S7 Fuel Level Sensor - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)

  2. Fuel level sensor Escort TD-150 BLE - FMeter.ru

or via Serial Communication Port ( RS232/485 ) In this case you need to use FMX125 or FMX640
You can find any fuel level sensor from any third-party vendor and check if they support the LLS protocol

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To know more about RS232/485 please click here : FMB125 RS-232 and RS-485 - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)

Best Regards,
Maynard C.

1 Like
7

Thanks for your information @Maynard

1 Like