Teltonika FM6320, Руководство пользователя, Страница: 20 / 139

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Figure 8 Digital key “I-Button” DS1990A connection scheme
Fuel tank sensors
A fuel tank level sensor exists in most of the cars,
which shows the approximate fuel level in the driver’s
indicator panel. It is possible to connect FM6320 Analog
input (if sensor returns analogue signal proportional to
fuel level). Figure describes the connection scheme to
the FM6320 and fuel tank sensor. After the connection
to the tank fuel level sensor, calibration is needed.
Calibrations needed due of the fact that most fuel tank
sensors are not linear. Calibration is being performing
by measuring voltage dependence on volume of fuel in
tank.
Figure 9 Fuel sensor scheme