- 19 -
UTRACK MVT600 User Guide Version 3.0
Copyright © 2013 Extra Miles Solutions Pte Ltd. All rights reserved.
7.1.4 Output
7.1.5 Analog Input
7.1.5.1 Analog Input Application 1– Detect External Power Voltage
Input range
：
0-6V
Voltage Caculating Formula: input voltage=(AD*3.3*2)/4096
0x0C9B=>3227(decimal)=>(3227*3.3*2)/4096=5.1997V(voltage)
0x0D9D=>3845(decimal)=>(3845*3.3*2)/4096=5.6154V(voltage)
7.1.5.2 Analog Input Application 2 – Fuel Detection (percentage of fuel)
Note:
Fuel level sensors supplied by us are resistance-type sensors with output resistance: 0-200Ω (ohm).
For the circuit shown on above figure, if VCC is 12V, R should be 200Ω (ohm) and if VCC is 24V then R should
be 600Ω (ohm) to make the input range to AD1 or AD2 is 0-6V.
Below formula is for calculating the fuel percentage left for this fuel level sensor:
1.1*AD value
Percentage Left =
* 100%
4096 X 2
–
1.1*AD value
The value must be converted into decimal, for example, 0x0313 is 787 in decimal, the results is 11.82%.
