User guide

File Name: MEITRACK VT310 User Guide Creator: Cavana Cheung

Project: VT310 Creation Date:

Update Date:

2010-08-26

2012-08-02

Sub Project:

User Guide

Page:

- 15 - of 30

Revision: V7.4 Confidential: External Documentation

- 15 -

0x0267=>615(decimal)=>(615*6)/1024=3.603515625V(voltage)

Application Example - Fuel Level Sensor

Fuel level sensors supplied by us are resistance-type sensors with output resistance:

0-200Ω(ohm).

For the circuit shown on the right picture, 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.

The below formula is for calculating the fuel percentage left for this fuel level sensor:

Note: The value must be converted into decimal, for example, 0x0267 is 615 in decimal.

10. Speeding Alarm

Command: W******,005,XX

Description: Turn on speeding alarm. When the tracker speeds higher than the preset value, it will send an SMS alarm to the

authorized phone number for SOS.

Note: XX is the preset value of speed and in 2 digits.

=00 , to turn off this function;

=[01, 20] (unit: 10Km/h).

Example: W000000,005,08

When the tracker’s speed is over 80km/h, an SMS alarm will be sent out.

11. Movement/Geo-fence

Percentage Left =

AD value

* 100%

1024*2 – AD value