ISTM-ALL MDVR-2012_Q2_Ver 1.0
10/30
1.
The MDVR cannot be installed on the vehicle floor directly. MDVR housing must be insulated with the
body of the vehicle. External protection cap or box is necessary for waterproof and dustproof.
2.
Horizontal installation is recommended by manufacturer
3.
The LED light on the MDVR front panel should be outward for each checking the MDVR working status and
receiving the IR signal.
4.
Some tips for installation:
（
1
）
12V natural gas anti-interference isolation
When install the MDVR in 12V natural gas vehicles, the MDVR device must be insulated with the body of the
vehicle. Get power for the MDVR from vehicle battery directly and make sure to install the power protector and
security device between the MDVR device and battery.
（
2
）
Pay attention to the polarity of electric power switch control (polarity test method: disconnect control
switch, take a wire from battery negative polarity, test it with digital multimeter. Connect this wire by
black pen on the multimeter, then connect vehicle body with red pen. If the circuit is working, this means that
vehicle power switch control is positive. If not, it is negative. If the vehicle switch is negative, it is
necessary to deal with the insulation between MDVR device and the accessories.
（
3
）
It is very necessary for 12V battery-powered vehicles to deal with the insulation between the MDVR device and
the accessories of MDVR.
Positive
polarit
y
Negative polarity
Fuse
Vehicle Battery
Device to control the ignition of vehicle
MDVR power input negative polarity
MDVR power input positive polarity(red)
Mobile DVR
The lock for removable hard
disk case (lock it before booting
up the MDVR)
The ACC
signal cable
(yellow).
The voltage
is ≥7.5V
