Operating the DVR
4–12 700-0042 R004
4.6. Advanced Smart-Temp
The EX4 System incorporates the Advanced Smart-Temp™ which monitors the
temperature inside the DVR to ensure the hard-drive operates in a safe
environment. In many areas, the temperature drops well below 40°F (4°C) and
quite often below 32°F (0°C). Most computer hard-drives are designed to work
from about 40°F (4°C) to about 120°F (49°C).
4.7. Voltage Display
The EX4 System displays and records the input voltage of the vehicle on-screen.
This can be a very helpful tool if problems are encountered with low voltage
vehicle power supplies. If the voltage to the DVR is too low, the quality of the
video signal from the camera will be very poor, resulting in a poor recording.
4.8. Low Voltage and Low/High Temp Indicator
In addition to the on-screen voltage display, the EX4 DVR has a LOW VOLTAGE/
LOW/HIGH TEMP indicator on the back of the DVR. If the voltage to the DVR is
below 10.5 VDC, the
LOW VOLTAGE/LOW/HIGH TEMP indicator illuminates. The
DVR stops recording and begins to shut down as the voltage is too low to operate
the camera properly. When the voltage rises to 11 VDC, the red
LOW VOLTAGE/
LOW/HIGH TEMP indicator turns off and the DVR operation returns to normal.
The Low/High Temp indicator illuminates according to the temperature inside the
DVR. These settings are described in Table 4-5.
Smart-Link voltage
indicator
The Smart-Link module also has a voltage indicator, which works differently than
the
LOW VOLTAGE/LOW/HIGH TEMP indicator on the DVR. For the Smart-Link, the
green
POWER ON/LOW VOLTAGE indicator is illuminated when the DVR is
powered up and the operating voltage is above 10.5 VDC. When the voltage falls
below 10.5 VDC, the indicator flashes once every 2 seconds. If the voltage falls
below 7.5 VDC, the indicator flashes quickly (about twice per second) and the
DVR turns off the power to any attached peripherals (such as a GPS module or the
driver’s indicator panel).
Table 4-5
Advanced Smart-Temp features
Temperature inside
DVR
Advanced Smart-Temp…
LOW/HIGH TEMP Indicator
status
Below 32°F (0°C) Turns on the internal heater and pulses the system fan
to circulate the warm air.
Flashes to indicate that the
temperature is too low.
Below –5°F (–20°C) Will not power the DVR at all, although the hard-
drive can still be removed from the DVR.
Flashes to indicate that the
temperature is too low.
Above 113°F (45°C) Turns on the system fan. Flashes to indicate that the
temperature is too high.
Above 140°F (60°C) Shuts down the DVR to protect the hard-drive from
damage. The system fan continues to operate.
Flashes to indicate that the
temperature is too high.
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