Page 69 of 85
viasis 3003 user manual
via
traffic
controlling
gmbh
To avoid blinding effects of the vehicle drivers, especially during night-time or covered sky, the
system is equipped with an environment light sensor and a LED brightness control with a reso-
lution of 0,5% of the maximal brightness.
7.5 Display frequency
The update frequency of numeric LED display is identical with the measurement frequency of
the radar detector. As long a moving object is detected its speed is updated all
1,5 seconds
on
the numeric LED display. The last measured speed value is hold for about 3 seconds on the
LED display.
The display cycle of 1,5 s has emerged as ideal in comprehensive tests. The driver perceives
the display frequency after interviews not as too high and therewith not too flurry. In contra-
diction, the driver sees the displayed speed from a quite far distance, realizes that he is over
speeding and slows down. On the display he (and the spectator) gets as a direct feedback the
reduced speed displayed, let’s say as reward and the driver passes the display with the correct
speed. Characteristic is that the driver has enough time to develop a feeling for the right speed.
Hereby is the high distance range the decisive advantage. At a shorter distance range, the driv-
er gets his over speeding displayed, but there is no time for a „dialogue“ between driver and
display. The driver has no time to react and the feedback - the reward is missing as well.
7.6 Power supply and operating time
7.6.1 Accumulator version
For the power supply a 12 Volt lead gel battery pack with a capacity of 17 Ah is installed in a
small plastic box on the backside of the housing.
The viasis has a discharge protection for the accumulator to prevent irreversible chemical de-
composition of the battery electrolyte due to long time discharge below 10,7 Volt. The
protection circuit disconnects the viasis from the battery when the voltage drops below 10,7
Volt and (re-)connects it when the battery voltage is 11,3 Volt minimum.
The operating time of the viasis relies essentially on the number of displayed speed values, the
environment brightness and self evidently on the battery capacity. In bright sunlight the power
consumption due to maximum LED brightness is maximal 11 Watt when displaying “188” on
the numeric LED display. By night with minimum LED brightness level the consumption is less
than 1 Watt for displaying “188”.
So the operating time of the viasis 3003 is at a display rate (relation between display on and off
time) of 25%, with calculated 16 day and 8 night hours, for the 17 Ah battery about two
weeks.
7.6.2 Mains supply 115/230 Volt AC version
Attention: For viasis delivered as 115/230 Volt AC version do not remove or
disconnected the buffer battery. The buffer battery delivers peak currents,
filters mains distortions and ensures that the voltage level of the AC/DC
power supply does not rise to illegal over voltage levels and blows the system fuses.
Additionally the buffer battery allows the operation of the viasis at timely powered light poles
and ensures an operation for several days if the mains line is switched off.
In rare cases with the viasis connected to a heavily distorted mains supply it might be necessary
to install a harmonic filter to ensure proper system operation.
