Aritech VV600, Планирование и руководство по установке

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Planning and Installation manual VV600/VV602Plus 9
3.2. The VV602Plus ATM seismic detector
The Aritech VV602Plus detector is a seismic detector capable of detecting
vibrations from an attack on an automatic teller machine (ATM) or night safe
deposit box to which it is attached, but still disregarding the vibrations created by
the normal operation of the protected object.
FUNCTIONAL DESCRIPTION OF THE VV602PLUS
3.2.1. Sensor element
As in VV600Plus.
3.2.2. The low integrating channel
The low integrating channel looks at the low amplitude, long duration signals. This
integrating channel is inhibited until the signal amplitude reaches a certain pre-set
level. Upon reaching this amplitude level, the signal is further processed and
integrated. At the same time a timer is started. As long as the signal is constantly
available the timer will run, upon an interruption of the signal, the timer will reset the
channel to inhibited state after a pre-set time.
3.2.3. The high integrating channel
To prevent signals from the night-safe or the ATM from disturbing the VV602Plus,
upon the first appearance of high amplitude signals, these signals are treated as if
coming from the protected unit itself and are inhibited from reaching the integrator.
At the same time a timer is started. After a short period of time the high integration
channel timer runs out and if the signal still is present, the signal is released for
integration.
3.2.4. The explosion channel
As in VV600Plus.
3.2.5. Power supply
As in VV600Plus.
3.2.6. Sabotage protection
As in VV600Plus.
3.2.7. Alarm output circuitry
As in VV600Plus.
Accelero-
meter
Low level
integrating
channel
High level
integrating
channel
Explosion
channel
Signal conditioning
Alarm
output
Test
oscillator
Sabotage
protection
Power
supply
Sensitivity
Test
S
Internal VVT
Te
S
S
S
A
A
Te
A
-
+
9-
3
5
4
6
7
8
9
10
11
2
1