System1000_GB_130705.doc
Page
3
6. How the System Works
The keyfob sends an RF signal which activates or deactivates the siren. In the armed state, when a PIR
senses a movement in its detection path, it sends an RF signal to the siren to activate. The siren then
sounds for two minutes, and the system is in the armed state again. The system may be deactivated at
any time with the keyfob. Always deactivate the system before entering your property.
A delay of 10 seconds enables you to activate or deactivate the system inside your property.
7. Planning your System
Before installing the components, you should plan their positions and check the function of the
components in these positions.
Fig. 2 shows an example:
Important points to consider:
-
Do not mount the siren close to metal fittings such as metal downpipes or satellite dishes which may
affect radio signal transmission.
-
The siren should be mounted at an outer wall, preferably in south direction, as this is where the solar
cells work best. Otherwise it can be mounted in east or west direction. North direction will work too,
but in this case the batteries will be used more. The solar cells also provide power when the sky is
cloudy. However, you should make sure that the solar cells are not placed in the shade of trees, walls
or roofs. Remember that the sun is in a lower position in the winter than in the summer.
-
An anti-tamper switch protects the siren against tampering. However, you should install the siren as
high as possible to make tampering more difficult.
-
The siren is for outdoor use, but it should be protected from direct rain.
-
The siren should be installed at a place where it can reach the radio signals transmitted by the keyfob.
You should also be able to hear the bleeping sounds of the siren.
-
Your property is monitored by PIR sensors located indoors. High security is not necessarily achieved by
a great number of sensors, but by reasonably installing them in key positions. Choose areas that will
probably be entered by a burglar, such as corridors, staircases or entrances.
-
The PIRs must be fitted in radio range of the siren. The outdoor range is up to maximum 30m. This
range is reduced by walls and ceilings (especially reinforced concrete) as well as other sources of
interference, e.g. radio transmission from other devices in the frequency range of 433MHz such as
radio headsets. As such disturbances may change within a longer period of time, we recommend that
you install the PIRs within the maximum radio range. Whenever possible, locate the sensors as close
to the siren as you can.
-
The PIRs react to warm moving bodies, e.g. a person’s movement within their detection range (up to
approx. 8m at 90° and a height of approx. 2,3m; see fig.3).
-
A room can best be monitored, it the PIR is located in one of the corners.
-
As the PIR reacts to warmth, it should not be positioned near a heat source such as radiators, air
conditioning, windows, stoves, fax machines or in draughty areas.
fig. 2
