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Installer instructions / Manuel installateur - Domonial CMI 800++ 11/2005
2 – INSTALLING
2-1 Preliminary precautions
The circuit board uses advanced technology CMOS circuits : as with any other electronic devices, these circuits are sensitive to
electrostatic shocks.
Before touching the board or its circuits, discharge the electrostatic current by touching the earthed box base.
Characteristics of a radio transmission
Like light, radio waves are propagated in a straight line. They can be
attenuated when sent through certain materials (wood, Artex, brick,
concrete, steel reinforcements) and even reflected by metal surfaces
(mirror, steel sheeting, aluminum steam-arrestor, fine-mesh wire-
netting).
It is therefore obvious that the quality and range of radio links between
the various components largely depends on the existing environmental
characteristics (nature and thickness of the neighboring materials).
In the open (without any obstructions) the radio transmitter range is
more than 150 m. Indoors, the range is reduced (by 30 to 50% as an
average) by the various obstructions.
The four diagrams (opposite) show radio wave behavior as a function of
the interfering material:
Checks before installation
The above paragraph demonstrates that radio wave behavior is not
necessarily identical in every premise therefore, before securing the
various components of the system, the following tests should be
made :
Test the radio link by positioning each peripheral unit and the control
panel in their anticipated final locations (use the "radio recept." caption
in the main menu). It is not necessary to record the peripheral at this
stage.
Using the field meter, check the received radio signal strength for
each peripheral. For a reliable radio communication a minimum level of
2 boxes is recommended.
If such signal strength cannot be obtained, move the device a few inches
or slightly move the control panel.
Built-in field meter
To help you find the best position for the system
components, the Domonial 800++ control panel has a
radio field meter of the RSSI type. This enables you to
check the strength of the received radio signal.
Scaled from 1 to 10, this information is delivered
during the test and record phases. Therefore, to make
the best use of this function, it must be carried out
when the transmitter is in its final location.
Warning : Any work inside the 800++ control panel
enclosure must be carried out by qualified personnel :
ELECTRIC SHOCK HAZARD
Low attenuation High attenuation
Medium attenuation Reflexion
90-100%
65-95%
10-70%
0-10%
Wood, plaster
Reinforced
concrete
Sheet steel
Bricks
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