Aritech DIGITALK 2000 Guide D'installation page 12

PREFACE....................................................................................................................................... 11
PLANNING ..................................................................................................................................... 11
ASSEMBLY .................................................................................................................................... 11
ALIGNMENT PROCEDURE .......................................................................................................... 14
PUTTING INTO OPERATION........................................................................................................ 15
CHECKING THE INSTALLATION ................................................................................................. 17
PREFACE
A complete pair of devices consists of a transmitter TX and a receiver RX, each with two double
parabolic mirrors. This specifically designed transmission system permits the use of up to 4 devices,
beaming in one direction with no mutual interference.
During operation the transmitter sends four IR beams to four parabolic mirrors on the receiver. An
alarm output requires the sudden simultaneous break of all four beams.
Planning
The following features are important for planning the installation:
• Do not exceed the recommended transmission range.
• Requires an unimpeded direct line of vision between transmitter and receiver.
• The range is reduced in dense fog.
• Optimally align the transmitter and receiver.
• Install the devices and pillars on solid surface.
• Use a maximum of four transmitters beaming in same direction.
• Never expose the devices to the direct effects of dirty water.
• Never expose the receiver to direct sunlight (Indoor mode).
• Use only shielded, twisted-paired cabling.
• Provide sufficient number of core leads and sufficient cable thickness.
• Heating elements are required for outdoor use.
• Note double exposure by mixed installation with other systems (DIGITALK is also
Master and Slave) !
Examples for Planning: Please, request on Warning Planning Instructions
Assembly
Alarm
An alarm is set off when all four beams are completely interrupted.
First alarm memory
It identifies the specific detector and records any alarms occuring during the current disarmed period.
Self- diagnostic test DQ
The device can detect when the IR beam intensity at the receiver is reduced, due to for example dense
fog, snow, a dirty lens or mechanical problems. The beam is then ignored in order to avoid signalling a
false alarm.
The time interval to trigger this can be adjusted to 5, 10, 15 or 30 seconds. During this time the
receiving amplitude must be below a defined level. If this level is exceeded, even temporarily, the time
restarts.
Technical Alarm
There is a technical alarm when an error occurs in the data processing device or it fails due to external
distrurbances.
English
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