Technical data

EDS - TECHNICAL INSTRUCTIONS
6
changes and, when these changes reach the programmed width and
time lenght, an alarm signal is generated. The advantage of this
circuit is the quicker fire detection, because the fire is detected in
its beginning phase.A typical example is the complete protection
of the dome of a church with important pictures on its surface.
The linear optical beam smoke detectors must be installed at the
baseline of the dome and therefore much lower than the ceiling. In
this case using the turbulence (heat) detection circuit is very useful
to improve the detection.
9.3 - selection of the sensitivity level of the circuit sensitive to
Turbulence(heat).
The operation is performed acting on selector SW1 of the RX that
has 4 positions (fig.9).
• sensitivity increases from 1 to 4
• position 1 : minimum sensitivity
• position 4 : maximum sensitivity
Regulation must be performed with caution because with an higher
sensitivity a quicker response time is obtained, but also the
probability of false alarm is increased. So the sensitivity selection
must be done according to the environmental conditions. If these
conditions are good an high sensitivity regulation is possible. If
in the environment, because of the normal working conditions,
dust's clouds, vapor or smoke are systematically produced, it will
be necessary to adjust the sensitivity to a lower level, so that these
factors doesn't generate false alarms.
10 - DETECTOR’S ACTIVATION
10.1 - on the RX, put the jumper of Initial Setup, JP1, in OFF ALI
(mark on circuit) position (alignment off)
10.2 - the blue alignment led flashes in a certain way (2 slow flashes
- a delay - 2 fast flashes and then this sequence is repeated)
10.3 - install the cover of the RX. This closing operation must be
done within 5 minutes. The level of the signal will be decreased
because of the attenuation caused by the cover
10.4 - the inside electronics wait 5 minutes for the installation of
the cover and then perform a quick procedure (1-2 minutes) to get
the RK100B output signal level back to 4,7-5V
10.5 - after this activation procedure, the detector becomes
operational. The blue alignment led switchs OFF (detail chap.10.2)
and it begins to flash as described in 10.6
10.6 - every 10 seconds the blue led will give out a short flash that
indicates the normal operation of the detector. In case of alarm
the frontal red led will light up and remain switched on until the
alarm state is present or, if the memory function is activated, until
the power supply is switched off for at least 5 seconds (v. chap.14)
11 - AUTOCOMPENSATION
11.1 - the inside electronics of the detector is equipped with a
special function of autocompensation of the signal. If the detector
is installed inside a particularly dusty place, the dust that is
deposited on the front of the TX and RX causes a drop of the output
signal level. This problem is automatically eliminated by the
autocompensation.
12 - OPERATIONAL TEST
12.1 - verification of the circuit sensible to obscuration
The verification is done simply darkening the TX or the RX with
an opaque screen. After 10 seconds, the RX alarm relay must
activate / deactivate (chap.5.2 - jumper JP7) and the frontal alarm
red led must be switched ON. After that, remove the screen and
the alarm relay must be switched and red led switchs OFF, and the
blue led restarts to flash every 10 seconds.
If the function of memorization is activated (v. chap.14), it is
necessary to remove the power supply of the RX for at least 5
seconds to remove the persistence of the alarm indication.
12.2 - verification of the circuit sensitive to turbulence.
Place and remove an opaque screen in front of the RX several
times with the following sequence (dark / light) and selecting the
corresponding sensitivity with SW1 selector:
• position 1.... 2 second dark - 2 second light for 10-12 times
• position 3.... 2 second dark - 2 second light for 8-10 times
• position 2.... 2 second dark - 2 second light for 6-8 times
• position 4.... 2 second dark - 2 second light for 4-6 times
After the correct sequence the turbulence relay must be activated.
13 -FAULT OUTPUT
13.1 - the fault relay contact is available on the terminal block
of the RX. This relay is normally activated and will be
deactivated if at least one of the following conditions are
verified:
• the output signal falls below the 90% preset value (optical beam
completely interrupted by an obstacle)
• the circuit of autocompensation has reached its limit (when this
happens it is necessary to do some maintenance on the detector)
• operation fault (detectors’s circuit malfunction)
Attention: the current standards indicate that the fault output can
be used for remote signaling, but must not be used for inhibiting
the alarm signal
14 - ALARM MEMORY AND CONFIGURATION DATA
14.1 - the receiver of the RK100B is equipped with alarm memory
that can be activated / deactivated with the JP5 jumper (fig.9):
• jumper JP5 in position 1-2 - memory deactivated (OFF)
• jumper JP5 in position 2-3 - activated (ON)
When the alarm memory is activated, if the detector gets in alarm,
the alarm output relay and the frontal red led remain activated until
the alarm condition gets off and power supply is removed for at
least 5 seconds. When the memory is not activated, if the detector
gets in alarm the alarm output relay and the red frontal led are
deactivated as soon as the alarm condition gets off.
14.2 - memory of configuration and settings data.
In case of lack of power supply the internal memory retains the
data. When the power supply is back the detector, after a setup
time of 2 minutes, returns to normal operation