Technical data

EDS - TECHNICAL INSTRUCTIONS
5
SIG terminal and the negative power supply one and read the analog
output signal. Instead of the multimeter it is possible to use the
STS01 meter (optional - fig. 11). If the output signal is very low it
means that the operations of optical alignment described in chapter
5 have not been performed in the right way and therefore must be
repeated
8.10 - the Transmitter emits a conic beam which form and
dimension, in relation with the distance between TX and RX, are
explained in figures 5 -6.
It’s important that the Receiver is in the center of the Transmitter
conic beam because, under these conditions, even if some small
movements of the wall on which the transmmietter is mounted on
happen (caused by deformations), the reflector remains always
within the beam and therefore active.
To obtain this, the operations of fine centering with output
signal measuring, explained below, must be performed with
care.
8.11 - adjust the signal around 3V acting on the trimmer P1 (fig.9)
8.12 - search for the maximum output signal optimizing the optical
alignment of the Transmitter acting slowly and in sequence on the
3 screws of regulation V1-V2-V3 present on the optical block.
This procedure takes some time but, if performed well, it assures
a perfect operation of the detector for many years. We suggest to
use the following procedure:
• on the TX slowly turn the screw V1 clockwise and then look at
the value of the signal visualized on the multimeter on RX. If the
signal increased (for example from 3V it rised to 3,5V) then again
turn the screw V1 of the TX clockwise and then look at the value
of the signal on the RX
• continue with this procedure as long as the signal on the RX
increases. When it has the tendency to decrease instead, stop the
operation on the screws V1 of the TX returning to the previous
position
• if during the operation the signal overcomes 4,5V, to avoid the
saturation, act on the trimmer P1 of the RX to bring the signal
back to 3 V, allowing the best evaluation of the variations of the
signal
• after finding out the maximum og the signal acting on the screw
V1, perform the same operations on the screws V2 and V3 of the
TX. In such way the best possible position of optical allignment is
reached. This procedure is important because it will assure a perfect
operation of the detector for long time
8.13 - if you don't have a multimeter it is possible to get good
results in the optical alignment of the detector as well, looking at
the RX blue and red leds indications. Operation is the following:
• 1 flash of the blue Led: 1 Volt
• 1 flash of the red Led: 0,5 Volts
• if the signal is smaller of 0,5V the blue led and red one are off
• if the signal in the range 0,5-1 V the red led performs 1 flash,
remains off for 2 seconds and then it repeats the sequence
• if signal is among 1-1,5 V the blue led flashes once, remains off
for 2 seconds and then it repeats the sequence
• if signal is among 1,5-2V the blue led flashes once and the red
led flashes once. They remain off for 2 seconds and then the
sequence is repeated
• if signal is among 2-2,5 V the blue led flashes 2 times, remains
off for 2 seconds and then it repeats the sequence
• if signal is among 2,5-3V the blue led flashes 2 times and the red
led flashes once. They remain off for 2 seconds and then the
sequence is repeated
• same type of indication up to 4 V
• if the signal overcomes 4 V, the blue Led flashes faster and faster
as the frequency signal increases up to 4,7V
• when the signal overcomes the 4,7V and in the range 4,7V -
4,9V, the blue led is continously ON. This is the position of
optimal setup
• if the signal gets over 4,9V the two blue and red leds are
permanently on. This is the saturation indication.
The table of fig.8 recaps the leds operation.
8.14 - install the cover of the TX
8.15 - after closing the cover of the TX and performing the
operations of fine optical alignment using the multimeter, the
STS01 meter or the indications of the leds, adjust the output signal
on the RX to a level between 4,7-4,9V, slowly turning the trimmer
P1. When the signal it is included within this range, the blue led is
costantly ON. This it is the position of optimal setup. If the signal
overcomes the 4.9V, the detector goes in saturation and the blue
and red leds are both ON. Therefore acting on P1, it is necessary
to set the signal between 4.7-4.9V so that the red led switches
OFF and is only the blue Led remains ON (to avoid saturation).
Attention! - this regulation is not critical. The procedure
indicated above is the optimal one, but it is enough if the blue
Led is flashing or constantly ON to have a good setting.
However it is necessary to avoid the saturation (red Led ON).
The microprocessor automatically compensates the
inaccuracies of the setup.
8.16 - select the alarm threshold level of the circuit sensible to
obscuration acting on the selector SW2 with the following possible
choiches :
• position 1 - low sensitivity - obscuration alarm threshold
set to 70%
• position 2 - low to medium sensitivity - obscuration alarm
threshold set to 60%
• position 3 - medium to high sensitivity - obscuration alarm
threshold set to 50%
• position 4 - high sensitivity - obscuration alarm threshold
set to 40%
8.17 - sensibility must be regulated according to the environmental
situation. The setting must normally be a medium sensitivity level,
but in case of dusty and perturbed environments it will be useful to
set a lower sensitivity level.
9 - SETUP OF THE TURBULENCE (HEAT) CIRCUIT
9.1 - The RK100/200B detector is equipped with a special
additional circuit for the detection of air Turbulence (heat). This
circuit is independent from the classic obscuration one and in
particular situations it can be used to increase the performance of
the detector. If these particular situations are not present the
Turbulence circuit can be left unused.
9.2 - This circuit is particularly useful when, for environmental
reasons, the linear optical beam smoke detectors must be installed
at distances from the ceiling higher than the nominal. When the
fire begins, it produces smoke clouds and hot air bubbles that go
up. When these bubbles intercept the infrared beam they perturba-
te it because they produce a change of the optical-physical
characteristics of infrared beam. These changes are obviusly
correlated in time. This circuit is been projected to detect these