A
one second cycle microprocessor tests the optical system, a loop
and own power supply. At quintuple detection of an operation threshold
excess on a smoke or at presence of the disturbing message in a
loop the signal "Fire" or “External alarm” is formed accordingly.
Once
in 30 sec. the sensor forms a signal of power supply presence as
a short-term switch of the light indicator, when the battery is
discharged the notice “Discharge of battery” is formed. At malfunction
of any of functional units the notice "Malfunction" is
provided.
Technical
Data: sensitivity - 0,05-0,2 Db/m; consumption current – 50 mcА;
supply power - 4 AAA cells; sensor overall dimensions without socket
- max 105х52 mm, temperature range- from -10 till +55 C°, average
service life – min 10 years.
Features
- 4 kinds of sound signals, that alongside with an opportunity of
sensors’ group operation renders a positive effect on the tactical
and operational qualities of independent signaling system.
- sensors are completed with 4 AAA supply power cells, due to this
the operating term of sensors is increased without replacement of
the battery in comparison with use of “Crone” type cells.
- mechanism of automatic compensation of a dust content and the
battery discharge (at the first switching on the sensor is adjusted
on a background value of the reflected signal for the given environment
with the subsequent automatic adjustment depending on dust concentration
in the chamber and supply voltage). In case of failure the signals
“Malfunction” or “Battery discharge” are formed accordingly.
This approach practically excludes false operations and considerably
prolongs the operation term between during-operation services.
- function of temporary (3 minutes) switching-off of the sound signal
by pressing the button. This time is enough for airing a room.
- the area of smoke intake is increased, at the same time the sensors
are protected from penetration of insects inside of case and optical
chamber with a small cell (0,6*0,6 mm) metal grid.
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Fire-safe
signalling devices
