teko Astra-421 Operation Manual

This operation manual is intended for studying principle of
operation, correct use, operating conditions and maintenance of
the wireless optoelectronic smoke detector «Astra-421» ver.RF
(hereinafter «detector») (figure 1).
The manufacturer reserves the right to make alteration regard-
ing refinement of the product without prior notification. All
changes will be imported into new edition of the operation manual.
1 Function
1.1
The detector is intended for
detecting fire followed by smoke
spreading, forming and transmit-
ting «Fire» notification to the re-
«Astra-RVA»
ceiver (hereinafter
«receiver») of wireless intrusion/fire
detection and alarming system Ob-
server-1.
1.2
The detector supports 3 operat-
ing frequencies.
1.3
Electric power is supplied by a
lithium-thionyl-chloride battery cell
standard size AA, voltage 3,6 V
(included in delivery set).

2 Principle of Operation

The principle of operation of the detector is based on register-
ing infrared radiation (hereinafter IR) that is reflected from
smoke particles in the smoke chamber by a photodetector. Fur-
ther the electric signal formed by the photodetector is amplified
and sent to microcontroller in order to analyze the smoke densi-
ty value. The detector generates «Fire» or «Warning» notifica-
tion in accordance with a specified operating algorithm.

3 Specifications

Detector`s sensitivity, dB/m ................................ from 0,05 to 0,2
Response time, sec., max ......................................................... 5
2
Detection area, m , max ........................................................ 110
Installation height, m, max ....................................................... 10
Technical Parameters of Radio Channel
Operating frequency, MHz ................................................ 433,42
Emission power, mWt, max ..................................................... 10
Wireless coverage range*, m, min ......................................... 300
General Technical Parameters
Current consumption:
- with transmitter turned OFF, mA, max............................... .0,05
- with transmitter turned ON, mA, max ................................... .25
Supply voltage, V ................................................. from 2,7 to 3,6
Technical readiness time, s, max......................................60
Standby mode recovery time, s, max ...................................... 60
* Along the line-of-sight. Wireless coverage range is largely dependent
on the design features of construction, the installation location, the in-
terference situation.
Astra-421 Ver. RF
Wireless Optoelectronic Smoke Detector
Operation Manual
Figure 1
Overall dimensions, mm, max
- diameter .............................................................................. 100
- height ..................................................................................... 47
Weight, kg, max .................................................................... 0,12
Battery cell average life time, years, min ................................... 3
Operating Conditions
Temperature range, °С ..................................... from - 10 to + 55
Relative air humidity, % ................................ up to 93 at + 40 °С

4 Delivery Set

Wireless optoelectronic smoke detector
«Astra-421» ver. RF ........................................................... 1 pcs
Screw 3,9х32 ...................................................................... 2 pcs
Dowel 6х30 ......................................................................... 2 pcs
Battery cell .......................................................................... 1 pcs
Operation manual ............................................................. 1 copy
5 Structure
Constructively the detector consists of a removable electronic
unit and a base (figure 2).
Inside the electronic unit is a smoke chamber and printed circuit
board (PCB) with radio elements and photodetector.
Mounted on PCB is a LED for checking the detector`s operability.
The design of the detector provides for its installation on the
ceiling.
Note - It is not recommended to disassemble the electronic unit
of the detector, as it may damage the detector's tuning.
without moisture condensation
Figure 2