teko Astra-642 Operating Manual

Astra-642

Ultrasonic Volumetric Detector

Operating Manual

Rev. 642-v2_6_en 1

The operating manual describes the operating principle, opera­tional and maintenance conditions pertaining to ultrasonic volu­metric detector Astra-642 (hereinafter “detector”) (Fig.1).
The manufacturer reserves the right to introduce changes
which update and retrofit the detector without prior notice. All
such changes will be described in an updated revision of the
operating manual.

1 Function

The detector detects intrusion into a pro­tected volume of a closed room and gene­rates an alarm notification by opening out­put contacts of the signaling relay.

The detector is powered by any DC
source with rated voltage of 12V and pul­sation amplitude not exceeding 0.1V.

2 Operating Principle

2.1 The operating principle of

the ultrasonic channel (herei­nafter referred to as the US­channel) is based on the
Doppler Effect – changes in
frequency of ultrasonic
waves emitted by the detec­tor, when they are reflected
from a moving object.
An electric signal from the ul­trasonic sensor is sent to a
microcontroller, which – if sig­nals are present in both chan­nels and in accordance with a
present operation algorithm –
generates the “Alarm” notifica­tion by opening the output cir­cuit of the optic-electronic relay.

2.2 Schematics of the detec­tion zone are shown in Fig. 2.

Note – The US-channel de-
tection zone depends on a
specific room: some objects
absorb or reflect ultrasound,
thus distorting the detection
zone.

3 Specifications

Technical Parameters of US-channel

Intrusion detection range, m, min................................................... 10

Confident detection area angle

in horizontal and vertical plane, о ............................................ 90

Operating frequency, kHz ....................................................... 25

Movement speed detection range, m/s................ from 0.3 to 2.0

Recommended mounting height, m ....................................... 2.2

General Technical Parameters

Power supply voltage, V .......................................... from 8 to 15

Current consumption, mA, max .............................................. 25

Readiness time, s, max .......................................................... 20

Permissible current through relay contacts, А, max............. 0,08

Permissible voltage on relay contacts, V, max ..................... 100

Resistance of the circuit, included in the alarm loop

in standby mode, Ohm ........................................................... 16

Overall dimensions, mm, max ............................... 106.5×72×38

Weight, kg, max ................................................................... 0.08

Operating Conditions

Temperature range, °С ................................. from -10 up to +50

Relative air humidity, % ...................................... up to 95 at + 35 °С

no moisture condensation

4 Delivery Set

Ultrasonic volumetric detector Astra-642 ........................... 1 pcs.

Bracket ............................................................................... 1 pcs.

Screw 2,9х25 (or 2-3x30) ................................................... 2 pcs.

Dowel 5х25 ........................................................................ 2 pcs.

Sealing material ................................................................. 1 pcs.

User Instruction ................................................................ 1 copy.

5 Structure

Fig. 3

Structurally, the detector is a unit comprised of a base and a
removable cover.

The unit houses a printed circuit board with radio elements,
screw terminal blocks for external connections, ultrasonic
transmitter and receiver (Fig. 3).

A switch installed on the printed circuit board generates a

“Tampering” notification when the cover is detached by open-
ing the ТМР circuit (irrespective of whether or not the detector

power supply is switched on).
The following indicators are mounted on the printed circuit

board: red – for detector status monitoring, blue – for interfe­rence indication.

The US-channel detection range can be adjusted using the
US-channel range controller.

Fig. 1

Fig. 2

Side view

Top view

Confident detection area

Probable detection area

10m

2.2m

10m

6m

0

6m

Wire
insertion holes

Mounting
holes

Screw
terminals

Tamper
Switch

PCB

Ultrasonic
transmitter

Plugs

Jumpers

US-channel
range
controller

Indicators

Ultrasonic
transmitter

Base

Cover removed

Rev. 642-v2_6_en

2

6 Information Capacity

Table 1 – Notification – Indicator and relay

Type of

notification

Indicator

Relay

Detector
standby mode
start

Blinks red and blue
alternatively after
power up.
Duration – up to 20 s

For up to 20 s
Norm

Not lit

Alarm

Lights up red once for
4 s if a person is de­tected moving in the
detection area (if indi­cation is permitted)

For 4 s

Alarm in “Alarm

memory” mode

Fig. 4

For 4 s

Failure

Lights up red until fail­ure is eliminated

Until failure eli­mination

Interference

Blinks blue for as long
as interference is
present (if indication is
permitted)

Tampering

Not lit

ТМП

" " –relay is closed,
" " –relay is open,
"ТМП " – ТМР circuit is open

Fig. 4

7 Operating Modes

Table 2 – Operating modes and settings

Operating mode

Plug

Jumper

position

Indication ON
Indication OFF

ИНД

+
–

High detectability
Normal detectability

РЕЖ

+

–

“Alarm memory” ON
“Alarm memory” OFF

ПАМ

+
–

"+" - jumper is installed on both plug pins
"–" - jumper is removed (or installed on one plug pin)

 The “Alarm memory” mode allows registering the fact

and number of zone violations in prortected area, and is
reflected in corresponding notification .

The mode is activated in 1 minute after installation of ПАМ
plug or in 1 min. after starting of detector stand-by mode with
jumper installed previously on ПАМ plug. “Alarm” notification
is indicated in 1 min. after violation of protected area. To
switch the mode off and reset indication, remove jumper from
ПАМ plug or switch power off.

8 Installation and Pre-starting Procedure

8.1 Works on installation, mounting, maintenance and

operation of detector should be performed by only qualified
persons.

8.2 After transportation in conditions differing from those of
operation keep detector unpacked under supposed operation
conditions for at least 4 hours.

8.3 Selecting a Location

8.3.1 Recommended mounting height

8.3.2 The detector shall be mounted on load-bearing, vibra-

tion-free structural elements.

8.3.3 Alarm loop and power circuit wires shall not be located near
power cables.

8.3.4 This detector type allows mounting several detectors in
the same room. Detectors shall be placed not closer than 5

m from each other.

8.3.5 It is not permitted to operate the detector in a room with

noise levels exceeding 75 dB.

8.3.6 Do not mount the detector near curtains (blinds) and
other object which may move when air currents move through
the room.

8.3.7 When a room is being protected, it is recommended to
close doors and ventilation windows, switch off fans, air condi­tioners and other possible sources of strong air currents, and
make sure there are no animals and insects in the room.

8.3.8 Non-recommended mounting locations

m

Indication is

ON

Indication

Is OFF

Start of

indication

Number of alarm

events (up to 3)

Reiterated indication

0.5s 0.5s 0.5s

1s

1s

4s