General Features; Operating Principle - Bentel Security 601PH Mode D'emploi

GENERAL FEATURES

The 601PH detector forms part of the series 600 range of plug in detectors for ceiling mounting. The detector plugs into the
MUB universal Base and is intended for two-wire operation with the majority of control conventional equipment available.
601PH detectors react to the complete range of fire products, from slow smoldering fires , producing visible particles to
open flaming fires producing large numbers of very hot smaller sized aerosols.
The combination of optical and heat technology allows detection of clear burning fire products which hitherto could only
be detected by ion-chamber detectors.
For normal ambient conditions 601PH behaves as a normal optical smoke detector, only when a rapid rise in temperature
is detected does the sensitivity of the detector increase and the presence of smoke will confirm a fire condition wich will
be trasmetted as an alarm level. The 601PH design incorporates a unique "mousehole" optical chamber with an unrivaled
signal to noise ratio providing high resilience to dust and dirt which means reduced servicing cost. In addition a unique
chamber cover actually draws slow moving smoke into the chamber to provide a more responsive detector.

OPERATING PRINCIPLE

Smoke detection
The 601PH detects visible particles produced in fires
by using the light scattering properties of the particles.
The optical system consist of an emitter and
receiver, so arranged that their optical axes cross
in the sampling volume.
The emitter produces a narrow beam of light which
is prevented from reaching the sensor directly by
the baffles. When smoke is present in the sampling
volume, a proportion of the light is scattered, some
of which reaches the receiver.
For a given type of smoke, the light reaching the
sensor is proportional to the smoke density. The
amplified output from the sensor is used to activate
an alarm circuit at a predetermined threshold.
Thermal measuring system
The thermal mesuring system is designed to detect the presence of horizontally moving hot air draughts moving across
the ceiling which occour in a fast burning fire.
The system consist of two fast responding negative temperature thermistors. A sensing thermistor is located above the
labyrinth under the cover in the airstream and will detect any sudden changes in the air temperature or draughts of hot
air moving across the ceiling.
Operating voltage
Average quiescient current
Stabilisation time
Alarm Current
Holding Voltage
Holding Current
Reset Time
Remote Led Drive
Temperature Alarm Threshold
Normal Response Threshold
Response threshold in case of rapid temperature rise>10°C
Size HxD
Weight
Operating temperature
Storage temperature
MAX environmental Relative humidity
601PH
HIGH PERFORMANCE
OPTICAL SMOKE DETECTOR
EN54 part 7: 2000 standard - LPCB approved.
Sampling volume
Smoke path
Sensing
Reference
SPECIFICATIONS
Min
10.5V
62µ A
54°C
-20°C .. +70°C
Fins
Baffles
Emitter
Sampling volume
Fins
Fig. 1 System schematic
typ
24V
65µ A
30 sec
see Fig. 3 / (mA)
2 sec
1kΩ
60°C
0,12 dB/m-2,7 %/m
0.05 dB/m -1.1% /m
43x109 mm
0,093Kg
(Do not install in locations where normal
ambient temperature is below 0°C)
-25°C .. +80°C
95% non-condensing
Photo detector
Max
33V
70µ A
2V
0.4mA
65°C