GENERAL FEATURES
The 601PH detector forms part of the series 600 range of plug in detectors for ceiling mounting.
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 until now could only be
detected by ion-chamber detectors.
For normal ambient conditions 601PH will behave 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 which will be
transmitted 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 vol-
ume, 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.
The second thermistor is located out of the airflow , but still within the smoke labyrinth and has a longer time costant and is
601PH
HIGH PERFORMANCE
OPTICAL SMOKE DETECTOR
Fins
Smoke path
Sampling Volume
Baffles
Emitter
Photo detector
Sampling Volume
Fins
Sensing
Reference
Fig. 1 System schematic
Ordering code: 516.600.002.B
EN54
part 7: 2000 standard
-
LPCB
approved.
S P E C IF IC A T IO N S
M i n
typ
M a x
O p e ra ti n g vo lta g e
1 0 .5 V
2 4 V
3 3 V
A ve ra g e q u i e s c i e n t c u rre n t
6 2
µ
A
6 5
µ
A
7 0
µ
A
S ta b i li s a ti o n ti m e
3 0 s e c
A la rm C u rre n t
s e e F i g . 3 / (m A )
H o ld i n g V o lta g e
2 V
H o ld i n g C u rre n t
0 .4 m A
R e s e t Ti m e
2 s e c
R e m o te L e d D ri ve
1 k
Ω
Te m p e ra tu re A la rm T h re s h o ld
5 4 ° C
6 0 ° C
6 5 ° C
N o rm a l R e s p o n s e T h re s h o ld
0 ,1 2 d B /m -2 ,7 % /m
R e s p o n s e th re s h o ld i n c a s e o f ra p i d te m p e ra tu re ri s e > 1 0 ° C
0 .0 5 d B /m -1 .1 % /m
S i ze H xD
4 3 x1 0 9 m m
W e i g h t
0 ,0 9 3 K g
O p e ra ti n g te m p e ra tu re
-2 0 ° C .. + 7 0 ° C
(D o n o t i n s ta ll i n lo c a ti o n s w h e re n o rm a l
a m b i e n t te m p e ra tu re i s b e lo w 0 ° C )
S to ra g e te m p e ra tu re
-2 5 ° C .. + 8 0 ° C
M A X e n vi ro n m e n ta l R e la ti ve h u m i d i ty
9 5 % n o n -c o n d e n s i n g
