Bentel 601CH, Руководство пользователя

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GENERAL FEATURES
The 601CH 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.
601CH have a fast response in fire detection, are tolerant in positioning and can be mounted in locations where there are
likely to be obstacles to free smoke plume movement. These detectors are particulary well suited to sleeping risk,
storage areas and applications where smoke detectors are prone to false alarm.
Incorporation of A1R rate of rise heat detector within the 601CH provides extra non-selectable detection modes which
allows the detectors to operate in a wide variety of applications where combined risk mean that CO detection alone would
be insufficient.
The integrated rate of rise detector acts as a normal heat detector, additionally enhancing the sensitivity of the carbon
monoxide detector if a rapid change of temperature is detected by the detector thermistor.
OPERATING PRINCIPLE
CO Detection
The 601CH uses an electrochemical cell to detect
the build up of carbon monoxide generated by fires.
The cell operates by oxidising carbon monoxide on
a platinum sensing electrode. On a corresponding
counter electrode the other half of the reaction
takes place. The sensing cell is represented
diagrammally in Fig.1.
When this reaction takes place, the potential
across the cell tries to change and this causes a
current flow within the circuit around the cell. The
current is mirrored into a current to voltage
conversion circuit. The resulting output is directly
proportional to the carbon monoxide concentration.
The cell itself has a diffusion limiting component to ensure that
all carbon monoxide in the area proximate to the sensing electrode
is continuosly oxidised. This means that the rate of transport of
carbon monoxide to the cell is directly proportional to the external concentration and independent of air-speed.
Rate of Rise Thermal detector (according to standards EN54-7 – A1R)
In the 601CH detector two negative tempearture coefficient thermistors are used ,one is exposed to the air whilst, the
other is termally lagged inside the detector body. If the temperature of the air around the detector rises quickly a
temperature difference will be estabilished between the two thermistors.If a particular rate of change of temperature is
sustained for sufficient time the detector will notify the alarm.
If the rate of temperature increase is very slow, then the temperatures of the two thermistors will be more nearly equal.
601CH
CARBON MONOXIDE FIRE DETECTOR
Fig. 1 Representational Diagram of CO Sensing Cell
Comply with EN54 standard
CONTACT PINS
ELECTRODES ELETTROLYTE
DIFFUSION BARRIER
S P E C I F I C A T I O N S
M i n T y p M a x
O p e r a t i n g v o l t a g e 1 0 . 5 V 2 4 V 3 3 V
A v e r a g e q u i e s c i e n t c u r r e n t 7 9
µ
A 8 7
µ
A 9 1
µ
A
S t a b i l i s a t i o n t i m e 2 0 s e c
A la r m C u r r e n t s e e f i g u r e 3 ( m A )
H o ld i n g V o lta g e 5 V
H o ld i n g C u r r e n t 3 m A
R e s e t T i m e 2 s e c
R e m o t e L e d D r i v e 1 k
Ω
S t a t i c R e s p o n s e Te m p e r a t u r e 5 4 ° C 6 0 ° C 6 5 ° C
Te m p e r a t u r e r a t e o f r i s e
R e s p o n s e T h r e s h o l d
A c c o r d i n g t o E N 5 4 - 5 S ta n d a r d s ( A 1 R )
S i z e H x D 4 3 x 1 0 9 m m
W e i g h t 0 , 0 9 K g
O p e r a t i n g t e m p e r a t u r e - 1 0 ° C . . + 5 5 ° C
S t o r a g e t e m p e r a t u r e - 2 0 ° C . . + 5 5 ° C
M A X o p e r a t i o n a l e n v i r o n m e n t a l
R e la t i v e h u m i d i t y
9 0 % n o n - c o n d e n s i n g
M A X s t o r a g e e n v i r o n m e n t a l
R e la t i v e h u m i d i t y
> 4 0 % . . < 7 0 %