Apollo Smoke Detector XP95 Betriebsanweisung PDF herunterladen (Seite 12)

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approximately linear

characteristic from 10°C to

80°C. This linearised signal is

further processed, depending

on the response mode

selected, and converted to

an analogue output.

For the European standard

version of the detector, the

five modes correspond to five

“classes” as defined in the

draft standard EN54

–

5:2000.

The classes in this draft

standard correspond with

different response

behaviour, each of which is

designed to be suitable for a

range of application

temperatures. All modes

incorporate “fixed

temperature” response,

which is defined in the draft

standard by the “static

response temperature”. The

application temperatures

and static response

temperatures for all response

modes are given in Table 3.

In addition to the basic

classification, a detector

may be given an “R” or “S”

suffix. The “R” suffix

indicates that the detector

has been shown to have a

rate-of-rise characteristic.

Such a detector will still

give a rapid response even

when starting from an

ambient temperature well

below its typical application

temperature. This type of

detector is therefore suitable

for areas such as unheated

warehouses in which the

ambient temperature may

be very low for long

periods.

The “S” suffix on the other

hand indicates that the

detector will not respond

below its minimum static

response temperature even

when exposed to high rates

of rise of air temperature.

This type is therefore

suitable for areas such as

kitchens and boiler rooms

where large, rapid

temperature changes are

considered normal.

DISCOVERY HEAT DETECTOR

Discovery Heat Detector ▲ Part Number 58000-400

OPERATING

PRINCIPLES

Discovery heat detectors

have a common profile with

ionisation and optical smoke

detectors but have a low air

flow resistance case made of

self-extinguishing white

polycarbonate.

The Discovery heat detector

uses a single thermistor to

sense the air temperature at

the detector position. The

thermistor is connected in a

resistor network, which

produces a voltage output

dependent on temperature.

The design of the resistor

network, together with the

processing algorithm in the

microcontroller, gives an

Fig.4 Discovery Heat Detector

Address Buttons

Thermistor Bead

PCB

Case Moulding

Heat Shrink Sleeving

Lid Moulding

LED

LED

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