03/08/2014
ADDRESSABLE SMOKE/HEAT DETECTOR WITH BASE
The FEAO2000 is an analogue addressable Optical smoke
detector that works to the Zeta Addressable protocol,
compatible with Zeta alarm system control panels only.
The optical chamber consists of a removable plastic mesh,
an IR LED & an IR receiver. These are arranged such that in
normal conditions (clean air), no IR from the LED will reach
the IR receiver.Every second, the IR LED emits a burst of collimated infra red light. If there is any smoke in the chamber, it will scatter
the IR, allowing it to reach the receiver. The amount of IR
reaching the receiver is converted to an analogue smoke
value, and sent digitally back to the fi re alarm control
panel as part of the detectors communication protocol.
The detector is supplied with a locking screw to prevent
removal of the head by unauthorised personnel. The
detector will return an analogue value of 55 counts with a
smoke obscuration level of 2.4% obscuration per metre.
The Fyreye optical smoke detector is particularly suitable
for detecting optically dense smoke, involving materials
such as soft furnishings, PVC, plastic, foam, and similar
materials which produce large visible small particles
(0.5mm to 10 mm).
It is not affected by wind speed, so can be used in exposed
places, where an ionisation detector might give false
readings.
The FEAH2000 is an analogue addressable Heat
detector that works to the Zeta Addressable
protocol.The FEAHH2000 is an analogue addressable high
temperature heat detector.
The measuring circuit is based on a single precision
thermistor, whose characteristics change according
to temperature in a defi ned manner.
This change in characteristics is converted to an
analogue value, and sent digitally back to the fi re
alarm control panel.On the FEAH2000, the analogue reading is the
temperature in Centigrade (°C), so an analogue value
of 55 will be returned at 55°C.On the FEAHH2000, the analogue reading changes by one count when the temperature rises by 2.17 °C, so the detector will return a value of 55 at 90 °C.
