Optical
Smoke Detector
A new
sensor design enables the Orbis optical smoke detector to
respond to a wide spectrum of fires without compromising
reliability. The detector is calibrated to make it highly
reliable but much less likely to generate false alarms. It
uses algorithms to decide when is should change to the
alarm state. Orbis optical detectors sample the atmosphere
every four seconds and the measurements are processed by
microprocessor. The processing power is used as part of
the design to eliminate unwanted alarms.
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Multisensor Smoke Detector
The
Orbis multisensor uses the new optical technology (see
above) in conjunction with a heat sensor to further extend
its capabilities as a smoke detector. It should be noted
that the Orbis multisensor is designed as a smoke detector
and cannot be switched from smoke to heat detection.
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Heat
Detectors
There
are six heat detectors in the Orbis range. The detectors
are classified according to EN54-5 as rate-of-rise or
static and are designated 'R' or 'S' accordingly. Static
heat detectors will respond only when the alarm threshold
is reached. Rate-of-rise detectors have this fixed upper
limit, but also measure the rate of increase in
temperature.
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TimeSaver Base
The
TimeSaver Base®
is a completely new design with a large open working area
and single quadrant terminals. Other features include two
fixing centres, a guide on the base interior to indicate
the length of cable to be stripped and
E-Z Fit slots to make
fitting to a BESA box easier. There is also a continuity
link that enables voltage testing of zone wiring prior to
commissioning. The link is automatically broken when the
detector is first inserted. The base also has a locking
mechanism so that if detectors need to be locked in, a
marked part of the base is simply cut out to make it a
locking base. |
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