SPB-24
PROJECTED BEAM
SMOKE DETECTOR
DESCRIPTION
The FCI Model SPB-24 projected beam smoke detector is a
line type of device designed to detect black, gray or white
smoke over large, elongated areas. The system consists of an
emitter and receiver. The emitter projects a near infrared
pulsed beam to a receiver which may be located from 10 up to
l00 meters (32.8 to 328 feet) from the emitter. Spacing be-
tween units can be as much as 45 feet on centers.
The length of protected path and ability to distinguish be-
tween blockage and smoke from fires make the SPB well
suited for use in atriums, gymnasiums, theaters, museums,
factories, tunnels, churches, cathedrals, anechoic chambers
and high air velocity areas.
The detector has three field adjustable sensitivity settings
for obscurations of 25%, 50% and 70%. These settings are
dependent upon the monitoring distance and ceiling height.
Should the smoke from a fire cause a decrease in the signal
strength of a magnitude that exceeds the programmed
obscuration setting, an alarm signal is generated. An inter-
ruption of 90% of the beam within a short period of time will
create a trouble condition. Thus the unit can readily distin-
guish between a high smoke level and a sudden blockage or
emitter failure.
Explosive atmospheres
may also be protected by locating
the transmitter and receiver heads facing each other from be-
hind windows outside the explosive areas. The beam can be
projected up to 30 meters (100 feet) in such applications.
Outputs from the receiver are Form “A” alarm contacts and
Form “B” trouble contacts. This detector may be used with
any UL listed 24 VDC control panel having the proper cur-
rent capacity.
The receiver contains a microprocessor which automati-
cally makes periodic adjustments to the system to compen-
sate for normal ambient changes that cause contamination of
the lenses and for aging components. Since such a change
with time appears as a slow change in the beam signal, the
microcomputer compensates in such a manner that the signal
moves closer to the reference data at a rate of approximately
1% per hour. When this compensating capability reaches a
limit, the microprocessor automatically generates a trouble
signal.
FEATURES
·
Use with any FCI or Other U.L. Listed
Control
·
Operation Unaffected by Air Velocity
·
Three Field Adjustable Sensitivity
Settings: 25%, 50% and 70%
·
Form “A” Alarm Contacts
·
Form “B” Trouble Contacts
·
Four-wire Configuration
·
Low Supervisory Current
·
Calibrated Filters available
to Verify Sensitivity
APPROVALS
U.L. (STD 268)
Factory Mutual
S1383
1Y0A5.AY
Specifications are provided for information only, are not intended to be used for installation purposes, and are believed to be accurate. However, no responsibility is assumed
by Gamewell-FCI for their use. Specifications subject to change without notice.
©
2006 All Rights Reserved.
GAMEWELL-FCI
12 Clintonville Road, Northford, CT 06472 - Tel: (203) 484-7161 - Fax: (203) 484-7118
www.gamewell-fci.com
9020-0382 Rev. E
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GAMEWELL-FCI [ GAMEWELL-FCI BY HONEYWELL ]
