may be integral with the sensor or may be a separate assembly.
2.2.2.3
Glass Break Simulator
The Contractor shall provide a device that can induce frequencies into the
protected pane of glass that will simulate breaking glass to the sensor
element without causing damage to the pane of glass.
2.2.3
Glass Break Sensor, Acoustic
The glass break sensor shall detect high frequency vibrations generated by
the breaking of glass while ignoring all other mechanical vibrations. An
alarm signal shall be transmitted upon detecting such frequencies to the
alarm annunciation system.
2.2.3.1
Acoustic Sensor Element
The sensor element shall be a microprocessor based digital device. The
sensor shall detect breakage of plate, laminate, tempered, and wired glass
while rejecting common causes of false alarms. The detection pattern of
the sensor element shall be a range of 6 m 20 feet minimum. The sensor
element shall be equipped with a light emitting diode (LED) activation
indicator. The activation indicator shall light when the sensor responds
to the high frequencies associated with breaking glass. The LED shall be
held on until it is turned off manually at the sensor signal processor or
by command from the alarm annunciation system. The sensor signal processor
shall process the signals from the sensor element and provide the alarm
signal to the alarm annunciation system.
2.2.3.2
Acoustic Sensor Signal Processor
The sensor signal processor shall process the signals from the sensor
elements and provide the alarm signal to the alarm annunciation system.
The sensitivity of the sensor shall be adjustable by controls within the
sensor signal processor. The controls shall not be accessible when the
sensor signal processor housing is in place. The sensor signal processor
may be integral with the sensor or may be a separate assembly.
2.2.3.3
Acoustic Glass Break Simulator
A device that can induce frequencies which simulate breaking glass to the
sensor shall be available for the specific sensor selected. The simulator
shall not cause damage to the pane of glass.
2.2.4
Duress Alarm Switches
**************************************************************************
NOTE: The designer will decide what type of duress
alarm should be used for this project.
**************************************************************************
Duress alarm switches shall provide the means for an individual to covertly
notify the alarm annunciation system that a duress situation exists.
2.2.4.1
Footrail
Footrail duress alarms shall be designed to be foot activated and floor
mounted. No visible or audible alarm or noise shall emanate from the
switch when activated. The switch shall lock in the activated position
SECTION 13721A
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