System overview
EST3 Installation and Service Manual 1.39
Displays C and D are model 3-6/3Sxxx. The display C
configuration permits manual selection of the Alert, EVAC, and
Page signals by floor. This configuration is well suited for
systems which do not sound signals through the entire facility
during an alarm. Responsible authorities can then manually add
EVAC and Alert signals to other floors of the facility. Display
configuration D is used in facilities which sound the Alert signal
in all areas not receiving the EVAC signal. This eliminates the
need to switch the Alert signal. The middle switch is not used,
the middle LED indicates amplifier status.
Messages
General
While there is no standardization on message content, messages
must tell the occupant what is happening, why it is happening,
and what actions they should take.
As a rule, each message should be repeated three times. If there
is more than one language spoken in the area, the messages
should be provided in each language.
A male voice has been demonstrated to be more authoritative
than a female voice, and should be used where urgency is
required. A female voice has been shown to initially gain the
public’s attention quicker than a male voice.
Alarm message format
The basic alarm message format consists of an alarm tone
followed by an evacuation message repeated three times. The
suggested alarm tone can take the form of a 1000 Hz tone
modulated by the standard 3-3-3 evacuation pattern, a slow
whoop, an electronic bell, a constant tone, or a constant tone
modulated at a 120 pulse per minute rate. Please refer to the
Authority Having Jurisdiction for specific requirements.
Typical Alarm Message text:
Female Voice: “May I have your attention please. May I
have your attention Please.” Male Voice: “There has been a
fire reported in the building.” “Proceed to the nearest
stairwell and exit the building.” “Do not use the elevators.”
“Repeat, do not use the elevators.”
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