Federal Signal Corporation 2001SRNB, Инструкция по установке и эксплуатации

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effective range of the 2001SRNB siren is
approximately 5800 feet.
Wind speed and direction often affect the
propagation of sound from the siren.
Consequently, the direction of the prevailing
wind may also be a factor to consider when
selecting the installation site(s) of a small,
one or two-siren system. For example, if the
prevailing wind is from the west, it may be
desirable to install the siren toward the
western edge of the area to be covered.
Other factors to consider before
selecting the installation site include the
availability of electrical power, the ease of
installation and maintenance, the height of
surrounding obstructions, and security
against vandalism.
3-2. SIREN INSTALLATION.
A. General.
Most siren installations are one of two
types: Pole Mount or Flat Surface Mount.
These two configurations make it possible to
install a siren in almost any situation. If the
installations in this paragraph are not
suitable, modification of one of the
configurations may be practical.
A siren is typically installed 50 ft. above the
ground. If the installation is located less than
50 ft. above the ground, the sound intensity
at close range may increase, but at the same
time the effective range of the siren may be
reduced. Conversely, if the siren is located
more than 50 ft. above ground, the effective
range of the siren may increase, but the
sound may skip over areas closer to the
siren. These variables may make it desirable
to test the sound coverage of the siren at
various heights and locations whenever
possible.
B.
Pole Mounting.
A typical siren pole-mounted installation
is shown in figure 3-1. The siren is mounted
on a Class 2 utility pole 50 ft. above the
ground. It is attached to the pole by means of
legs, as shown in figure 3-2.
Figure 3-1. Typical Pole-mounted Installation