Federal Signal Corporation 2001SRNB, Инструкция по установке и эксплуатации

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1
SECTION I
CHARACTERISTICS
291299A
Figure 1-1. Model 2001SRNB
1-1. SCOPE OF THIS MANUAL.
This service manual describes the
characteristics, specifications, installation,
controls/theory of operation, and service and
maintenance of the Federal 2001SRNB
siren.
1-2. GENERAL.
Federal’s 2001SRNB siren (figure 1-1) is
an electro-mechanical, DC, rotating siren that
is capable of producing high intensity
warning signals over a large area. A highly
efficient design enables the siren to produce
a high sound level, while making moderate
demands on the power source.
1-3. SIREN DESCRIPTION.
The 2001SRNB siren is a single tone
siren capable of producing a 128 dB sound
level at 100 feet for a minimum of 15
minutes, when using the 2001DCB Control
Unit/Battery Box with fully charged, standard,
deep-cycle, marine batteries. 30 minute duty
cycle operation is available with option
2001TRB. This option supplies DC current
directly to the siren from a 220/240VAC line.
Two motors are used to create the siren
signals. One motor rotates the siren
assembly. The second motor, which
produces the sound energy, is attached to a
stator with a rotor mounted on the motor
shaft concentric to the stator. The rotor and
stator each contain one row of ports. As the
motor rotates the rotor, air is drawn into the
rotor and passes through the rotor and stator
ports in pulses. These pulses are produced
when the rotor alternately opens and closes
the stator ports. The pulses of air produce
sound at a frequency (pitch) that is
dependent upon the rotational speed of the
motor and the number of ports in the rotor-
stator combination.
1-4. SIGNAL DESCRIPTION.
The 2001SRNB siren is capable of
producing a steady signal and a wailing
signal. The steady signal is frequently used
as a Civil Defense “Alert” signal. The wailing
signal is often used as a Civil Defense
“Attack” signal. Any of the signals are
capable of being used for any desired
application. These signals are shown
graphically in figure 1-2.
Figure 1-2. Signal Characteristics.