than 8 complete four-round groups of code before being rewound.]
[Electronic transmitters shall have a standby battery with the capacity to
power the transmitter in a standby status for 60 hours and then transmit
not less than 8 complete four-round groups of code. Transmitter primary
and standby power shall be supervised in accordance with the paragraph
titled "Supervision".] Transmitters shall be designed for operation at 100
milliamperes and shall be capable of full operation between 70 and 120
milliamperes DC line current. Transmitters shall have the ability to
transmit signals through ground to overcome an open circuit. Activation of
transmitter when a single open fault is present on exterior fire alarm
circuit shall cause transmitter to transmit four complete code rounds via
transmitter earth ground connection. Transmitters shall have a device to
disconnect the transmitter for maintenance purposes. Transmitter code
shall be as directed by the Contracting Officer. The transmitter shall be
capable of transmitting signals at varying rates of speed ranging from
electrical impulses at 3 1/4 second intervals to 1/4 second intervals and
shall be field adjustable to any speed within this range. Mechanism shall
be housed in a wall mounted locked metal cabinet. Cabinet shall be
finished in gloss red enamel. Provide engraved metallic bronze or
nickel-alloy or rigid plastic code number plate mounted on face of
transmitter housing.
][2.2.12.3
Radio Fire Alarm [Master Box] [Auxiliary Transmitter]
**************************************************************************
NOTE: Use this paragraph for bases having radio
alarm systems. Transmitters must be obtained from
the manufacturer of the base system. Provide model,
style, color and frequency or frequencies to match
existing. Interface panels are required by some
manufacturer's systems (for supervision of wiring
between the control panel and the radio
transmitter), whereas with other manufacturer's
systems all required functions are contained within
the transmitter enclosure. Edit accordingly. The
wording of this paragraph has been approved by a
Level III Contracting Officer. The Contracting
Officer, Code 02 must be notified when this
paragraph is included in a project specification.
**************************************************************************
Provide a [_____] model [_____] radio fire alarm [master box] [auxiliary
transmitter] [and model [_____] interface panel] [combination auxiliary
transmitter and interface panel] to be compatible with the existing base
system. Notwithstanding any other provisions of this contract, no other
product will be acceptable. Transmitter shall operate on a frequency of
[_____] MHz [AM] [FM]. Transmitter code number(s) shall be as specified by
the Contracting Officer. Transmitter [and interface] shall operate on 120
VAC and shall also be provided with the manufacturer's approved battery
charger and standby battery adequate to supply standby power for at least
60 hours. Transmitter housing shall be [red] [lime yellow] in color.
Mounting shall be [wall] [pole] [pedestal], 1.5 m5 feet above grade.
[Arrange the transmitter(s) to send a separate alarm signal for each alarm
and supervisory zone on the fire alarm control panel as specified in the
paragraph entitled "Initiating Zones," and a common trouble signal for any
trouble condition on the control panel.] Provide [exterior] antenna as
recommended by the transmitter manufacturer. Provide engraved metallic
bronze or nickel-alloy or rigid plastic code number plate mounted on face
of housing.
SECTION 13852N
Page 31
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