housing specified. If the pan/tilt is to be mounted outdoors, the pan/tilt
shall be weatherproof, and sized to accommodate the camera, lens and
housing weight plus maximum wind loading encountered at the installation
site. The pan/tilt shall have heavy duty bearings, hardened steel gears,
externally adjustable limit stops for pan and tilt, and mechanical, dynamic
or friction brakes. Pan/tilt shall be permanently lubricated. The motors
shall be thermally or impedance protected against overload damage. Pan
movement shall not be less than 0 to 350 degrees, tilt movement shall not
be less than plus and minus 90 degrees. Pan speed shall not be less than 6
degrees per second, and tilt speed shall not be less than 3 degrees per
second. The pan/tilt shall be supplied complete with wiring, wiring
harnesses, connectors, receiver/driver, pan/tilt control system,
pre-position cards, or any other hardware and equipment as needed to
provide a fully functional pan/tilt mount to fulfill the site design
requirements.
2.8.9
Explosion Proof Housing
The explosion proof housing shall meet the requirements of NEMA 4 for
hazardous locations. The housing shall be designed to provide a tamper
resistant enclosure and shall be equipped with tamper proof latches. It
shall be supplied with the proper mounting brackets for the specified
camera and lens.
2.9
VIDEO MONITOR
**************************************************************************
NOTE: The designer will specify the size of the
monitor picture tube in this paragraph, and whether
the monitor is to be rack mounted or cabinet mounted
in paragraph "Configuration."
**************************************************************************
2.9.1
Monochrome Video Monitor
The monitor shall conform to EIA 170, EIA ANSI/EIA-375-A, and UL 1492
specifications. All electronic components and circuits shall be solid
state except for the picture tube. The monitor shall operate on 120 volts
60 Hz AC power, shall have a stabilized high voltage power supply, and
regulated low voltage power supplies. The monitor shall have automatic
frequency control (AFC), bandwidth greater than 7 MHz, and horizontal
resolution not less than 700 lines at the center of the picture tube. The
monitor shall be capable of reproducing a minimum of 10 discernable shades
of gray as described in EIA ANSI/EIA-375-A. The video input shall accept
composite video with switchable loop-through or 75 ohm termination. The
monitor shall operate on 60 Hz AC power, and shall be capable of operating
at a voltage of [105 to 130] [205 to 240] [24] Volts.
2.9.2
Color Video Monitor
All electronic components and circuits shall be solid state except for the
picture tube. The monitor shall have a stabilized high voltage power
supply, and regulated low voltage power supplies. The monitor shall have
automatic frequency control (AFC) and horizontal resolution not less than
280 lines at the center of the picture tube. The video input shall allow
switchable loop-through or 75 ohm termination. The monitor shall have
circuitry for automatic degaussing. The monitor shall operate on 60 Hz AC
power, and shall be capable of operating at a voltage of [105 to 130] [205
to 240] [24] Volts.
SECTION 16751A
Page 29
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