positioners, and camera from the environment encountered for camera
operation. The lower dome shall be tinted acrylic and shall have a light
attenuation factor of not more that 1 f-stop.
An integral heater, sized
to maintain the lower dome above the dew point, shall be part of the camera
system. The housing shall be equipped with integral pan/tilt 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 dome. The pan/tilt shall have heavy
duty bearings and hardened steel gears. The pan/tilt shall be permanently
lubricated. The motors shall be thermally or impedance protected against
overload damage. Pan movement shall be 360 degrees and tilt movement shall
not be less than plus and minus 90 degrees. Pan speed shall not be less
than 20 degrees per second, and tilt speed shall not be less than 10
degrees per second. There shall not be less than 99 preset positions, with
positioning speeds of at least 360 degrees per second in the automatic
mode, and not less than 120 degrees pre second in the manual positioning
mode, with a positioning accuracy of plus or minus 1/2 degree. Each set of
preset position data shall include auto focus, auto iris, pan, tilt, and
zoom functions. The system shall be able to automatically scan between any
two electronically-set limits, and shall be able to operate in the "tour"
mode covering up to all presets in a user defined sequence. The dome system
shall withstand temperature ranges from minus 40 to 50 degrees C minus 40
to 122 degrees F over a humidity range of 0 to 90 percent, non-condensing.
2.7
CAMERA LENSES
**************************************************************************
NOTE: The designer will provide drawings of the
lens field of view labeled with the correct lens
focal length for each camera, or a table that
references the camera location and the required lens
focal length in order to support this paragraph.
**************************************************************************
Camera lenses shall be all glass with coated optics. The lens mount shall
be a C or CS mount, compatible with the cameras selected. The lens shall
be supplied with the camera, and shall have a maximum f-stop opening of
f/1.2 or the maximum available for the focal length specified. The lens
shall be equipped with an auto-iris mechanism unless otherwise specified.
Lenses having auto iris, manual iris, or zoom and focus functions shall be
supplied with connectors, wiring, receiver/drivers, and controls as needed
to operate the lens functions. Lenses shall have sufficient circle of
illumination to cover the image sensor evenly. Lenses shall not be used on
a camera with an image format larger than the lens is designed to cover.
Lens focal lengths shall be as shown or specified in the manufacturer's
lens selection tables.
2.8
CAMERA HOUSINGS AND MOUNTS
**************************************************************************
NOTE: The designer will specify the types of
housings to be used at the site. The designer will
eliminate the specifications for housings not
specified for the site.
**************************************************************************
The camera and lens shall be enclosed in a tamper resistant housing as
specified below. Any ancillary housing mounting hardware needed to install
the housing at the camera location shall be provided as part of the
SECTION 16751A
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