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.
2.8.6
Exterior Dome Housing
An exterior dome housing shall be provided for each camera as shown. The
dome housing shall be a pendant mount, pole mount, ceiling mount, surface
mount, or corner mount as shown. The housing shall be constructed to be
dust and water tight, and fully operational in 100 percent condensing
humidity. The housing shall be purged of atmospheric air and pressurized
with dry nitrogen, shall be equipped with a fill valve and overpressure
valve, and shall have a pressure indicator visible from the exterior. The
housing shall be equipped with supplementary camera mounting blocks or
supports as needed to position the specified camera and lens to maintain
the proper optical centerline. All electrical and signal connections
required for operation of the camera and lens shall be supplied. The
housing shall provide the environment needed for camera operation The lower
dome shall be black opaque acrylic and shall have a light attenuation
factor of not more that 1 f-stop. 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.
2.8.7
Exterior Wall Mount
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NOTE: This paragraph gives the designer a choice of
the three most commonly used wall mount lengths. If
another length is required, the designer should
review catalogs of CCTV equipment manufacturers to
find a mount in current production that will fulfill
the requirement.
**************************************************************************
The exterior camera wall mount shall be [406.4 mm (16 inches)] [609.6 mm
(24 inches)] [914.4 mm (36 inches)] [[_____] mm ([_____] inches)] [16] [24]
[36] [_____] inches long, and shall have an adjustable head for mounting
the camera. The wall mount and head shall be constructed of aluminum,
stainless steel, or steel with a corrosion-resistant finish. The head
shall be adjustable for not less than plus and minus 90 degrees of pan, and
not less than plus and minus 45 degrees of tilt. If the bracket is to be
used in conjunction with a pan/tilt, the bracket shall be supplied without
the adjustable mounting head, and shall have a bolt hole pattern to match
the pan/tilt base.
2.8.8
Pan/Tilt Mount
The pan/tilt mount shall be capable of supporting the camera, lens and
SECTION 16751A
Page 28
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