L-Acoustics ARCS, Руководство оператора

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L-ACOUSTICS ARCS Manual V2.0 2/13/2003
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5. INSTALLATION PROCEDURES
WARNING: NOT FOLLOWING THE RIGGING PROCEDURES OUTLINED BELOW MAY RESULT
IN A SERIOUS SAFETY HAZARD.
5.1 INSTALLATION OF A SINGLE ROW FLOWN SYSTEM
Locate all ARCS enclosures, side-by-side, at the location where they are to be rigged. For most flown
applications, the 40 degree vertical coverage angle will be directed downwards. This means that when
flown, the rear connector jack plates will be oriented downwards and the front L-ACOUSTICS logos
will be up. Check that all ARCS enclosures are physically oriented in the desired manner.
Lift the enclosures to a vertical (standing) position by using the handles located on the top (or bottom)
of each ARCS enclosure. Array the enclosures in a tightly-wrapped configuration (i.e., wall-to-wall)
and remove the front dollies. When removing the O-ring spring pins from the positioning studs, watch
your fingers! The feeling is similar to a mouse trap...
Position the ARCS enclosures side-by-side so that the integral flying rails are aligned (this is easier if
you are on a flat surface). Use two coupling bars (ARCOUPL) per two cabinets (top and bottom) to
mechanically join adjacent ARCS enclosures. Unlock and remove one shackle to free one end of each
coupling bar (typically the front shackle). Slide two ARCOUPL bars into the corresponding rails,
between each pair of adjacent enclosures - one top, one bottom. Carefully place, lock and tighten the
end shackles to secure the coupling bars. Once all ARCS enclosures of the array have been
mechanically coupled together, top and bottom, the array is built.
Always install two ARCOUPL coupling bars between adjacent enclosures (top and bottom)
To fly an array of 2 or 4 ARCS enclosures, one BUMP3 is required. To fly an array of 1, 3, 5,
6, 7 or 8 ARCS enclosures, two BUMP3 and one LIFTBAR are required.
Each BUMP3 is designed to work as an assembly with one ARCOUPL. To construct a BUMP3
assembly, remove the two end shackles from an ARCOUPL and align the ARCOUPL and BUMP3 so
that their end holes are aligned. Secure the ARCOUPL (rear end only) with the locking nut and bolt
assembly, ensuring that the cotter pin safety is installed.
Note: With reference to the ARCS rigging reference chart, the serial number plate acts as a reference for
installing BUMP3, i.e. the serial number plate should be oriented towards the front of the array.
Once the rear connection between the BUMP3 and ARCOUPL is assembled, slide the ARCOUPL into
the corresponding upper rails of the ARCS enclosures from the rear. Lower the BUMP3 and align its
front hole with the front hole of the ARCOUPL. Align the front holes on ARCOUPL and BUMP3 and
place the pierced bolt into position to join the two assemblies. Install then tighten the nut until the
security hole in the bolt is accessible. Lock the nut into position by sliding the spring pin (cotter pin)
into the security hole.
With reference to the ARCS Rigging Reference Chart, place the main BUMP3 shackle(s) in the desired
hole of the BUMP3 and tighten securely.
For 2 or 4 element ARCS arrays, at this point, the array is ready to be flown.
For larger arrays, 2 or more BUMP3 are required and should be placed in such a way as to provide
equal load distribution. For example, for a single row 6 element ARCS array, two BUMP3 will be
placed between enclosures 2 & 3 and 4 & 5 and a LIFTBAR used between the two BUMP3. For a
double row 8 element ARCS array, BUMP3 will be placed between enclosures 1 & 2 and 3 & 4 on the
top row and a LIFTBAR used between the two BUMP3. When more than 8 ARCS enclosures are to
be flown, it is advisable to use one BUMP3 per four ARCS enclosures (vertical or horizontal) as a
guideline.
Always consult a certified rigger if you have any questions regarding safe rigging practice.