Hoisting, aiming and securing the array
8.2.1 Horizontal aiming
In connection with the Z5707 SL Aiming plate the horizontal
aiming of the array can be sufficiently and easily adjusted.
Note: To prevent the array from heavy movements, raise one
hoist while lowering the other.
However, the chain hoist motors must be operated slowly and
evenly.
With a chain hoist distance of minimum 0.6 m (2 ft), preferably
approx 1 m (3 ft), the SL Aiming plate provides a horizontal angle
range of
±
15° (first and last pick holes of the load beam used).
8.2.2 Vertical aiming
Application example
To take an example: ArrayCalc indicates a frame angle of –3.6°
from vertical.
1. Using ArraySight to measure this angle, you raise the first
array to its operating height and then check the meter unit
screen.
2. The figures displayed settle as the meter compensates for the
swing of the array. If the settled display shows +0.5°, you
then use the hoists to lift the rear or lower the front of the
array. Make small adjustments and allow the meter unit to
calculate the new angle. Continue to make adjustments until
you achieve the angle of –3.6°.
3. Once the first array is complete, disconnect the meter unit from
the first sender unit and reconnect it to the sender unit of the
second array.
4. Repeat the procedure, starting with resetting the angle to zero
for the second sender unit. Raise the second array, check the
angle and adjust the angle as necessary.
5. If subsequent re-adjustment of the first array is required the
meter unit can be re-connected to the first sender unit and the
correct offset will be recalled.
d&b XSL Rigging manual 1.1 en
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