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The installer must satisfy themselves that any value
entered here is in accordance with the crane manufacturer
or their agents.
7.2.12 SET RIGGING LENGTH Threshold item
This item is, once again, used for rigging. The rigging length is the maximum length allowed
during rigging operations. If the boom length is less than the “Rigging Length” then the
display can be placed in the rigging mode. If rigging mode can’t be entered because of the
rigging length threshold a message is shown on the graphical LCD informing the operator.
Generally this is only used on telescopic cranes however, in some cases it may also apply to
lattice boom scenarios.
7.2.13 CORRECT RADIUS (Unladen boom) item
This function code allows the installer to calibrate the system to account for unladen boom
deflection. As such it should only be used when the displayed load radius is less than the true
operating radius of the crane. In such a case the installer should measure the physical load
radius at a position where boom deflection is seen to have the maximum effect on the load
radius.
Maximum boom deflection occurs when the boom is fully telescoped and is positioned at
about 45-60 degrees. On duties where the winches are both assumed to be reeved over the
main boom head it is necessary to calibrate only for the main winch (winch 1). However,
when a jib is installed it is possible to calibrate boom deflection both for the main boom head
and for the head of the jib.
To calibrate, select the desired winch, fully extend the boom and position it for worst case
deflection. Measure the physical radius, confirm it is greater than the displayed radius, and
then enter it against the Unladen radius correction function code. Repeat this procedure for
any winch that is reeved over a job.
7.2.14 CORRECT RADIUS (laden boom) item
This function code allows the installer to calibrate the system to account for laden boom
deflection. As such it should only be used when the displayed load radius is less than the true
operating radius of the crane AND unladen correction has already been employed. In such a
case the installer should measure the physical load radius at a position where boom deflection
is seen to have the maximum effect on the load radius.
File : 1550-Telescopic-HRT.DOC
Issue Date: - 01/08/05
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