Elliott Digger Derrick, Operation & Maintenance Manual, Page: 299 / 376

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W450321A 09/12
5.6 Calibrating Span of Extension and Angle
WARNING!
THE AREA OVERHEAD ABOVE THE CRANE MUST BE CLEAR OF OBSTRUCTIONS
PRIOR TO CALIBRATING SPAN OF EXTENSION AND ANGLE!
In order for the system to properly calculate the boom length and the boom angle, the “Span Number”
must be entered into the system. Obtain the Span Number with the following steps:
1. Measure the boom from the base foot pin to the center of the head sheave pin. Record this
measurement.
2. Raise the boom to between 60°-65° and fully extend the boom. Record the measurement from
the digital level, for entry into the system later in this procedure.
3. From the main screen, press the “Menu Up” button until “03 Span Sensors” is reached.
4. Press the “Span Extension” button.