55M3500MNE rev. E
Telescopic cranes with derrick pressure sensors Calibration Manual i3500
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1.0 GENERAL DESCRIPTION
1.1
Introduction
This manual contains calibration, diagnostic and troubleshooting information for the
i3500 system. Information in this manual will enable qualified personnel to calibrate and
troubleshoot the i3500 system efficiently.
1.2
Personnel qualification and scope of this manual
This manual is intended to be used by qualified installation technicians and repair
technicians, who are fully qualified and trained to perform the procedures described in
this guide.
This manual is divided into the following sections:
SECTION 1 – GENERAL DESCRIPTION
SECTION 2 – THE i3500 SYSTEM
SECTION 3 – THE CARD/ELECTRONICS INTERFACES
1.3
Brief description of the I3500 System
The I3500 is a computerized crane monitoring system, designed as an operator aid. It
comprises sensors fitted to the crane and a display located in the cabin of the crane.
This version measures the boom cylinder pressure, the boom angle and length, and it
indicates safe or critical conditions, while performing an authorized lift of loads.
Optional sensors may also be fitted to monitor the slew angle and the rotation of the
hoist drum to provide some extra information to the operator. All the sensors are linked
through a single CANbus (Controlled Area Network).
The pressure sensors provide electrical signals that are proportional to the actual
pressures in the hydraulic boom cylinder system of the crane. An inclinometer provides
a signal that is proportional to the boom angle and a reeling drum provides a signal that
is proportional to the boom extension. The radius and the load are calculated from these
signals with the dimensional crane data pre-programmed in the I3500 system.
During operation the load lifted by the crane is calculated from the measured boom
cylinder pressure and is automatically compared with corresponding data related to the
maximum permissible crane loading. The actual load is expressed as a percentage of
the permitted load (%SWL). If this percentage exceeds a preset value, alarms and
safety functions are activated. The values of the hook load, the permissible load, the
main boom angle and the radius are displayed in a digital form on a graphic liquid
crystal display (LCD).
