The PAT Load Moment Indicator1 (LMI) DS 350 has been designed to provide the crane
operator with the essential information required to operate the machine within its design
This low temperature system uses heaters for stable system operation in a subzero
climate. The main electronics are automatically warmed before the system boards and
components are energized. Therefore, all system components must be installed and sealed
from the environment when operating and/or troubleshooting in low temperature conditions.
Using a variety of sensing devices, the Load Moment Indicator (LMI) system monitors
various crane functions and provides the operator with a continuous reading of the crane's
capacity. The readings continuously change as the crane moves through the motions
necessary to make the lift.
The LMI provides the operator with information regarding the length and angle of the boom,
working radius, rated load and the calculated total weight being lifted by the crane.
If prohibited conditions are approached, the DS 350 Load Moment Indicator will warn the
operator by sounding an audible alarm, lighting a warning light, and rendering inoperative
those functions that may aggravate the crane's condition.
generally the product of a force and its moment arm; specifically, the product of the load and the load-radius. Used in the
determination of the lifting capacity of a crane.