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TSM DS 50-003/REV.C/031-300-190-003/04-20-07
DS50 TROUBLE SHOOTING MANUAL LEVEL 3
1. INTRODUCTION TO TROUBLESHOOTING THE PAT DS 50
1.1. SYSTEM OUTLINE
The PAT Overload Warning System Model DS 50 is designed to disable the
boom down and up, hoist up and tele out crane functions when the crane
attempts to lift over its limits. These limits are specified in the load capacity
chart provided by the crane manufacturer.
When the DS 50 system detects an overload condition the following crane
functions are disabled immediately.
a. telescope out
b. boom up and boom down
c. hoist up
To remove the overload condition the operator must achieve a safe working
condition. This can be achieved by lowering the load and repositioning the
crane or decreasing the radius by telescoping in. Observe that the radius can
not be decreased by lifting the boom. The boom up function is disabled while
attempting to overload the crane.
The system design allows you to operate the crane in an emergency situation
or system failure without the DS 50 system in operation. In this situation leave
the crane electric switch in the off position and press the override button while
you operate the crane manually. The DS 50 Overload Warning System is not
operative and can not warn the operator with the electric power switch in off
position.
Warning
Bypassing the DS 50 Overload Warning system
may results in property damage, injury or death.
The DS 50 system contains a central unit with integrated length and angle
sensor. The load cell is supporting the hoist drum and used to measure the
load on hook.
