System Outline; Overload Warning - PAT DS 50 Troubleshooting Manual

DS50 TROUBLE SHOOTING MANUAL
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.
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.
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
TSM DS 50-003/REV.B/031-300-190-003/12-02-96
a. telescope out
b. boom up and boom down
c. hoist up
Bypassing the DS 50 Overload Warning system
may results in property damage, injury or death.
Warning
6
LEVEL 3
load on hook.