PAT DS 50, Руководство оператора

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Operator's Manual DS 50 / 0002
Second Edition 03/18/1997 – CSH (con:K2AA V1.0) 031-300-190014_A.doc
3
The LMI can only work correctly, if all adjustments have been properly set. For correct
adjustment, the operator has to set the operating code and the parts of line (reeving) thoroughly
and correctly in accordance with the real rigging state of the crane. To prevent material damage
and serious or even fatal accidents, the correct adjustment of the LMI has to be ensured before
starting the crane operation
3 SYSTEM DESCRIPTION
The PAT Load Moment Indicator DS 50 consists of a central micro processor unit with build in length- and
angle sensor, operating console, pressure transducers, and anti-two block switch(es).
The system operates on the principle of reference/real comparison. The real value, resulting from the
pressure measurement is compared with the reference data, stored in the central processor memory and
evaluated in the microprocessor. When limits are reached, an overload-warning signal is generated at the
operator’s console.
The fixed data regarding the crane, such as capacity charts, boom weights, centers of gravity and
dimensions are stored in memory chips in the central processor unit. This data is the reference information
used to calculate the operating conditions.
The length/angle sensor mounted inside the cable reel, which is mounted on the boom registers boom
length and boom angle. The boom length is measured by the cable reel cable, which also serves as an
electrical conductor for the anti two-block switches.
Pressure transducers attached to the piston and rod sides of the hoist cylinder measure the crane load.
The console has two functions:
•
displays information to the operator
•
input terminal for operating mode and reeving (parts of line)
The operator’s console is mounted in the operator’s field of vision. For a better identification of displays
and operating elements, they are continuously backlit during operation.