User Manual IK 150 / 0031 e
© 1997 PAT GmbH · D-76275 Ettlingen · Hertzstr. 32 - 34 ·
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++49 (0) 7243 709-0 · FAX ++49 (0) 7243 709-222 · Email: [email protected]
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50 / 150 / 19_0031E.DOC / 19.03.1997 / Rev. C / rk.
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SYSTEM DESCRIPTION
The PAT DS 150 load moment indicator consists of a central microprocessor unit, operator's
console and peripheral equipment to register the angles, pressures and hoist limit. The sys-
tem operates on the principle of reference/real comparison. The real values resulting from the
force or pressure measurement is compared with the reference data stored in the central
processor memory and evaluated in the microprocessor. When limits are exceeded, an
overload warning signal is generated at the operator's console. At the same time, the danger-
ous crane movements, such as hoist up, telescope out and boom down will be stopped.
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 ref-
erence information used to calculate the overload conditions.
Boom length and boom angle are registerd by the length/angle sensor, mounted indide the
cable reel which is mounted on the boom. The boom length is measured by the cabel reel ca-
ble which also serves as electrical conductor for the anti-two-block switch.
The crane load is measured by pressure transducers attached to the piston and rod side of
the lift cylinders.