System Description
© 1996-2001 by PAT GmbH
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D-76275 Ettlingen
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Hertzstr. 32 - 34
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++49 (0) 7243 709-0
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FAX ++49 (0) 7243 709-141
5
19_1272E.DOC / 2001-04-02 / Rev. C / ko.
3.
SYSTEM DESCRIPTION
The PAT Load Moment Indicator DS 350 consists of a central micro processor unit, operating console
and various peripheral sensors.
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 micro processor. When limits are reached, an overload warning signal is gener-
ated at the operator's console. At the same time, the dangerous 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 reference infor-
mation used to calculate the operating conditions.
System operation is controlled partially by automatic devices such as angle sensors and partially by
manual devices such as switches on the operator's console.
Boom length and boom angle are registered by the length/angle sensor, mounted inside the cable
reel which is mounted on the boom. The crane load is measured by pressure transducers attached to
the piston and rod side of the lift cylinders.
