PAT DS 350/1318 Graphic, Operator'S Manual

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System Description
© PAT Rev. 7 03/27/01 // MO 191318_7.DOC
3
3 SYSTEM DESCRIPTION
The PAT Load Moment Indicator DS 350 consists of a central micro processor unit, operating
console, length/angle sensor, pressure transducers, and anti-two block switches.
The system operates on the principle of reference/real comparison. The real value, resulting
from the pressure measurement is compared to the reference data, stored in the central
processor memory and evaluated in the micro processor. When limits are reached, an overload
warning signal is generated at the operator’s console. At the same time, the aggravating 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 information used to calculate the operating conditions.
Boom length and boom angle are registered by the length/angle sensor, mounted inside the
cable reel which is mounted on the boom. The boom length is measured by the cable reel cable
which also serves as an electrical conductor for the anti two-block switches.
The crane load is measured by pressure transducers attached to the piston and rod side of the
hoist cylinders.
The interactive user guidance considerably simplifies the input of operating modes as well as
the setting of geometry limit values.