Belden Hirschmann HC4900, User Manual

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4.2 Utilization display (bar graph)
The Utilization display (bar graph) indicates how much of the admissible load
moment (rated moment) is used. As the rated moment changes constantly
during load operation, the load moment display also changes constantly.
The utilization display is marked with differently colored fields:
Green: "Safe” operation
(0...90% of rated moment)
Yellow: “Pre-warning range” (90...100% of rated moment)
Red: “Overload range” (> 100% of rated moment
)
4.3 Indicator light
Pre-warning lights
This yellow pre-warning light comes up when the load on the
machine amounts to more than 90% of the respective maximum
carrying capacity, which indicates that an overload situation is
immediately pending.
For the operator, this means that the machine work can
continue only with the greatest amount of caution.
Overload warning light
This red Overload warning light indicates to the machine
operator that an overload condition has occurred. It lights up
when the crane load has reached 100% of maximum load
carrying capacity permitted for the current operating status.
The acoustic alarm sounds. The load-moment-increasing crane
movements are switched off at the same time
A2B switch lamp (if the machine need)
This red warning light lights up when the A2B (hoist limit) switch
contacts open, i.e. when a hoist limit situation has occurred. The
STOP