| 摘要 |
The invention relates to a method for determining a present value of the capacity level of a hydraulic crane (1) provided with a lifting cylinder (8), the present value of the capacity level being determined by means of a processing unit (33). The initiation of each new lifting cycle of the crane is detected and a minimum value of each lifting cycle is registered, which represents the lowest hydraulic pressure on the piston side (8a) of the lifting cylinder during the lifting cycle or the lowest cylinder force of the lifting cylinder during the lifting cycle. For at least some of the lifting cycles, the processing unit (33) determines the present value of the capacity level of the crane taking into account a control value (V c) corresponding to: - the minimum value registered for the previous lifting cycle, or - the lowest one of the minimum value registered for the previous lifting cycle and the minimum value registered for the present lifting cycle. The invention also relates to a hydraulic crane (1) comprising means for implementing the inventive method.
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