What is the function of a boom length indicator on a crane?

The function of a boom length indicator on a crane is specifically to indicate how far the boom is extended. This is crucial for crane operation as it helps operators understand the position of the boom in relation to the load being lifted, ensuring that the maneuvers align with the limits set for safe operation. Knowing the exact length of extension allows operators to maintain stability and avoid situations that could lead to tipping or loss of control, as different boom lengths can significantly impact the crane's center of gravity and load capacity.

The other functions related to weight measurement, angle indication, and malfunction alerts do not pertain to the primary function of a boom length indicator. Weight measurement would typically be done through load cells or similar systems, while boom angle indicators serve a separate role in ensuring that the load is being lifted at an appropriate angle. Alerts for malfunctions usually come from a different set of systems designed to monitor the condition of the crane and its components, emphasizing the importance of having clearly defined roles for each indicator in crane operation.