What type of devices should be checked and adjusted after the 5-year test?

Load weighing devices play a crucial role in ensuring the safe operation of elevators by measuring the weight of the load being lifted. After the 5-year test, it is important to check and adjust these devices to ensure they are functioning correctly, as they directly impact the elevator's safety mechanisms. Proper calibration of load weighing devices ensures that the elevator can accurately detect overload conditions, preventing potential accidents and ensuring compliance with safety regulations.

The other options, while also important for the overall maintenance and safety of an elevator system, do not specifically require adjustment after a 5-year test in the same context as load weighing devices. Door mechanisms, emergency alarms, and lighting systems all have their maintenance routines and intervals, but the specific focus on load weighing devices is crucial due to their role in load management and safety controls in elevator operations.