How often are clutches used for lifting tilt panels to be proof tested?

Clutches used for lifting tilt panels are required to undergo proof testing on a regular basis to ensure their safety and reliability in lifting applications. The frequency of this proof testing is typically set to once a year. This annual testing helps to identify any wear or potential failures in the clutch mechanism that could compromise safety during operation. Regular proof testing contributes to maintaining compliance with industry standards and regulations, ensuring that all lifting equipment is safe for use and operates effectively within its intended parameters. Therefore, the correct answer emphasizes the importance of annual testing to uphold safety standards in lifting operations involving tilt panels.