Personnel monitors are used to achieve which of the following purposes?

Personnel monitors are primarily used to verify the effectiveness of radiation control practices. They serve as a way to measure the amount of radiation exposure that an individual receives while working in environments where radiation is present. This monitoring helps to ensure that radiation exposure levels remain within safe limits, which is essential for protecting personnel from the harmful effects of radiation.

By assessing the levels of exposure, these monitors provide critical data that can inform safety protocols and improve existing radiation control measures. They help identify whether the current safety practices are adequate and whether adjustments are needed to further minimize exposure. This monitoring plays a crucial role in maintaining a safe working environment by verifying compliance with regulatory limits.

The other options relate to important aspects of radiation safety but do not directly align with the primary purpose of personnel monitors. Ensuring safety protocols and tracking equipment usage are part of broader safety management practices, while calculating total exposure time is more of a derived function rather than a direct purpose of the monitors themselves.