Which of the following is NOT included in routine monitoring of a CP system?

Routine monitoring of a cathodic protection (CP) system typically focuses on parameters that directly influence the effectiveness of the protection it provides. Voltage measurements, current output readings, and resistance checks are all critical components of this monitoring.

Voltage measurements provide insights into the potential differences that indicate the effectiveness of the CP system in reducing corrosion. Current output readings are essential to ensure that the anodes are supplying sufficient protective current to the structure. Resistance checks help assess the integrity of the anodes and the overall system, ensuring it operates efficiently.

Moisture content around the anodes, however, is not a standard aspect of routine monitoring. While moisture does play a role in corrosion processes and can affect the performance of a CP system, it is not routinely measured in the same practical and direct manner as the other parameters listed. Its influence is generally considered indirectly, alongside other environmental factors, rather than as a routine operational metric crucial for the immediate assessment of the CP system’s performance.