Because of the corrosion on pipelines, port stakes, tanks and similar steel structures, the constant control of the system should be done to ensure correct and efficient operation of the cathodic protection systems and the datas should also be taken and interpreted within a certain period of time.
It is necessary to do special measurements at some critical points like overhead lines (AC induction) railway crossing, creek or river crossings, foreign pipeline intersections or etc.
Such interferences on the pipeline and all steel structures are known to cause the current escape and irregular operation of cathodic protection system.
It is very important to apply the most accurate measurement technique in such areas.
You can do or have make cathodic protection tests, either in the form of service with the operator, or simply by hiring a device.