High-powered transmitter enables analysis from one transformer rectifier to the next. Transmitter can be powered from CP transformer, eliminating need for batteries. RS-232 interface allows uploading of data for graphical representation of records on site. Optional A-Frame accessory for accurately pinpointing coating defects. If the coating is damaged causing holidays, or if there is an electrical contact between the pipeline and another metal structure, it is necessary to increase the CP current to compensate for the resulting losses.
Excessive current can be detrimental to the pipe.
The engineer responsible for the pipeline integrity must therefore achieve a fine balance between effective protection and acceptable current consumption. If the current becomes excessive or the cathodic protection ineffective, the pipeline must be surveyed to search for the major faults. The potential gradient between two access points is measured and the current derived through calculation. This method is lengthy, complicated, costly and presents a significant risk of error in measurements and calculation. The Pearson Method.