Field Measurements 5:5
CP 1 – Cathodic Protection Tester Course Manual
© NACE International, 2000
02/01/05
pinpointed. Upon completion of the survey, the data are downloaded into a
computer and often printed in graph form.
The survey is made over the line, so other personnel are assigned to locate
and stake the line and provide other assistance.
When testing multiple pipelines that are bonded together, the survey data
may represent an average of all the pipelines.
Reading
+
_
Cu/Cu SO
4
Ref. Cell
Voltmeter
Pipe
Electrolyte
Potential Profile
Figure 5.2 Pipe-to-Soil Potential Profile
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