Electromagnetic flowmeters are used to measure the speed of water flow in water distribution systems.Corrosion problem in metal pipelines can be solved by cathodic protection methods.This paper presents a research on corruptive effects of the cathodic protection Ring Terminal system on electromagnetic flowmeter depending on its measuring principle.
Experimental measurements are realized on the water distribution pipelines of the Izmir Municipality, Department of Water and Drainage Administration (IZSU) in Turkey and measurement results are given.Experimental results proved that the values measured by the Switch electromagnetic flowmeter (EMF) are affected by cathodic protection system current.Comments on the measurement results are made and precautions to be taken are proposed.