Coupon monitor for cathodic protection system

Details Coupon monitor for cathodic protection system Coupon monitor for cathodic protection system

G - Physics

01

N

G01N 17/02 (2006.01) G01N 27/12 (2006.01) G01R 27/08 (2006.01)

Patent

CA 2258360

An automated coupon monitor for detecting the electrical parameters associated with a pipe, a coupon and a reference electrode utilized with a cathodic protection system. A voltage detector circuit has its output applied to a pair of sample and hold circuits, one for recording E OFF and the other for recording E ON. Series connected between the coupon and the pipe is a zero resistance current detector circuit and an interrupter switch for measuring the pipe-coupon current and periodically interrupting that current to permit measurement, sampling and storing of E OFF. The sample and hold circuits and the interrupter switch are controlled by a microprocessor controller. The circuit provides DC level outputs which can be easily read by a digital multimeter or stored in a data logger for subsequent reading or transmission to another location.

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