Arrangement for monitoring cathodically protected structures

Details Arrangement for monitoring cathodically protected structures Arrangement for monitoring cathodically protected structures

1981-09-01

1984-03-13

Tokar, Michael J.

Electricity: measuring and testing

Electrolyte properties

324 65CR, 324 72, 324 711, G01N 2742

Patent

active

044370652

ABSTRACT:
An arrangement for monitoring the potential of a cathodically protected buried metallic structure. The apparatus includes a measuring electrode to be inserted into the soil and electrically coupled to the metallic structure to be measured, a reference electrode placed on or in the soil, and a measuring circuit for measuring the potential difference between the measuring and reference electrodes. The measuring circuit also generates a reference potential to generate a pulse signal having a frequency proportional to the amount by which the measured potential exceeds the reference potential. A counter counts the number of pulses during a measuring cycle that is measured by a timer. A computer computes from timer and counter output data, the average value of the amount by which the measured potential exceeds the reference potential during a measuring cycle.

REFERENCES:
patent: 2700501 (1955-01-01), Wang
patent: 4258323 (1981-03-01), Andrews et al.

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