Electricity: measuring and testing – Electrolyte properties
Patent
1984-02-08
1986-05-27
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrolyte properties
324 711, G01N 2700
Patent
active
045917922
ABSTRACT:
The polarized potential at the boundary between a submerged pipe and a medium is measured unaffected by the presence of a distributed IR drop in the medium due to an impressed current from a corrosion protection system. The voltage between the pipe and a reference electrode in the medium is measured when the protection system current is zero. This is accomplished with a sample-and-hold circuit controlled by a trigger signal derived from the input signal and having a variable phase for controlling the phase angle at which the sample is taken.
REFERENCES:
patent: 2803797 (1957-09-01), Crowles
patent: 3821642 (1974-06-01), Seymour
Barlo Thomas J.
Birchmeier John R.
Ruck George T.
Thompson Neil G.
Eisenzopf Reinhard J.
Gas Research Institute
Peterkin G.
Watkins Robert B.
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