Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1984-07-16
1986-05-06
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 712, G01R 2702
Patent
active
045874794
ABSTRACT:
An electrical resistance-type corrosion measuring probe provides an output signal corrected for temperature by computing the ratio of resistance of a test element exposed to a corrosive element to resistance of a reference element protected from the environment. A secondary temperature compensation is provided for by compensating the corrosion output signal for dynamic or short term variation of temperature difference between test and reference elements. The corrosion output signal is compensated for still other environmentally induced errors by measuring temperature gradient between an inner end of the probe within the fluid environment and a portion of the probe outside the corrosive fluid environment. Errors in corrosion probe output signal due to bending stresses on the probe that result from fluid flow velocity and fluid pressure of the environment, are also compensated by measuring bending strain and pressure to provide additional compensation for the corrosion output signal.
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Finley Charles M.
Rhoades Rex V.
Eisenzopf Reinhard J.
Rohrback Corporation
Solis Jose M.
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