Method and apparatus for improved temperature compensation in a

Details Method and apparatus for improved temperature compensation in a Method and apparatus for improved temperature compensation in a

1978-10-16

1980-08-12

Krawczenwicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

73 86, 23230C, 204195C, G01R 2702

Patent

active

042175445

ABSTRACT:
An improved method and apparatus to compensate for temperature variations in an electrical resistance corrosion measuring system. Sacrificial probes are inserted into a corrosive atmosphere at significant points, and corrosion-related losses from these probes are measured by monitoring changes in probe resistance. By comparing these changes to a reference probe, accurate determinations of corrosion are made. A novel method of automatic temperature compensation removes essentially all degrading effects of changes in temperature on the corrosion measurement system, by obtaining a reference signal which varies proportionately with temperature and counteracting instantaneous and extended temperature changes by subtracting the reference signal due to temperature variations from the uncompensated system output signal due to the combined effects of corrosion and temperature.

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patent: 2987685 (1961-06-01), Schaschl
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patent: 3124771 (1964-03-01), Rohrback
patent: 3156631 (1964-11-01), Seyl
patent: 4019133 (1977-04-01), Manley et al.

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