Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1985-10-17
1988-02-09
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 65R, 324557, G01R 3102, G01R 2702
Patent
active
047243767
ABSTRACT:
An AC ohmeter is adapted for testing insulated pipe flanges where flammable substances are involved. It employs a low frequency, low voltage oscillator and includes a precision rectifier. The output of the rectifier is smoothed and applied to a dual comparator circuit such that high, low and intermediate resistance readings are obtained.
REFERENCES:
patent: 3784906 (1974-01-01), Ironside
patent: 3963981 (1976-06-01), Vis
patent: 4266187 (1981-05-01), Slough
Palm: "Three LEDS Display Response of Null Detector"-Electronics-Jun. 22, 1973, p. 150.
Bluhm James H.
Slough Carlton M.
Burns Robert B.
Eisenzopf Reinhard J.
Kulason Robert A.
O'Loughlin James J.
Solis Jose M.
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