Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1992-01-10
1993-09-28
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324650, 324691, G01R 1512, G01R 2702
Patent
active
052489345
ABSTRACT:
An R/Z converter for use with a conventional digital multimeter (DMM) provides enhanced capabilities of the DMM in measuring impedance and other functions where DC measurements are undesirable. The R/Z converter converts the test voltage of a conventional DMM into a square wave that is applied to the device being tested. The voltage from the tested device is seen by the DMM as an average DC value that is proportional to the impedance of the device.
REFERENCES:
patent: 3689830 (1972-09-01), Caldwell et al.
patent: 3753094 (1973-08-01), Furuishi et al.
patent: 3851641 (1974-12-01), Toole et al.
patent: 3873911 (1975-03-01), Champlin
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