Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1975-02-11
1976-05-18
Corcoran, Robert J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324 99D, G01R 1508, G01R 1706
Patent
active
039581780
ABSTRACT:
This invention relates to a range changing circuit that operates in conjunction with a digital panel meter of fixed sensitivity. The circuit decodes the output of the panel meter and uses that information to change the gain of an input amplifier to the panel meter in order to insure that the maximum number of significant figures is always displayed in the meter. The circuit monitors five conditions in the meter and responds to any of four combinations of these conditions by means of logic elements to carry out the function of the circuit.
REFERENCES:
patent: 3187323 (1965-06-01), Flood et al.
patent: 3790886 (1974-02-01), Kurtin et al.
Mueller Theodore R.
Ross Harley H.
Carlson Dean E.
Corcoran Robert J.
Deckelmann Louis M.
Karlsen Ernest F.
The United States of America as represented by the United States
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