Voltage measurement instrument and method having improved...

Details Voltage measurement instrument and method having improved... Voltage measurement instrument and method having improved...

2011-08-23

2011-08-23

He, Amy (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S072500

Reexamination Certificate

active

08004286

ABSTRACT:
Voltage measuring instruments and methods of measuring the amplitude of an input signal are disclosed. In an example method of measuring the amplitude of an input signal, in an AC measurement mode, the input signal is coupled through a capacitor, the RMS amplitude of the input signal coupled through the capacitor is determined, and a digital value corresponding to the RMS amplitude is provided. In an automatic measurement mode, the RMS amplitude of the input signal is determined without first coupling the input signal through the capacitor, and a digital value corresponding to the RMS amplitude of the input signal is provided. Further disclosed is a calibration procedure may be used to compensate for any offset of an amplifier of the voltage measuring instrument.

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Taha, Saleem et al, “Microcomputer-controlled Autoranging DMM with Autocalibration”, Int. J. Electronics, vol. 62, No. 1, 1987, pp. 105-113.

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